{"id":116,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/fatigue\/"},"modified":"2026-05-23T22:51:15","modified_gmt":"2026-05-23T22:51:15","slug":"fatigue","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ro\/glossary\/fatigue\/","title":{"rendered":"Ce este oboseala mecanic\u0103? Ruperea la stres ciclic"},"content":{"rendered":"<h1>\u00cen\u021belegerea oboselii mecanice<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A kit complet \u2014 echilibrator portabil \u0219i analizor de vibra\u021bii\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-1\/\" title=\"Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A\">Echilibrator portabil \u0219i analizor de vibra\u021bii Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Portable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Prim-plan senzor de vibra\u021bii Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/vibration-sensor\/\" title=\"Senzor de vibra\u021bii\">Senzor de vibra\u021bii<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Vibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Senzor optic (tahometru cu laser)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Senzor optic (tahometru cu laser)\">Senzor optic (tahometru cu laser)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Optical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Kit de echilibrare a rotorului Vibromera: geant\u0103 de transport, condi\u021bioner de semnal multicanal, analizor portabil, baz\u0103 magnetic\u0103, senzori de vibra\u021bii \u0219i cabluri spiralate.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Balanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Baza magnetic\u0103.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/magnet-stand\/\" title=\"Stand magnetic Insize-60-kgf\">Stand magnetic Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Magnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201eMagnetic Stand Insize-60-kgf\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Band\u0103 reflectorizant\u0103\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/parts\/\" rel=\"tag\">Piese<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/reflective-tape\/\" title=\"Band\u0103 reflectorizant\u0103\">Band\u0103 reflectorizant\u0103<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Reflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Con\u021binutul kitului Balanset-1A cu unitate de interfa\u021b\u0103, senzori, tahometru \u0219i accesorii\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/ro\/product-category\/devices\/\" rel=\"tag\">Dispozitive<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/ro\/product\/dynamic-balancer-balanset-1a\/\" title=\"Echilibrator dinamic &quot;Balanset-1A&quot; OEM\">Echilibrator dinamic \"Balanset-1A\" OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + TVA (dac\u0103 este cazul)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Adaug\u0103 \u00een co\u0219\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Adaug\u0103 \u00een co\u0219\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/ro\/wp-json\/wp\/v2\/glossary\/116?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Adaug\u0103 \u00een co\u0219: &amp;lbquo;Dynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201d a fost ad\u0103ugat \u00een co\u0219\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Adaug\u0103 \u00een co\u0219<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p><strong>Oboseal\u0103 mecanic\u0103<\/strong> (denumit\u0103 \u0219i oboseal\u0103 a materialului sau, pur \u0219i simplu, oboseal\u0103) reprezint\u0103 deteriorarea structural\u0103 progresiv\u0103 \u0219i localizat\u0103 care apare atunci c\u00e2nd un material este supus unor cicluri repetate de solicitare sau de deformare \u2014 chiar \u0219i atunci c\u00e2nd tensiunea maxim\u0103 din fiecare ciclu se situeaz\u0103 cu mult sub rezisten\u021ba maxim\u0103 la trac\u021biune sau la curgere a materialului. Fisurile microscopice apar \u0219i se extind pe parcursul a mii, milioane sau chiar miliarde de cicluri, p\u00e2n\u0103 c\u00e2nd sec\u021biunea transversal\u0103 r\u0103mas\u0103 nu mai poate suporta sarcina \u0219i piesa se fractureaz\u0103, adesea f\u0103r\u0103 niciun semn vizibil de avertizare. \u00cen cazul ma\u0219inilor rotative, acesta este cel mai frecvent mod de defectare, scurt\u00e2nd \u00een t\u0103cere durata de via\u021b\u0103 a <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/rotor\/\">rotoare<\/a>, arbori, angrenaje, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bearing-defects\/\">rulmen\u021bi<\/a>, elemente de fixare \u0219i structuri de sus\u021binere, fiind determinat\u0103 direct de solicit\u0103rile ciclice care <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/vibration\/\">vibra\u021bii<\/a> pe care o impune unei ma\u0219ini.<\/p>\n<h2>1. Defini\u021bie: Ce este oboseala \u2014 \u0219i de ce este at\u00e2t de periculoas\u0103<\/h2>\n<p>Oboseala este insidioas\u0103 tocmai pentru c\u0103 contrazice intui\u021bia conform c\u0103reia o pies\u0103 este &#8220;sigur\u0103&#8221; dac\u0103 o singur\u0103 sarcin\u0103 nu dep\u0103\u0219e\u0219te niciodat\u0103 rezisten\u021ba sa nominal\u0103. \u00cen condi\u021biile \u00een care <em>repeated<\/em> \u00eenc\u0103rcare; o solicitare care este inofensiv\u0103 atunci c\u00e2nd este aplicat\u0103 o singur\u0103 dat\u0103 poate deveni letal\u0103 dac\u0103 este aplicat\u0103 de zece milioane de ori. Deteriorarea se acumuleaz\u0103 \u00een mod invizibil, piesa nu d\u0103 niciun semn evident de uzur\u0103, iar apoi cedeaz\u0103 brusc \u00een timpul func\u021bion\u0103rii normale. Deoarece echipamentele rotative supun componentele lor la cicluri continue \u2014 un arbore sufer\u0103 o inversare complet\u0103 a solicit\u0103rii la fiecare rota\u021bie \u2014 chiar \u0219i solicit\u0103rile moderate <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/unbalance\/\">dezechilibru<\/a> sau <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/misalignment\/\">nealiniere<\/a> poate atinge un num\u0103r colosal de cicluri \u00een doar c\u00e2teva s\u0103pt\u0103m\u00e2ni. \u00cen\u021belegerea oboselii este, prin urmare, esen\u021bial\u0103 at\u00e2t pentru proiectarea \u00een condi\u021bii de siguran\u021b\u0103 a utilajelor, c\u00e2t \u0219i pentru o func\u021bionare corespunz\u0103toare \u00een activitatea de zi cu zi.<\/p>\n<h2>2. Cele trei etape ale ruperii prin oboseal\u0103<\/h2>\n<p>O rupere prin oboseal\u0103 nu este un eveniment izolat, ci o succesiune de evenimente care se desf\u0103\u0219oar\u0103 pe parcursul duratei de via\u021b\u0103 a piesei. \u00cen mod obi\u0219nuit, aceasta este \u00eemp\u0103r\u021bit\u0103 \u00een trei etape.<\/p>\n<h3>Etapa 1: Ini\u021bierea fisurilor<\/h3>\n<ul>\n<li><strong>Loca\u0163ie:<\/strong> Fisurile apar la punctele de concentrare a tensiunilor \u2014 g\u0103uri, col\u021buri rotunjite, caneluri, urme de prelucrare sau defecte de suprafa\u021b\u0103 \u2014 unde tensiunea local\u0103 este amplificat\u0103.<\/li>\n<li><strong>Mecanism:<\/strong> Deformarea plastic\u0103 localizat\u0103 repetat\u0103 duce la formarea unei fisuri microscopice, de obicei mai mici de 0,1 mm.<\/li>\n<li><strong>Durat\u0103:<\/strong> Pe suprafe\u021be netede \u0219i bine finisate, faza de ini\u021biere poate consuma \u00eentre 50 \u0219i 90 % din durata total\u0103 de via\u021b\u0103 la oboseal\u0103.<\/li>\n<li><strong>Detectare:<\/strong> Extrem de dificil; fisura incipient\u0103 este, de obicei, imposibil de detectat \u00een timpul func\u021bion\u0103rii.<\/li>\n<\/ul>\n<h3>Etapa 2: Propagarea fisurilor<\/h3>\n<ul>\n<li><strong>Proces:<\/strong> Fisura avanseaz\u0103 cu o distan\u021b\u0103 infim\u0103 la fiecare ciclu de solicitare.<\/li>\n<li><strong>Rat\u0103:<\/strong> Cre\u0219terea respect\u0103 Legea lui Paris \u2014 rata de cre\u0219tere a fisurilor este propor\u021bional\u0103 cu puterea factorului de intensitate a tensiunii.<\/li>\n<li><strong>Aspect:<\/strong> Frontul fisurii netede, de obicei semicirculare sau eliptice<\/li>\n<li><strong>Beach marks:<\/strong> Modelele concentrice de tip &#8220;scoic\u0103&#8221; de pe suprafa\u021ba de fractur\u0103 reflect\u0103 etapele succesive ale dezvolt\u0103rii fisurii \u0219i constituie o amprent\u0103 caracteristic\u0103 a oboselii.<\/li>\n<li><strong>Durat\u0103:<\/strong> Adesea, \u00eentre 10 \u0219i 50 % din durata total\u0103 de via\u021b\u0103.<\/li>\n<\/ul>\n<h3>Etapa 3: Fractura final\u0103<\/h3>\n<ul>\n<li>Fisura atinge o dimensiune critic\u0103 la care ligamentul r\u0103mas nu mai poate suporta sarcina.<\/li>\n<li>Sec\u021biunea transversal\u0103 rezidual\u0103 cedeaz\u0103 brusc \u0219i \u00een mod catastrofal.<\/li>\n<li>Aceast\u0103 zon\u0103 de rupere final\u0103 este aspr\u0103 \u0219i neregulat\u0103, contrast\u00e2nd puternic cu zona de oboseal\u0103 neted\u0103 \u0219i lustruit\u0103.<\/li>\n<li>Se \u00eent\u00e2mpl\u0103 aproape \u00eentotdeauna f\u0103r\u0103 niciun semn prevestitor, \u00een timpul func\u021bion\u0103rii normale.<\/li>\n<\/ul>\n<p>Analizarea invers\u0103 a unei p\u0103r\u021bi rupte \u2014 pornind de la zona de suprasolicitare brut\u0103, trec\u00e2nd prin urmele de uzur\u0103, p\u00e2n\u0103 la punctul de ini\u021biere \u2014 reprezint\u0103 o competen\u021b\u0103 esen\u021bial\u0103 \u00een analiza defectelor \u0219i permite adesea identificarea exact\u0103 a concentr\u0103rii de tensiune care a declan\u0219at problema.<\/p>\n<h3>Oboseala la cicluri ridicate vs. oboseala la cicluri reduse<\/h3>\n<p>Inginerii fac o distinc\u021bie suplimentar\u0103 <strong>oboseal\u0103 la cicluri repetate<\/strong> (solicit\u0103ri reduse, comportament \u00een mare parte elastic, durat\u0103 de via\u021b\u0103 de peste aproximativ 10\u2074\u201310\u2075 cicluri \u2014 regimul caracteristic majorit\u0103\u021bii pieselor din ma\u0219inile rotative) din <strong>oboseal\u0103 la num\u0103r redus de cicluri<\/strong> (tensiuni ridicate cu deforma\u021bii plastice semnificative la fiecare ciclu, durat\u0103 de via\u021b\u0103 redus\u0103, caracteristic\u0103 ciclurilor termice \u0219i \u00eenc\u0103rc\u0103rilor tranzitorii intense). O\u021belurile prezint\u0103 adesea o <em>limit\u0103 de rezisten\u021b\u0103 la oboseal\u0103<\/em> \u2014 o tensiune sub care durata de via\u021b\u0103 la oboseal\u0103 devine practic infinit\u0103 \u2014 \u00een timp ce multe aliaje de aluminiu \u0219i aliaje neferoase nu au o limit\u0103 real\u0103 de rezisten\u021b\u0103 la oboseal\u0103 \u0219i vor ceda \u00een cele din urm\u0103 la orice amplitudine a tensiunii.<\/p>\n<h2>3. Oboseala materialelor \u00een ma\u0219inile rotative<\/h2>\n<h3>Oboseala arborelui<\/h3>\n<ul>\n<li><strong>Cauza:<\/strong> Solicit\u0103ri de \u00eencovoiere cauzate de dezechilibru, nealiniere sau sarcini transversale.<\/li>\n<li><strong>Stress cycle:<\/strong> Un arbore rotativ supus unei sarcini de \u00eencovoiere fixe sufer\u0103 o inversare complet\u0103 a tensiunilor la fiecare rota\u021bie (oboseal\u0103 prin \u00eencovoiere-rotire cu inversare complet\u0103).<\/li>\n<li><strong>Loca\u021bii frecvente:<\/strong> Caneluri, schimb\u0103ri de diametru, trepte \u0219i asambl\u0103ri prin presare \u2014 toate acestea reprezint\u0103 puncte de concentrare a tensiunilor.<\/li>\n<li><strong>Durat\u0103 de via\u021b\u0103 tipic\u0103:<\/strong> 10\u2077 p\u00e2n\u0103 la 10\u2079 cicluri, ceea ce echivaleaz\u0103 cu ani de func\u021bionare.<\/li>\n<li><strong>Detectare:<\/strong> O fisur\u0103 transversal\u0103 care se propag\u0103 se deschide \u0219i se \u00eenchide o dat\u0103 pe rota\u021bie, produc\u00e2nd componentele caracteristice \u201e1\u00d7\u201d \u0219i \u201e2\u00d7\u201d <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/shaft-crack\/\">shaft-crack<\/a> semn\u0103tura vibra\u021bional\u0103; un arc sta\u021bionar este adesea confundat cu aceasta, astfel \u00eenc\u00e2t comportamentul de faz\u0103 prin <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/critical-speed\/\">vitez\u0103 critic\u0103<\/a> trebuie verificat.<\/li>\n<\/ul>\n<h3>Oboseala la rulment<\/h3>\n<ul>\n<li><strong>Mecanism:<\/strong> Oboseala prin contact de rulare determinat\u0103 de tensiunile de contact hertziene ciclice din stratul superficial.<\/li>\n<li><strong>Rezultat:<\/strong> <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/spalling\/\">Exfoliere<\/a> \u2014 exfolierea rulmen\u021bilor sau a elementelor de rulare.<\/li>\n<li><strong>L10 life:<\/strong> Durata de via\u021b\u0103 statistic\u0103 la care 10% dintr-o popula\u021bie de rulmen\u021bi se va fi defectat din cauza oboselii prin contact de rulare; aceasta constituie baza standard de proiectare.<\/li>\n<li><strong>Detectare:<\/strong> Odat\u0103 ce \u00eencepe exfolierea, caracteristic <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bearing-fault-frequencies\/\">frecven\u021bele defectelor rulmen\u021bilor<\/a> apar \u00een spectru \u0219i \u00een <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/envelope-analysis\/\">analiza anvelopei<\/a>.<\/li>\n<\/ul>\n<h3>Oboseala din\u021bilor angrenajului<\/h3>\n<ul>\n<li><strong>Oboseala la \u00eencovoiere:<\/strong> Fisurile apar la raza de racordare de la baza dintelui, zona cea mai solicitat\u0103 a unui dinte supus la efort.<\/li>\n<li><strong>Oboseala de contact:<\/strong> Surface <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/pitting\/\">ciupituri<\/a> \u0219i exfolierea pe flancul de lucru.<\/li>\n<li><strong>Cicluri:<\/strong> Fiecare angrenare a din\u021bilor reprezint\u0103 un ciclu de solicitare, astfel \u00eenc\u00e2t num\u0103rul de cicluri cre\u0219te rapid.<\/li>\n<li><strong>Cedare:<\/strong> Ruptura complet\u0103 a dintelui sau deteriorarea progresiv\u0103 a suprafe\u021bei, ambele vizibile \u00een <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/gear-mesh-frequency\/\">frecven\u021ba de angrenare<\/a> \u0219i benzile sale laterale.<\/li>\n<\/ul>\n<h3>Oboseala elementelor de fixare<\/h3>\n<ul>\n<li>\u0218uruburile supuse unor solicit\u0103ri alternante cauzate de vibra\u021bii sunt victime clasice ale oboselii materialelor.<\/li>\n<li>Fisurile apar de obicei la primul filet angrenat din interiorul piuli\u021bei, punctul de maxim\u0103 concentrare a tensiunii.<\/li>\n<li>E\u0219ecul survine brusc, f\u0103r\u0103 semne prevestitoare.<\/li>\n<li>Un \u0219urub de fixare sau de cuplare defect poate duce la desprinderea sau pr\u0103bu\u0219irea echipamentului, ceea ce face ca uzura elementelor de fixare s\u0103 constituie o adev\u0103rat\u0103 problem\u0103 de siguran\u021b\u0103.<\/li>\n<\/ul>\n<h3>Oboseal\u0103 structural\u0103<\/h3>\n<ul>\n<li>Frames, <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/bearing-pedestal\/\">piedestaluri<\/a> iar sudurile sunt supuse unor solicit\u0103ri ciclice cauzate de vibra\u021biile utilajului.<\/li>\n<li>Vibra\u021biile genereaz\u0103 solicit\u0103rile alternante care determin\u0103 desf\u0103\u0219urarea procesului.<\/li>\n<li>Fisurile apar mai ales la suduri, col\u021buri \u0219i discontinuit\u0103\u021bi geometrice.<\/li>\n<li>Rezultatul este deteriorarea treptat\u0103 a structurii care sus\u021bine ma\u0219ina \u2014 ceea ce, la r\u00e2ndul s\u0103u, agraveaz\u0103 situa\u021bia <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/looseness\/\">joc mecanic<\/a> \u0219i amplific\u0103 \u0219i mai mult vibra\u021biile, cre\u00e2nd un cerc vicios d\u0103un\u0103tor.<\/li>\n<\/ul>\n<h2>4. Factori care influen\u021beaz\u0103 durata de via\u021b\u0103 la oboseal\u0103<\/h2>\n<h3>Amplitudinea solicit\u0103rii<\/h3>\n<ul>\n<li>Durata de via\u021b\u0103 la oboseal\u0103 scade brusc \u2014 \u00een mod neliniar \u2014 pe m\u0103sur\u0103 ce amplitudinea solicit\u0103rii cre\u0219te.<\/li>\n<li>O aproximare util\u0103 este Durata de via\u021b\u0103 \u221d 1\/Stres\u207f, unde n este de obicei cuprins \u00eentre 6 \u0219i 10.<\/li>\n<li>Consecin\u021ba practic\u0103 este semnificativ\u0103: o mic\u0103 reducere a solicit\u0103rii alternante poate prelungi durata de via\u021b\u0103 de c\u00e2teva ori.<\/li>\n<li>Deoarece tensiunea indus\u0103 de vibra\u021bii este componenta alternant\u0103, <strong>Reducerea la minimum a vibra\u021biilor prelunge\u0219te \u00een mod direct durata de via\u021b\u0103 la oboseal\u0103<\/strong>.<\/li>\n<\/ul>\n<h3>Tensiune medie<\/h3>\n<ul>\n<li>O solicitare constant\u0103 (medie) aplicat\u0103 peste solicitarea alternant\u0103 reduce amplitudinea alternant\u0103 admisibil\u0103.<\/li>\n<li>O tensiune medie mai mare reduce rezisten\u021ba la oboseal\u0103 (conform diagramelor Goodman, Gerber sau Soderberg).<\/li>\n<li>Prin urmare, elementele pre\u00eenc\u0103rcate sau pretensionate sunt mai vulnerabile.<\/li>\n<\/ul>\n<h3>Concentr\u0103rile de tensiune<\/h3>\n<ul>\n<li>G\u0103urile, col\u021burile, canelurile \u0219i filetele sporesc local tensiunea nominal\u0103.<\/li>\n<li>Factorul de concentrare a tensiunilor (K<sub>t<\/sub>) cuantific\u0103 acea \u00eenmul\u021bire.<\/li>\n<li>Fisurile apar aproape \u00eentotdeauna \u00een aceste zone.<\/li>\n<li>Raziile generoase \u0219i evitarea col\u021burilor ascu\u021bite constituie prima linie de ap\u0103rare.<\/li>\n<\/ul>\n<h3>Starea suprafe\u021bei<\/h3>\n<ul>\n<li>Finisajul suprafe\u021bei conteaz\u0103 \u2014 suprafe\u021bele netede rezist\u0103 mult mai bine la oboseal\u0103 dec\u00e2t cele aspre.<\/li>\n<li>Zg\u00e2rieturi, lovituri \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/corrosion\/\">coroziune<\/a> ad\u00e2nciturile sunt puncte de ini\u021biere a fisurilor.<\/li>\n<li>Tratamentele precum sablarea cu alice \u0219i nitrurarea genereaz\u0103 tensiuni reziduale de compresiune la suprafa\u021b\u0103 \u0219i \u00eembun\u0103t\u0103\u021besc semnificativ rezisten\u021ba la oboseal\u0103.<\/li>\n<\/ul>\n<h3>Mediu<\/h3>\n<ul>\n<li><strong>Oboseala prin coroziune:<\/strong> Un mediu coroziv accelereaz\u0103 propagarea fisurilor \u0219i poate elimina complet limita de rezisten\u021b\u0103 la oboseal\u0103.<\/li>\n<li><strong>Temperatur\u0103:<\/strong> Temperaturile ridicate reduc, \u00een general, rezisten\u021ba la oboseal\u0103 \u0219i favorizeaz\u0103 apari\u021bia fenomenului de fluaj.<\/li>\n<li><strong>Frecven\u0163\u0103:<\/strong> Ritmurile de ciclu foarte ridicate sau foarte sc\u0103zute pot modifica comportamentul la oboseal\u0103, \u00een special \u00een cazul \u00een care sunt implicate coroziunea sau fluajul.<\/li>\n<\/ul>\n<h2>5. Strategii de prevenire pe parcursul \u00eentregului ciclu de via\u021b\u0103<\/h2>\n<h3>Faza de proiectare<\/h3>\n<ul>\n<li>Elimina\u021bi sau reduce\u021bi la minimum concentr\u0103rile de tensiune prin utilizarea unor raze de rotunjire generoase.<\/li>\n<li>Proiecta\u021bi cu factori de siguran\u021b\u0103 adecva\u021bi \u00eempotriva obosirii materialului (de obicei \u00eentre 2 \u0219i 4).<\/li>\n<li>Alege\u021bi materiale cu propriet\u0103\u021bi bune de rezisten\u021b\u0103 la oboseal\u0103.<\/li>\n<li>Folosi\u021bi analiza cu elemente finite pentru a identifica zonele supuse unor solicit\u0103ri mari \u0219i, pe c\u00e2t posibil, evita\u021bi amplasarea orificiilor \u0219i a crest\u0103turilor \u00een aceste zone.<\/li>\n<\/ul>\n<h3>Fabricarea<\/h3>\n<ul>\n<li>\u00cembun\u0103t\u0103\u021bi\u021bi finisajul suprafe\u021belor pieselor critice, supuse unor solicit\u0103ri intense.<\/li>\n<li>Aplica\u021bi tratamente de suprafa\u021b\u0103, cum ar fi sablarea cu alice metalice \u0219i cementarea.<\/li>\n<li>Aplica\u021bi un tratament termic adecvat pentru a ob\u021bine o rezisten\u021b\u0103 optim\u0103 la oboseal\u0103.<\/li>\n<li>Evita\u021bi ca urmele de prelucrare s\u0103 fie perpendiculare pe direc\u021bia principal\u0103 a tensiunii.<\/li>\n<\/ul>\n<h3>Opera\u021biune<\/h3>\n<ul>\n<li><strong>Reducerea vibra\u021biilor:<\/strong> Bun <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/echilibrare\/\">echilibrare<\/a> and precision <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/laser-shaft-alignment\/\">alinierea arborilor<\/a> elimina\u021bi la surs\u0103 solicit\u0103rile alternante.<\/li>\n<li><strong>Evita\u021bi suprasarcina:<\/strong> Respecta\u021bi limitele de proiectare.<\/li>\n<li><strong>Prevenirea rezonan\u021bei:<\/strong> Evita\u021bi vitezele critice, unde <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/resonance\/\">rezonan\u021b\u0103<\/a> poate amplifica de multe ori solicitarea dinamic\u0103.<\/li>\n<li><strong>Controlul coroziunii:<\/strong> Straturi de protec\u021bie \u0219i inhibitori.<\/li>\n<\/ul>\n<h3>\u00centre\u021binere \u0219i monitorizare<\/h3>\n<ul>\n<li>Verifica\u021bi periodic dac\u0103 exist\u0103 fisuri, folosind metode vizuale \u0219i <a href=\"https:\/\/vibromera.eu\/ro\/glossary\/non-destructive-testing\/\">teste nedistructive<\/a> methods.<\/li>\n<li>Monitoriza\u021bi vibra\u021biile pentru a detecta din timp apari\u021bia unei fisuri.<\/li>\n<li>Scoate\u021bi din uz componentele la sf\u00e2r\u0219itul duratei de via\u021b\u0103 la oboseal\u0103 calculate, \u00een loc s\u0103 a\u0219tepta\u021bi apari\u021bia unei defec\u021biuni.<\/li>\n<li>Remedia\u021bi imediat deterior\u0103rile de suprafa\u021b\u0103, deoarece o zg\u00e2rietur\u0103 proasp\u0103t\u0103 poate deveni sursa unei fisuri viitoare.<\/li>\n<\/ul>\n<p>Din cauza vibra\u021biilor <em>este<\/em> Av\u00e2nd \u00een vedere c\u0103 oboseala materialelor se produce din cauza solicit\u0103rilor alternative, men\u021binerea vibra\u021biilor la un nivel sc\u0103zut reprezint\u0103 una dintre cele mai rentabile m\u0103suri de prevenire a oboselii disponibile. \u00cen practic\u0103, un instrument portabil cu dou\u0103 canale, precum <a href=\"https:\/\/vibromera.eu\/ro\/produs\/balanset-1\/\">Balanset-1A<\/a> permite unui tehnician s\u0103 echilibreze un rotor \u00een propriile sale rulmen\u021bi \u0219i s\u0103 verifice dac\u0103 amplitudinea rezidual\u0103 de 1\u00d7 a sc\u0103zut, reduc\u00e2nd direct efortul de \u00eencovoiere ciclic la care este supus un arbore la fiecare rota\u021bie \u0219i prelungind durata sa de via\u021b\u0103 la oboseal\u0103. Pentru a cuantifica acest compromis, un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/fatigue-life-calculator\/\">S-N \/ Calculatorul duratei de via\u021b\u0103 la oboseal\u0103 Basquin<\/a> arat\u0103 c\u00e2t de abrupt cre\u0219te durata de via\u021b\u0103 pe m\u0103sur\u0103 ce reduci amplitudinea tensiunii, iar un <a href=\"https:\/\/vibromera.eu\/ro\/calculators\/centrifugal-force-unbalance\/\">calculator pentru for\u021ba centrifug\u0103 generat\u0103 de dezechilibru<\/a> cuantific\u0103 for\u021ba ciclic\u0103 exercitat\u0103 de un anumit nivel de dezechilibru asupra rulmen\u021bilor \u0219i arborelui.<\/p>\n<p>Pe scurt, oboseala mecanic\u0103 este un mod fundamental de defectare care transform\u0103 deteriorarea ciclic\u0103 acumulat\u0103 \u00eentr-o fractur\u0103 brusc\u0103, adesea catastrofal\u0103. Eliminarea concentr\u0103rilor de tensiune din proiectare, alegerea materialelor \u0219i a tratamentelor adecvate \u0219i \u2014 un aspect esen\u021bial \u2014 men\u021binerea vibra\u021biilor la un nivel redus printr-un echilibru \u0219i o aliniere corespunz\u0103toare sunt factorii care previn acest fenomen \u0219i asigur\u0103 o durat\u0103 de via\u021b\u0103 \u00eendelungat\u0103 \u0219i fiabil\u0103 a utilajelor.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ro\/glossary\/\">\u2190 \u00cenapoi la indexul principal<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Afla\u021bi despre oboseala mecanic\u0103, deteriorarea progresiv\u0103 cauzat\u0103 de cicluri repetate de solicitare care provoac\u0103 fisuri \u0219i defec\u021biuni la arbori, angrenaje \u0219i structuri, chiar \u0219i la solicit\u0103ri sub limita de curgere.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-116","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/116\/revisions"}],"predecessor-version":[{"id":101382,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/glossary\/116\/revisions\/101382"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/media?parent=116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/categories?post=116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ro\/wp-json\/wp\/v2\/tags?post=116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}