Yung moduli Shore A qattiqligidan qanday aniqlanadi?

Several empirical formulas exist. A common approximation: E ≈ 0.0981×(56+7.62336×S)/(0.137505×(254−2.54×S)) MPa, where S is Shore A hardness. This gives E from ~1 MPa at Shore 30A to ~15+ MPa at Shore 90A.

Qaysi Shore A qattiqligini tanlashim kerak?

Shore 40-50A: Sezgir uskunalar uchun yumshoq tayanch, yaxshi izolyatsiya. Shore 55-65A: Umumiy maqsadli, eng keng tarqalgan. Shore 70-80A: Og'ir yuklar uchun qattiq tayanch, kamroq izolyatsiya. Shore 85-90A: Juda qattiq, minimal egilish.

Shakl koeffitsienti nima va u nima uchun muhim?

Shape factor S = loaded area / force-free area. For a cylinder: S = D/(4h). Higher shape factors increase effective stiffness because rubber is nearly incompressible. The compression modulus Ec = E×(1 + 2κS²), where κ depends on the rubber compound.

Buni siljish tayanchlari uchun ishlatish mumkinmi?

This calculator assumes compression loading. For shear-loaded mounts, the shear stiffness is approximately k_shear = GA/h where G ≈ E/3 for rubber (Poisson's ratio ~0.5). Shear stiffness is typically 3-5× lower than compression stiffness.

Harorat rezina tayanch xususiyatlariga qanday ta'sir qiladi?

Rubber stiffens significantly at low temperatures. Natural rubber (NR) works well from -40°C to +70°C. Neoprene (CR): -30°C to +100°C. Silicone: -60°C to +200°C. Stiffness can increase 2-5× below -20°C.

Bepul Muhandislik Vositasi #065

Rezina tayanch kalkulyatori

Shore A qattiqligi (30–90A), tayanch o'lchamlari va statik yuklamadan rezina tebranish izolyatori qattiqligini hisoblang. Tabiiy chastota va statik egilishni aniqlang.

Shore 30A–90ASiqish QattiqligiAuto-Calc

Results

Eksenel siqilish qattiqligi

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Young’s moduli E (taxminiy)

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Tabiiy Chastota

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Statik defleksiya

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Shape Factor

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Shore A dan Young’s moduliga o'tkazish

Empirik munosabat (Gent, 1958):

Shape Factor

Siqish Qattiqligi

Shakl koeffitsientini hisobga olgan holda (rezina deyarli siqilmaydi, κ ≈ 0.93):

Tabiiy Chastota

Shore A	E (taxminan MPa)	Typical Use
30A	~0.9	Very soft pads
40A	~1.5	Soft isolation
55A	~3.0	Umumiy maqsadli
70A	~6.2	Stiff mounts
90A	~18	Very stiff

⚠️ Note: Shore dan modulga o'tkazish taxminiy hisoblanadi. Haqiqiy qattiqlik rezina tarkibiga, haroratga va yuklama sharoitlariga bog'liq. Ishlab chiqaruvchi ma'lumotlari bilan doimo tekshirib ko'ring.