Compute resilience U_r = σ_y²/(2E) — energy absorbed per unit volume within the elastic range — for toughness assessment and cushioning design.
材料在弹性范围内单位体积吸收的能量。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Modulus of resilience | U_r = sigma_y^2 / ( 2 · E ), where sigma_y is the yield strength and E the modulus | Timoshenko SP, Gere JM, Mechanics of Materials |
| Physical meaning | The maximum strain energy per unit volume absorbed within the elastic range | Timoshenko SP, Gere JM, Mechanics of Materials |
| Units | The unit is J/m^3, consistent with strain energy density | ISO 80000-4:2019, Quantities and units - Part 4: Mechanics |
| Implication for selection | High resilience suits parts subject to elastic impact or energy storage | Ashby MF, Materials Selection in Mechanical Design |