Axial Strain
输入伸长量 ΔL 与原长 L,求轴向应变。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Definition of normal strain | epsilon = ΔL / L, the change in length divided by the original length | ISO 80000-4:2019, Quantities and units - Part 4: Mechanics |
| Hooke law | sigma = E · epsilon, where E is the modulus of elasticity | Hooke R. (1678), De potentia restitutiva, or of Spring |
| Strain from stress | epsilon = sigma / E within the linear elastic range | ISO 80000-4:2019, Quantities and units - Part 4: Mechanics |
| Poisson effect | Transverse strain epsilon_t = -nu · epsilon, where nu is Poisson's ratio | Poisson SD (1829); ISO 80000-4:2019, Quantities and units - Part 4: Mechanics |