Back-calculate Poisson's ratio ν = −ε_lat/ε_ax from measured lateral and axial strains.
输入横向应变 ε_lat 与轴向应变 ε_ax,求泊松比。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Poisson ratio | nu = - epsilon_transverse / epsilon_axial | Poisson SD (1829); ISO 80000-4:2019, Quantities and units - Part 4: Mechanics |
| Typical range | Engineering materials span about 0.0 to 0.5; steel is about 0.3 | Timoshenko SP, Gere JM, Mechanics of Materials |
| Incompressible limit | nu = 0.5 corresponds to an ideal incompressible material | Timoshenko SP, Gere JM, Mechanics of Materials |
| Relation to the moduli | E = 2 · G · ( 1 + nu ), where G is the shear modulus | Roark RJ, Young WC, Formulas for Stress and Strain, McGraw-Hill |