Compute Lamé's first parameter λ = Eν/[(1+ν)(1−2ν)] from elastic modulus and Poisson's ratio for constitutive analysis.
输入弹性模量 E 与泊松比 ν，求拉梅常数 λ。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| First Lamé constant | λ = E·ν/((1+ν)(1−2ν)) | Gabriel Lamé, 1852 |
| Second constant | μ = G = E/(2(1+ν)) | Standard elasticity relations |