isotropic

bulk f

bulk modulus, \(K\)

poisson f

Poisson’s ratio, \(\nu\)

shear f

shear modulus, \(G\)

young f

Young’s modulus, \(E\)

Notes:

Only one of the two options is required to define the elasticity: bulk modulus \(K\) and shear modulus \(G\), or, Young’s modulus \(E\) and Poisson’s ratio \(\nu\). When choosing the latter, Young’s modulus \(E\) must be assigned in advance of Poisson’s ratio \(\nu\).