|Type:||4-Tensor, or section|
|Range:||[v_1, …, v_81]|
Defines stiffness tensor also called elasticity tensor. Units are pascals, , which corresponds to force per unit area.
This stiffness tensor relates the strain of a body to the stresses within the body. In the used linear form this relation is given by:
where is the initial strain of the body, i.e., the strain for which the body is free of stresses.