eval_dU_dX

eval_dU_dX(U_at_nodes: MatrixBase | ndarray, dH_dX: MatrixBase)[source]

Evaluate derivatives of displacements with respect to undeformed real space coordinates.

Parameters:

U_at_nodes – matrix of shape (n, d); displacements at nodes
dH_dX – matrix of shape (n, d); derivatives of shape functions with respect to undeformed real space coordinates

Returns:

symbolic matrix of shape (d, d)