deri

module opensg.utils.shell

opensg.utils.shell.deri(e)

Compute derivatives and curvatures of a local frame.

This function computes the derivatives of the local frame vectors and the associated curvatures of the shell element.

Parameters:

e (tuple) – Tuple of three ufl.Vector objects (e1, e2, e3) forming the local frame

Returns:

tuple – Six scalar values representing the curvatures: (k11, k12, k21, k22, k13, k23)