MATLAB: How to create a 2D shell element

2d shell element3d shell elementdeformed shapefemplotshell element

I try to learn how to create a 2D (or 3D) shell element.

Can anyone help me with the MATLAB code?

YOu may refer these:

A starting point for an element stiffness matrix

K_el = zeros(24);  %4nodes@6dof/node

This will be a very weak element until you populate it with stiffness values derived from the shell element equations.