FX_ etc Explanation of Shell Force and Moment Resultants

FX_ etc Explanation of shell force and moment resultants

These are integrals, computed by Ansys LS-DYNA, of the stresses in the shell local system to create force and moment values per unit width in the element local system.

The sign convention is taken from "Theory of Elastic Stability" Timoshenko and Gere, and the equations to derive the resultants from the local stress values are given below. ( t is the shell thickness.)

These are the forces and moments per unit width integrated over the element thickness. They are written in the element local axis system.