Dynamic response of viscoplastic thin-walled griders in torsion.

Abstract

This work deals with analysis of isotropic or orthotropic girders subjected to transient dynamic loads. Numerical calculations were performed with the finite element method using ANSYS® software. The results of computation were presented as maximum angle of rotation of the girder in a function of the dynamic load factor, DLF (the ratio of pulse loading amplitude to static critical load). In study it has been taken into account apart from the elastic-plastic range of material with isotropic hardening as well as the strain rate effect described by Perzyna model.