Study on Axially Crushed Cylindrical Tubes with Grooved Surface

Abstract

In this paper, elastoplastic nonlinear behaviors of circular tubes with grooved surface subjected to axial compression are studied by using finite element method. The role of grooves is to control the deformation pattern and to decrease the fluctuation in the load displacement curve for circular tubes. It is found from our results that the deformation pattern depends on the ratio of grooved distanceλ1 to the half wavelength of folding wrinkleλc for non-grooved circular tubes, as well as the grooved depth d. Moreover, the fluctuation can be decreased by introducing grooves. However, the load efficiency is not necessarily improved by the grooves, depending on the material hardening coefficient En.