| || Finite Element Analysis of Collapse of Metallic Tubes
Author : Gupta, P. K.;Gupta, N. K.;Sekhon, G. S.
Source : Defence Science Journal ; Vol:58(1) ; 2008 ; pp 34-45
Subject : 53 Applied Physics;532 Fluid Mechanics
Keywords : Metallic tubes;Quasi-static loading;Mode of deformation;FORGE2;Energy-absorbing devices
Abstract : Quasi-static axial and lateral compression tests were conducted on aluminium tubes of circular, rectangular, and square cross sections on a universal testing machine (Instron model 1197). During the compression process, different tubes were collapsed in different modes of collapse. These compression processes were also modelled using FORGE2 finite element code. The code has the capabilities of automatic mesh generation, modelling of die, creation of material data file, carrying out the finite element computations, and post-processing of results. The deforming tube material was modelled as rigid-visco-plastic. Development of different modes of collapse was investigated experimentally and computationally. The experimental load-compression curves and deformed shapes are compared with the computed results and found in good agreement. It is found that the proposed finite element models of the different compression processes are capable of predicting the modes of collapse.