A study on axial compression of tubular metallic shells having combined tube–cone geometry

摘要: Abstract The present paper deals with the experimental and computational study of collapse metallic shells having combined tube–cone geometry subjected to axial compression between two parallel plates. aim is influence shell thickness cone angle on its mode deformation. Shells were top one third length as tube remaining bottom truncated semi-apical about 23°. other geometrical dimensions almost same. tested in an INSTRON universal testing machine, identify their modes associated energy absorption capacity. In experiments it was found that process all initiated by development axisymmetric fold followed a plastic zone increasing length. An Finite Element model presented analysed, using non-linear FE code FORGE2 [13]. Six noded triangular elements used descretize domain. material idealised rigid visco-plastic. Experimental computed results deformed shapes corresponding load-compression energy–compression curves compared validate model. Typical variations nodal velocity distribution, equivalent strain rate, strain, hoop stress principal are help predicting collapse. On basis has been presented, analysed discussed. Further simulate specimens lower angles 19° 23° conical portion. It mainly governed