NUMERICAL MODELLING OF THE MODE I DEFORMATION OF CLAMPED SQUARE TUBULAR STEEL BEAMS SUBJECTED TO BLAST LOADS

【Author】

H.H.Jama;M.R.Bambach;G.N.Nurick;R.H.Grzebieta;

【Abstract】

<正>This paper presents the numerical simulations of thin-walled square hollow steel beams subjected to a uniform transverse blast load.The objective of the tests was to determine the deformation and failure modes of clamped square hollow steel sections.Finite element predictions using Ls-Dyna are compared to the experimental results.The full lengths of the beams were modelled using a piecewise plasticity material model which incorporated strain hardening,strain rate hardening and temperature softening.The blast wave was simulated as a rectangular pressure pulse distributed over the top surface of the tube.Ls-Dyna and the material model used were found to predict the global and local deformation of the beams reasonably.

【Keywords】

Tubular Beams;;Impulsive Loading;;Mode 1;;Ls-Dyna;;Local and Global Deformation

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