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Science China Physics, Mechanics and Astronomy

, Volume 56, Issue 6, pp 1209–1219 | Cite as

Accurate modelling of the crush behaviour of thin tubular columns using material point method

  • PengFei Yang
  • S. A. Meguid
  • Xiong Zhang
Article

Abstract

In this paper, we apply the material point method (MPM), also known as a meshfree method, to examine the crush behaviour of thin tubular columns. Unlike the finite element method, randomly-distributed-weak-particle triggers were used to account for the deformation behaviour of collapse modes. Both symmetric and asymmetric modes of deformation and their associated mean collapse loads are determined for an elasto-plastic constitutive law describing the tubular columns. Attention was devoted to the accuracy and the convergence of the MPM simulation, which is determined by the number of the particles and the size of the background cells used in our explicit solver. Furthermore, a novel contact approach was adopted to establish the crush behaviour of the tubular columns. Two aspects of the work were accordingly examined, including three different crush velocities (5, 10 and 15 m/s) and varied geometrical features of the tube (t/d and l/d) based on the deformation history. The results of our model, which were compared with existing analytical predictions and experimental findings, identify the critical geometric features of the tubular columns that would dictate the deformation mode as being either progressive collapse or following Euler’s buckling mode.

Keywords

thin tubular columns crush material point method deforamtiom mode elasto-plastic mean collapse load 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.School of AerospaceTsinghua UniversityBeijingChina
  2. 2.Mechanics and Aerospace Design LaboratoryUniversity of TorontoTorontoCanada

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