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

作     者：YANG PengFei MEGUID S.A. ZHANG Xiong 

作者机构：School of AerospaceTsinghua University Mechanics and Aerospace Design LaboratoryUniversity of TorontoTorontoONM5S 3G8Canada 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2013年第56卷第6期

页      面：1209-1219页

核心收录：

学科分类：07[理学] 08[工学] 070102[理学-计算数学] 0701[理学-数学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Basic Research Program of China (Grant No. 2010CB832701) Natural Sciences and Engineering Research Council of Canada (NSERC) 

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

摘      要：In this paper,we apply the material point method(MPM),also known as a meshfree method,to examine the crush behaviour of thin tubular *** the finite element method,randomly-distributed-weak-particle triggers were used to account for the deformation behaviour of collapse *** symmetric and asymmetric modes of deformation and their associated mean collapse loads are determined for an elasto-plastic constitutive law describing the tubular *** 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 ***,a novel contact approach was adopted to establish the crush behaviour of the tubular *** 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 *** 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.