同济大学学报（自然科学版）2011，Vol.39Issue(8)：1138-1144,7.DOI:10.3969/j.issn.0253-374x.2011.08.007
冷弯方管纵向残余应力分布的数值分析
Numerical Analysis of Longitudinal ResidualStress Distribution in Cold-formed Square Hollow Sections
摘要
Abstract
Finite element numerical technique is used in the paper to simulate the longitudinal residual stress (LRS) distirbution in a cold-formed square hollow section (CFSHS) which is produced during its roll-forming and spring-back process,and then to investigate the effects of CFSHS's width, wall thickness and yield strength on the LRS ditribution. It is concluded that LRS along the CFSHS's wall thickness presents a feature of a nonlinear distribution, tension at the outside surface but compression at the inside surface, and mostly the same amplitude at the both surface. The LRSs at the corner and at the flat side come to 50% and 45% of CFSHS's yieldstrength respectively. The LRS for a smaller width increses, whereas the LRS for a larger width does not show such the trend,as the wall thickness increases. The LRS decreases, as the width increases. The ratio of LRS to yield strength does not change significantly,as the yield strength varies.关键词
冷弯方管/成型工艺/残余应力分布/有限元分析Key words
cold-formed square hollow section/ forming technology/ residual stress distribution/ numerical analysis分类
建筑与水利引用本文复制引用
侯刚,童乐为,陈以一..冷弯方管纵向残余应力分布的数值分析[J].同济大学学报（自然科学版）,2011,39(8):1138-1144,7.基金项目
国际钢协LivingSteel项目 （）
