电焊机2018，Vol.48Issue(3)：260-266,7.DOI:10.7512/j.issn.1001-2303.2018.03.51
基于收缩应变法的地铁铝合金地板FSW数值模拟
Shrinkage strain based numerical simulation of FSW process of aluminum alloy floor of metro vehicles
摘要
Abstract
The friction stir welding process of 6005A-T6 aluminum alloy metro floor was simulated by employing shrinkage strain method based on sequential thermodynamic coupling approach.In order to obtain the shrinkage strain,a thermal elastic-plastic finite element analysis of the local structure of the floor was carried out firstly by using equivalent heat source model and sequential thermodynamic coupling method.The welding induced distortion of the floor was calculated according to the obtained shrinkage strain,and the calculated results were compared with the experimental measurement results.The comparison results show that the welding deformation trend calculated by finite element method is highly consistent with the actual measurement results,and the error between calculated and experimental measurement results is within 0.5 mm.It is verified that the employed methods in this paper are feasible for predicting FSW welding induced deformation of large components.Then,the reasonable mitigating process of welding induced deformation should be adopted for the large FSW welded structures,such as the aluminum alloy floor of metro vehicles mentioned in the paper.关键词
搅拌摩擦焊/焊接变形/收缩应变法/顺序热力耦合法Key words
FSW/welding induced deformation/shrinkage strain/sequential thermodynamic coupling method/FEM分类
矿业与冶金引用本文复制引用
魏诗萌,闫占奇,迟哲,杨鑫华..基于收缩应变法的地铁铝合金地板FSW数值模拟[J].电焊机,2018,48(3):260-266,7.基金项目
辽宁省高校优秀人才支持计划(第一层次)(LR201201) （第一层次）
大连交通大学研究生创新创业项目课题(C-2017-15) （C-2017-15）
