机械科学与技术2017，Vol.36Issue(1)：119-126,8.DOI:10.13433/j.cnki.1003-8728.2017.0118
6061-T6铝合金搅拌摩擦焊温度场的数值模型和参数影响分析
Numerical Model and Influence Analysis of Parameters for Temperature Field in Friction Stir Welding of 6061-T6 Aluminum Alloy
摘要
Abstract
A general expression is derived to describe heat generation in friction stir welding (FSW) by a tool with cylindrical pin.Three heat source models are obtained by calculating frictional stresses in the expression according to sling friction,sticking friction and the combination of them,respectively.In ABAQUS,these heat source models are implemented in subroutines to apply loads,and a model for simulating the temperature field of FSW of 12.7 mm-thick 6061-T6 aluminum alloy plate is established.The numerical analysis results are compared with the experimental.It is found that heat source models based on sticking friction and combination of sliding and sticking friction can well predict temperature field and nearly produces the same results for steady state of welding,while the model based on sliding friction gives higher temperature than the experimental.By varying relevant parameters of the model,influences of boundary conditions,preheating time,welding parameters and structural parameters of the tool are systematically studied.A number of rules and indices are obtained.关键词
铝合金/搅拌摩擦焊/温度/热源模型/数值模拟Key words
aluminum alloy/friction stir welding/temperature/heat source model/numerical simulation分类
矿业与冶金引用本文复制引用
肖毅华,张浩锋..6061-T6铝合金搅拌摩擦焊温度场的数值模型和参数影响分析[J].机械科学与技术,2017,36(1):119-126,8.基金项目
国家自然科学基金项目(11302077)资助 （11302077）
