6061铝合金搅拌摩擦焊接头失效行为仿真方法研究  

Research on Failure Behavior Simulation Method of 6061 Aluminum Alloy Friction Stir Welding Joint

作　　者：朱学武 张鹏[3] 杨航 杨化伟 Zhu Xuewu;Zhang Peng;Yang Hang;Yang Huawei(General Research and Development Institute,China FAW Group Co.,Ltd.,Changchun 130013;State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise&Safety Control,Changchun 130013;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Changsha 410082)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013 [2]汽车振动噪声与安全控制综合技术国家重点实验室,长春130013 [3]汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《汽车工艺与材料》2021年第8期66-70,共5页Automobile Technology & Material

基　　金：汽车振动噪声与安全控制综合技术国家重点实验室开放基金(1803J)。

摘　　要：针对6061铝合金搅拌摩擦焊接头失效行为仿真方法进行研究。考虑焊缝及热影响区性能降低的规律,提出对接头不同区域进行精确划分的建模方法。对不同区域赋予不同材料力学性能,建立了铝合金搅拌摩擦焊接头拉伸样件的精细模型,并通过试验验证了精细模型的有效性。为保证在整车碰撞模型中的计算效率,提出将精细模型转化为等效简化模型的方法。将精细模型的材料属性、区域划分简化后赋予等效模型,其仿真峰值力与试验结果一致性良好,表明该等效模型可以表征搅拌摩擦焊接头力学性能,满足精度要求。In this paper,the simulation method of failure behavior of 6061 aluminum alloy Friction Stir Welding(FSW)joint is studied.Considering the law of performance degradation of welds and heat-affected zones,the paper proposes a modeling method for accurately dividing different areas of the joint.Given different materials mechanical performance to different areas,a fine model of the tensile specimen of aluminum alloy FSW joint is established,and the validity of the fine model is verified through experiments.In order to ensure the calculation efficiency in the vehicle collision model,the paper proposes a method of transforming the fine model into an equivalent simplified model.The material properties and area division of the fine model are simplified and assigned to the equivalent model.The simulated peak force is in good agreement with the experimental results,which shows that the equivalent model can characterize the mechanical properties of FSW joint and meet the accuracy requirements.

关 键 词：搅拌摩擦焊 精细模型 等效模型 仿真精度 

分 类 号：U465[一般工业技术—材料科学与工程]