王正天,江淑园,陈益平,熊震宇,胡德安,程东海

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

利用ABAQUS有限元软件对镁/钢异种金属激光焊进行数值模拟,研究焊接过程中温度场及应力场的分布规律,对比分析模拟结果与试验结果并进行验证,从热传递角度分析添加镍箔中间层对镁钢搭接激光焊的影响,对其进行温度场和应力场模拟。结果表明:模拟结果与镁钢激光焊的试验结果较为吻合,镍中间层减缓了钢侧向镁侧的热传递,使镁侧温度梯度减小;应力场模拟结果表明钢侧与焊缝中心线上的残余应力以拉应力为主,垂直于焊缝方向,钢侧与镁侧焊缝及热影响区域的残余应力以拉应力为主;在远离焊缝区域逐渐从拉应力转变为压应力,镁侧的应力转变趋势比钢侧较为缓和;在添加镍箔后,镁侧焊缝整体残余应力集中情况明显改善,应力过渡趋势减缓。

关键词(KeyWords)： 激光焊;ABAQUS软件;数值模拟;温度场;应力场

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51965045)

作者(Author): 王正天,江淑园,陈益平,熊震宇,胡德安,程东海

DOI: 10.13289/j.issn.1009-6264.2021-0039

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