丛述玲;金成;

• 1:大连交通大学材料科学与工程学院

摘要(Abstract)：

基于Voronoi算法对铝合金焊接接头进行细观组织建模,构建三维等轴晶、柱状晶区结合区域的多晶模型。结合接头初始晶粒取向,并将其赋予到多晶模型中。运用晶体塑性理论,编写用户自定义材料子程序,对焊态下及经腐蚀后的接头在拉伸状态下的细观应力分布进行数值模拟研究。结果表明:在拉伸形变的过程中,接头细观最大应力出现在柱状晶区、等轴晶结合区域,并且随着腐蚀的平均深度和表面损伤度增加,蚀坑边缘产生应力突变,其应力峰值变大,容易成为裂纹起裂的源头。

关键词(KeyWords)： 铝合金焊接接头;腐蚀;多晶模型;晶体塑性有限元;细观应力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51105049)

作者(Author): 丛述玲;金成;

Email:

DOI: 10.14024/j.cnki.1004-244x.20160824.003

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