摘要
基于ANSYS建立了三维有限元模型,采用APDL函数控制单元沿设定轨迹的生死,研究了3种环形路径和2种基板对残余应力的影响,比较分析了不同条件下残余应力及其分布规律。结果表明:同向路径的应力水平最低,加槽基板能够有效地降低残余应力,底部第一主应力平均减少29.86%。基板变形试验与模拟结果吻合,证明了模型的正确性。
A 3D finite model of arc additive manufacturing cylindrical work piece was established based on ANSYS to decrease residual stress. The techniques of live and death elements were controlled along the trajectory by APDL function. Three kinds of path and two different substrates on the residual stress under various conditions were studied in the paper. The results showed that the same direction path had the lowest level of stress compared with other paths and the substrate with groove could effectively reduce the residual stress, the first stress average reduced by 29.86%. Experiment results of substrate deformation matches simulation consequence, which proved the correctness of the model.
出处
《焊接技术》
北大核心
2014年第5期7-10,1,共4页
Welding Technology
基金
国家自然科学基金资助项目(51175203)
国家863项目(2007AA04Z142)
关键词
电弧增材成形
残余应力
有限元模拟
成形路径
基板形状
arc additive manufacturing,residual stress,finite element simulation,path,substrate
