摘要
激光焊接铝合金过程非常复杂,针对铝合金激光焊接过程的实际情况建立了有限元模型,试图通过有限元模拟的方法揭示激光焊接过程的特点。建模过程中激光热源模型考虑了表面热源和体热源,分别反映等离子体的影响和激光束的作用。利用有限元模型分析了激光焊接过程中小孔的形成和长大过程,同时将模拟结果与试验结果进行比较,模拟出的焊缝宏观截面形状与试验结果表现出较好的一致性,证明所建立的有限元模型是合理的。有限元模型可以用来预测实际焊接过程中不同焊接工艺参数下焊缝的成形情况,可以为激光焊接工艺参数的选择提供理论指导和参考,更好地发挥铝合金激光焊接的优势。
Based on the specific laser welding process of aluminum alloy,two kinds of heat sources were used in this calculation which could reflect effect of laser plasma and laser beam during laser welding process.The formation and development of keyhole has been analyzed by FEM and the calculation has coincidence with the result of laser welding experiment.The model is reasonable and welding seams can be predicted,by this model thus it helps to choose appropriate parameters for laser welding of aluminum alloy.It ma...
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第4期97-100,118,共5页
Transactions of The China Welding Institution
基金
上海市科学技术委员会基金资助项目(06DZ22102)
关键词
激光焊接
铝合金
有限元
laser welding
aluminum alloy
finite element
