穿孔型层流等离子弧焊接残余应力的数值模拟
Numerical Simulation of Residual Stress of Plasma Arc Welding with Keyhole Laminar Flow
陈庆伟， 姚 进
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作者单位：（四川大学 制造科学与工程学院, 四川 成都 610065）
中文关键字：等离子焊接； 穿孔； 数值模拟
英文关键字：plasma welding; perforation; numerical simulation
中文摘要：根据层流等离子体射流的特性，建立了焊接穿孔型热源模型，并采用Abaqus有限元分析软件对穿孔型层流等离子弧焊残余应力进行了数值模拟。结果表明，层流等离子体射流焊后应力要比湍流等离子体射流小很多，为以后的研究奠定了理论基础。
英文摘要：Based on the characteristics of laminar plasma jet, a welding heat source model was established, and the residual stress of plasma arc welding with keyhole laminar flow was numerically simulated using Abaqus finite element analysis software. The results show that the welding stress of laminar plasma jet is much smaller than that of turbulent plasma jet.