LD10薄板随焊锤击工艺的有限元分析
Finite element analysis of LD10 welding with hammering
张勇，綦秀玲
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作者单位：辽宁工程技术大学材料科学与工程学院
中文关键字：随焊锤击；LD10薄板；焊接残余应力应变；有限元分析
英文关键字：welding with hammering, LD10 thin plate, welding residual strain and stress, finite element analysis
中文摘要：对于铝合金的焊接其焊后残余应力导致的焊接变形，尤其对于薄板的焊接其焊接变形问题更为严重。本文运用MSC. Marc大型有限元模拟软件对LD10铝合金的随焊锤击工艺进行三维模拟，为优化铝合金随焊锤击工艺的工艺参数，提供了理论依据和指导。结果说明：由于焊接热源后的锤击作用使得作用区域的金属发生了塑性延展，从而导致工件的纵向残余拉应力峰值、纵向残余弹、塑性变形量均逐渐减小。分析认为，随焊锤击能够减少焊接区因局部加热而导致的压缩塑性变形，降低了焊接残余应力，从而起到控制薄板焊接失稳变形的目的
英文摘要：The residual stress and deformation after welding for aluminum alloy is the focus of research. Especially for the thin plate, the welding deformation problem is more serious. MSC.Marc is utilized to illustrate the effect of the welding with hammering process on the welding residual stress and strain. The results show that welding residual longitudinal stress, elastic and plastic strain can be lowered for the plastic strain extension of the acted area. The loading can compensate the plastic compressed deformation that is produced by the local heating source, therefore the welding residual strain and stress can be decreased. When the residual longitudinal stress is reduced, the buckling deformation of weldment can be controlled.