利用双椭球形热源模型研究了SUS310不锈钢的三维焊接温度场,并与实验测量进行了比较.在计算温度场的基础上,重点研究了材料在凝固裂纹敏感温度区间内,焊缝金属应变场和位移场的动态场演变过程,得到了10 mm厚板的凝固裂纹驱动力曲线,并利用动态单元再生方法,消除了焊接凝固过程对应变场的影响.模拟计算得到的驱动力曲线与前人实验测量的凝固裂纹阻力曲线进行了比较,初步预测了SUS310不锈钢凝固裂纹敏感性.
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