为了提高CFRTP/不锈钢激光焊接过程数值模拟的准确性, 在考虑界面接触热导率对焊接温度场影响的情况下, 建立了CFRTP/不锈钢激光焊接热接触有限元模型, 利用ANSYS软件对温度场进行了数值模拟, 并分别讨论了激光功率、焊接速度、夹具压力等不同工艺参数对接头熔宽及温度场的影响规律。结果发现, 较传统模型而言, 热接触模型可将接头熔宽计算值的相对误差从17.8%降低至6.7%, 更为接近实际, 可用来指导试验及工业生产。

In order to improve the accuracy of numerical simulation of CFRTP/stainless steel laser welding process, the thermal contact finite element model is established considering the influence of interface contact thermal conductivity on the welding temperature field.The temperature field was numerically simulated by ANSYS software. The influence of process parameters on weld width and temperature field was studied. The results show that the relative error of the weld width prediction value can be reduced from 17.8% of the traditional model to 6.7% using this model.It is closer to reality and can be used to guide test and industrial production.