某雷达连接杆焊接温度场及残余应力分析  

Analysis of welding temperature field and residual stress of radar connecting rod

作　　者：李向博[1] 李萍[1] 徐杰[1] 薛克敏[1] 刘雨生[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《塑性工程学报》2016年第3期178-182,共5页Journal of Plasticity Engineering

基　　金：安徽省自然科学基金资助项目(1308085JGD02)

摘　　要：以长轴薄壁连接杆为研究对象,采用MARC有限元软件对连接杆的焊接过程进行数值模拟,分析不同焊接热输入对温度场、残余应力及变形的影响规律。结果表明,焊接热输入由5 600J·mm-1减小到2 800J·mm-1,残余应力及变形均显著增加,纵向残余应力增加17%,横向残余应力增加33.9%,变形量增加63.5%。焊接实验结果与模拟结果吻合,验证了模拟结果的准确性,对焊接变形的预测及控制具有重要意义。The long axis of thin-walled connecting rod, welded by connected block and hollow rod, is the crucial fitting for connection and support on radar. The numerical simulation of the welding process of connecting rod was firstly conducted through the finite element software MARC,the effects of different welding heat input factors on the temperature field, residual stress and deformation were analyzed and then the welding experiment was further carried out. The results show that, reducing the welding heat input from 5 600J ·mm-1 to 2800J ·mm-1 , both the residual stress and the deformation increase significantly, viz. , the longitudinal stress increases 17 %, the horizontal stress increases 33.9%, and the deformation increases 63.5%. Finally, the experimental results agree with the simulation results, and the study is of significance in prediction and controlling of the welding deformation.

关 键 词：连接杆 数值模拟 温度场 残余应力 变形 

分 类 号：TG444.1[金属学及工艺—焊接]