薄板焊接残余应力尺寸效应  

Effect of specimen dimension on welding residual stresses

作　　者：周建新[1] 徐宏[1] 王俊胜[2] 李栋才[3] 张莉[1] 刘阿龙[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]辽河石油勘探局油建一公司,辽宁盘锦124010 [3]西安石油大学材料系,西安710065

出　　处：《焊接学报》2006年第3期96-100,共5页Transactions of The China Welding Institution

摘　　要：利用ANSYS大型有限元软件对对接薄板焊接残余应力的大小和分布进行了计算,得出了尺寸因素对焊接残余应力的影响规律,特别是过渡板宽、板长对焊接残余应力的影响,分析过程中考虑了材料的物理性能及力学性能随着温度的非线性变化以及金属的熔化潜热,使数值模拟结果尽量接近实际值。最后理论计算与试验结果相比较,结果是基本吻合的,所得结果可以进行残余应力预测。The magnifude and the distribution of welding residual stress of butt thin plates were calculated by means of the large-scale finite element method software ANSYS,and the effect of plate length and plate width on welding residual stress was obtained,especially the effect of the middle-sized plate and narrow plate on welding residual stress.The results show that when the weld length is less than 100 mm the longitudinal residual stress of different width plate is the same,and all kinds of plates belong to wide plate.With the increment of the weld length the distribution of the residual stress gradually transfer to middle-sized plate and narrow plate.The calculated resuls was compared with the experimental results,and the results were identical.The acquired results may be used to predict the welding residual stresses.

关 键 词：焊接 残余应力 有限元方法 尺寸效应 

分 类 号：TG404[金属学及工艺—焊接]