含中心裂纹低匹配对接接头形状参数对形状因子的影响  

Influence of joint geometric parameters on shape factor of under-matched butt joint with center crack

作　　者：王涛[1] 杨建国[1] 刘雪松[1] 方洪渊[1] 周立鹏 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [2]中广核检测技术有限公司苏州分公司,苏州215004

出　　处：《焊接学报》2012年第1期101-104,118,共4页Transactions of The China Welding Institution

摘　　要：基于有限单元法针对含中心裂纹的低匹配对接接头形状设计,以最大限度提高接头的抗断能力为目标,从断裂力学角度出发,考察了含中心裂纹的低匹配对接接头的焊缝余高高度、盖面焊道宽度、焊趾过渡圆弧半径等形状参数对其形状因子的影响.结果表明,焊缝余高高度对含中心裂纹的低匹配对接接头形状因子影响最为显著,盖面焊道宽度的影响次之,焊趾过渡圆弧半径的影响最小.选择合适的形状参数可以提高含中心裂纹低匹配对接接头的抗断能力.In order to improve the fracture resistance of under-matched butt joint,the influence of joint geometric parameters on shape factor of under-matched butt joint with center crack is studied based on the finite element method.The result shows that the reinforcement plays the most important role in shape factor of under-matched butt joint with center crack,the cover pass width has the relatively great effect on shape factor and the weld toe smooth transition radius has little effect on shape factor.The fracture resistance of under-matched butt joint with center crack can be improved by choosing appropriate joint geometric parameters.

关 键 词：低匹配对接接头 接头形状参数 中心裂纹 形状因子 

分 类 号：TG115.28[金属学及工艺—物理冶金]