摘要
本文研究了结构细节对16Mn钢对焊接头疲劳寿命的影响并提出了估算对焊接头疲劳寿命的方法。结果表明,若保留焊缝余高,采用不等厚或不等宽钢板对接,不会影响对焊接头的疲劳强度;去除焊缝余高或将焊缝设计在最大剪应力平面内可明显改善对焊接头的疲劳性能。在不含类裂式缺陷时,焊接接头的疲劳寿命可分成裂纹起始寿命和裂纹扩展寿命两阶段分别加以估算。
In this paper, the effect of structural details on fatigue crack initiation and propagation in butt welds of 16Mn steel is investigated and a procedure to predict fatigue life of the butt welds is outlined. The results indicate that the specimens butt-welded by two piece of steel plates with different width or different thickness have almost the same fatigue life as those welded by two piece of the steel plates with equal width and equal thickness, if the weld reinforcement is not machined off. The fatigue resistance of the butt welds can be improved by means of removing the weld reinforcement and designing the weld in the maximum shear stress plane. When there exists no crack-like defect, the fatigue life of the butt wcJds is the sum of crack initiation life and crack propagation life, which should be predicted respectively.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1993年第2期117-124,共8页
Transactions of The China Welding Institution
关键词
焊接接头
疲劳寿命
结构
16MN钢
wcldcd joint
crack initiation and propagation
fatigue life prediction
