基于Miner定律的T型焊接接头疲劳寿命研究  

Research on Fatigue Life of T-shaped Welded Joint Based on Miner Rule

作　　者：张晓飞[1,3] 李良碧[2,3] 

机构地区：[1]镇江船艇学院工程系,江苏镇江212003 [2]江苏现代造船技术有限公司,江苏镇江212003 [3]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《军事交通学院学报》2013年第1期91-94,共4页Journal of Military Transportation University

摘　　要：T型焊接接头是焊接结构中常见的一种接头形式，在交变载荷及自身缺陷的影响下容易发生疲劳断裂。针对EH36钢中厚板T型焊接接头疲劳寿命进行有限元分析，并参照相关疲劳估算公式进行验证。研究发现，T型焊接接头在承受交变载荷作用时，最大拉伸应力位于焊趾处，且疲劳破坏也首先在焊趾处发生。T-shaped welded joint is a common joint of welding structure, and it is prone to fatigue fracture by the effects of alternating loads and defects. This paper applied the finite element analysis of T-shaped welded joint for fatigue life in the light of the EH36 steel plate, and verified the test results of the formula. Research shows that,T-shaped welded joint bears alternating load during its working, the stretched stress of welded toes is the maximal stretched stress, and the fatigue damage firstly appears at the welded toes.

关 键 词：T型焊接接头 疲劳寿命 热点应力 Miner定律 有限元分析 

分 类 号：TG407[金属学及工艺—焊接]