基于切口应力强度理论的横向角接焊接接头的疲劳强度评估（英文）  

Fatigue Strength Evaluation of Transverse Fillet Welded Joints Based on Notch Stress Strength Theory

作　　者：谌伟[1] 严仁军[1] Nigel BARLTROP 杨平[1] 刘恩骞 秦恺[1] 

机构地区：[1]武汉理工大学交通学院船舶与海洋工程系,高速船舶工程教育部重点实验室,武汉430063 [2]斯特莱斯克莱德大学船舶与海洋工程系,英国格拉斯哥C4 0LZ

出　　处：《船舶力学》2015年第9期1116-1125,共10页Journal of Ship Mechanics

基　　金：Supported by National Natural Science Foundation of China(Grant No.51479153);the Fundamental Research Funds for the Central Universities(No.2013-JL-007)

摘　　要：在焊接接头处,由于几何的不连续造成了局部的应力集中,对其疲劳强度评估的研究是十分必要的。文章提出采用奇异强度(as)来计算接头处的几何应力,并基于N-SIF方法分析了不同几何尺寸下十字接头的疲劳强度。结果表明该修正公式可以十分简便地评估出焊接接头处的疲劳强度。It is necessary to better understand the fatigue strength evaluation of welded joints with consideration of the discontinuous geometry factors that produce locally high stresses. This paper proposed a new method of determining geometric stress at the corner by using the singularity strength ‘as ＇. The fatigue strength of cruciform joints with different geometries are summarized in a single scatter band by the N-SIF method. The results show that the proposed method has the additional advantage in simplified fatigue strength estimation for welded joints.

关 键 词：十字接头 奇异强度(as) 切口应力强度因子(N—SIF) 疲劳强度 

分 类 号：U663.2[交通运输工程—船舶及航道工程]