EFFECT OF WELD PROCESS ON EARLY GROWTH OF FATIGUE CRACKS IN STEEL T-JOINTS

被引：17
|
作者：
OTEGUI, JL
MOHAUPT, UH
BURNS, DJ
机构：
[1] UNIV WATERLOO,DEPT MECH ENGN,WATERLOO N2L 3G1,ONTARIO,CANADA
[2] MDT ENGN,WATERLOO N2L 5V4,ONTARIO,CANADA
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 1991年 / 13卷 / 01期
关键词：
MANUAL WELDS; AUTOMATIC WELDS; SURFACE CRACKS; CRACK INITIATION; PROPAGATION; COALESCENCE;
D O I：
10.1016/0142-1123(91)90127-K
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The propagation of fatigue cracks from weld defects at the toes of manual and automatic T-plate joints in a structural steel was studied in this work. It was found that the evolution of aspect ratios (a/c) and surface growth of cracks are dependent on the mismatch between the planes of adjacent growing surface cracks, which determined the depths at which these toe cracks coalesced. Crack mismatch and depth to coalescence were found to be much smaller in the case of automatic welds, which also showed shorter fatigue initiation and propagation lives. An LEFM model of crack growth is presented, in which the parameters defining early fatigue growth are determined.
引用
收藏
页码：45 / 58
页数：14
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