焊接结构疲劳失效的产生原因与预防措施  

The Causes and Preventive Measures of Fatigue Failure of Welded Structures

作　　者：赵子豪[1] 刘德刚[1] 

机构地区：[1]南车青岛四方机车车辆股份有限公司高速列车系统集成国家工程实验室(南方),山东青岛266111

出　　处：《现代机械》2012年第1期64-67,共4页Modern Machinery

摘　　要：随着焊接结构的广泛应用,焊接结构的疲劳失效问题越来越受到关注。研究焊接结构疲劳失效的产生原因以及预防措施具有重要意义。本文介绍了应力集中、焊接残余应力、焊接缺陷和金相组织发生改变等引起焊接结构疲劳失效的常见原因,阐述了针对各种原因的预防焊接结构疲劳失效的若干措施,以提高焊接结构的抗疲劳破坏能力。With the extensive use of welded structures, fatigue failure of welded structures is a growing concern. It is important to study the causes and preventive measures of fatigue failure of welded structures. In this thesis, the common causes are described, which include the stress concentration, welding residual stress, welding defects and microstructure change. It is explained that a number of the measures that can prevent fatigue failure of welded structures in order to improve the fatigue resistance capabilities of welded structures.

关 键 词：焊接结构 疲劳失效 应力集中 残余应力 

分 类 号：TG405[金属学及工艺—焊接]