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

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.