焊接接头疲劳评定的局部法研究现状

Research progress on fatigue assessment of welded joints by local approaches

关键词:  焊接接头  疲劳评定  局部法

Key words:  welded joints  fatigue assessment  local approaches

摘要:

局部法(Local Approach)是近年来发展起来的焊接接头疲劳评定的一种新方法。目前已提出了多种焊接接头疲劳评定的局部准则,如缺口应力强度因子法(N-SIF)、等效应力强度因子法(E-SIF)、临界距离法(CDM)包括点(PM)、线(LM)和面(AM)法、临界面法及体积法。文中对这些局部法的基本原理、分析步骤及影响因素进行了介绍,综述了局部法研究现状并对目前局部法研究存在的问题进行了讨论。

Abstract:

The local approach is one of the most important methods developed in recent years for fatigue assessment of welded joints.Various local fatigue criteria for fatigue assessment are developed in recent years,such as notch stress intensity factor (N-SIF),equivalent stress intensity factor (E-SIF),critical distance method (CMD) which includes point method (PM),line method (LM) and area method (AM),critical plane method (CPM) and volumetric method (VM).The principles,procedures and effect factors about the local approaches were introduced,the present research situation was reviewed and the existed problems for local approaches were discussed in this paper.