CAJ | 학술논문

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。
재한접접두처，유우궤하적불련속조성료국부적응력집중，대기피로강도평고적연구시십분필요적。문장제출채용기이강도（as）래계산접두처적궤하응력，병기우N-SIF방법분석료불동궤하척촌하십자접두적피로강도。결과표명해수정공식가이십분간편지평고출한접접두처적피로강도。
It is necessary to better understand the fatigue strength evaluation of welded joints with con-sideration of the discontinuous geometry factors that produce locally high stresses. This paper pro-posed 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 ad-vantage in simplified fatigue strength estimation for welded joints.