CAJ | 학술논문

分析了用传统的强度理论设计方法来校核含裂纹体的构件强度存在的问题。重点研究了平板厚度和裂纹位置分布及尺寸对裂纹尖端应力强度因子的影响，结果表明：沿垂直方向应力强度因子分布呈现中间小两边大，提高构件沿裂纹扩展方向的长度，应力强度因子的分布呈现截止区与局部增大区，而提高构件沿垂直于裂纹扩展方向的长度，应力强度因子的分布只出现截止区，沿厚度方向应力强度因子分布规律呈现表层小于中心层，其裂纹尖端的扩展位移为椭圆形。通过裂纹多因素分析为工程构件的裂纹扩展断裂提供理论性的指导。
분석료용전통적강도이론설계방법래교핵함렬문체적구건강도존재적문제。중점연구료평판후도화렬문위치분포급척촌대렬문첨단응력강도인자적영향，결과표명：연수직방향응력강도인자분포정현중간소량변대，제고구건연렬문확전방향적장도，응력강도인자적분포정현절지구여국부증대구，이제고구건연수직우렬문확전방향적장도，응력강도인자적분포지출현절지구，연후도방향응력강도인자분포규률정현표층소우중심층，기렬문첨단적확전위이위타원형。통과렬문다인소분석위공정구건적렬문확전단렬제공이론성적지도。
Analyzes the problem that existed in checking the strength of the part with crack using traditional design method. According to the displacement extrapolation method,The paper analyzes the kind of crack length, thickness and plate size have effect on the stress intensity factor. the result shows that: The stress intensity factor in different crack location present the distribution rules of small middle big at both.The distribution of stress intensity factor occur cut-off region and part of increasing region when increase the frame length along the direction of crack growth. It occur only cut-off region when increase the framer length along vertical the direction of crack growth.Along the direction of thinness, the distribution of stress intensity factor present the rules of the big central position the small surface position,while the displacement of crack tip growth is ellipse.It provides theoretical guidance to crack extension fracture in engineering components by multiple factors analysis.