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�������պ����ѧѧ�� 2006, Vol. 32 Issue (08) :899-902    DOI:
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Reliability analysis on structure with multiple site damage
Wang Chuansheng, Zhang Jianyu, Bao Rui, Fei Binjun*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ����ƣ��ͳ��ѧ�������ѧ�Ļ���,�������еķɻ���ϸ�ڽṹ������,���һ�ֶ�������ɻ��ṹ�����ಿλ����(MSD,Multiple Site Damage)�����Եķ���.�÷������˷ɻ��ṹ����MSD�����Եļ���,Ϊ�ɻ��ṹ�İ�ȫ�������ṩ����.�÷�����Ϊ��ϸ�ڵ�������������������̬�ֲ��������̬�ֲ�.���ڶ�ϸ�ڵķɻ��ṹ,��ijһʱ��,��2����2������ϸ����������ʱ,����Ϊ�ýṹ������MSD.�����˾���ķ������ܺ������Ƶ�,��������һ������ļ���ʾ��,�õ�MSD����������Ӧ��ˮƽ�Ĺ�ϵ����.����������,�÷����������,�Ϸ���ʵ�����,���ڹ���Ӧ��.
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Abstract�� A quantitative analysis method on the occurrence probability of MSD(multiple site damage)was presented based on the theory of statistics in fatigue and fracture mechanics and the existing experimental results. It predigested the calculation for the occurrence probability of MSD and provided reference for the evaluation of fatigue life of aircraft structures. It assumed that the initiating life of single crack follows logarithmic normal distribution or normal distribution according to existing research and experimental results. The assumption was rational and it didn′t affect the foundation of calculation and theory. For the structures with multiple details, MSD in the structure happened when two or more than two details emanated cracks at certain time. According to these, method and formula were proposed. A numerical example and corresponding stress-MSD probability curve were given for the proposed approach. The result indicates that the method is reasonable and can be used in engineering.
Keywords�� structure   fatigue   reliability   crack propagation   crack initiation     
Received 2005-10-14;
About author: ����ʤ(1977-), ��, ������������, ��ʿ��, wang12wang12@sohu.com.
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����ʤ, �Ž���, ����, �ѱ��.�ɻ��ṹ�ಿλ���˷����Ŀ����Է���[J]  �������պ����ѧѧ��, 2006,V32(08): 899-902
Wang Chuansheng, Zhang Jianyu, Bao Rui, Fei Binjun.Reliability analysis on structure with multiple site damage[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(08): 899-902
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