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�������պ����ѧѧ�� 2002, Vol. 28 Issue (1) :113-115    DOI:
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Research on Life Reliability of Fatigue Crack Propagation
LUO Yi1, HUANG Pei-yan1, LIU Wen-ting2*
1. South China University of Technology, College of Traffic and Communication;
2. Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

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Abstract�� By analyzing stochastic of effects on the fatigue crack propagation life, a few models on life reliability of fatigue crack propagation in common use were compared. On the base, a kind of reliability model, so called the reliability model of fatigue crack propagation life corresponding to fracture toughness, was proposed in this paper. The model is based on the distributions of fatigue crack propagation life & fracture toughness, which were generally accepted as Weibull distribution or logarithmic normal distribution. The paradox about the distribution of crack size was avoided, especially for three dimensional cracks, two-directional crack sizes were included in the maximum stress strength factor in front of the crack. It was suitable to the probabilistic damage tolerance evaluation of structures including all kinds of cracks or faults.
Keywords�� fatigue life   crack propagation   reliability   fracture toughness     
Received 2000-07-11;
Fund:

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����, ������, ���ĬE.������չ������ȫ�ɿ��Է���ģ���о�[J]  �������պ����ѧѧ��, 2002,V28(1): 113-115
LUO Yi, HUANG Pei-yan, LIU Wen-ting.Research on Life Reliability of Fatigue Crack Propagation[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(1): 113-115
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