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�������պ����ѧѧ�� 2000, Vol. 26 Issue (5) :556-560    DOI:
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Stochastic Crack Growth Approach under Corrosive Environment for Durability Analysis
ZHANG Jian-yu, LIU Ai-min, FEI Bin-jun*
Beijing University of Aeronautics and Astronautics,Dept. of Flight Vehicle Design and Applied Mechanics

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Abstract�� In order to analyze the aircraft structural reliability under corrosive environment, stochastic crack growth approach (Cor-SCGA) for durability analysis is established. Assuming the influence of the pre-corrosion in parkand the influence of corrosion in flight are independent, the fatigue quality of structure under corrosive environment has a Weibull distribution. Using a log-normal stochastic variable model to describe crack propagation, an equation for predicting the probability of crack exceedance is established. Compared with the probability fracture mechanics approach under corrosive environment (Cor-PFMA) and probability fracture mechanics approach under normal environment (Nor-PFMA), Cor-SCGA is more efficient. This approach will be better used for durability-based design.
Keywords�� structural reliability   structural life-time   corrosion fracture   durability     
Received 1999-04-09;


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�Ž���, ������, �ѱ��.��ʴ�����µ�����;��Է�������[J]  �������պ����ѧѧ��, 2000,V26(5): 556-560
ZHANG Jian-yu, LIU Ai-min, FEI Bin-jun.Stochastic Crack Growth Approach under Corrosive Environment for Durability Analysis[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2000,V26(5): 556-560
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