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《Chinese Journal of Applied Mechanics》 2008-03
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Simulation to Three-dimensional Fatigue Crack Growth Life of Torsion Bar in Self-propelled Gun

Yi Dangxiang1Liu Chunhe1Feng Yanwen1Wang Jiancheng2L Guozhi3(Qing-he building D8, 100085, Beijing, China)1 (School of Ordnance,430000, Wuhan, China)2(School of Aeronautics, Northwest Polytechnical University, 710072, Xi’an, China)3  
For three-dimensional surface crack propagation under fatigue load spectrum, dual boundary element method is adopted to solve the stress and strain field along the crack fronts. And the propagation size, growth direction and stress intensity factors along the crack fronts are obtained following. Forman law,minimal strain energy density criterion and Elber model. According to the change of crack geometry for each incremental crack extension, the crack surface is newly redivided and the above stress and strain are iteratively evaluated to simulate the three-dimensional surface crack propagation and predict fatigue lives.
【CateGory Index】: O346.1
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1 YI Dang-xiang1,2,LIU Chun-he2,Lü Guo-zhi1,LI Xin-jun2(1.School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072, Shaanxi,China;2.Qinghe Building D8,Beijing 100085,China);Fatigue Life Simulation of Key Components of Running Gear for a Self-propelled Gun[J];Acta Armamentarii;2007-02
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