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《Journal of Changsha Communications University》 2000-02
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Damage Mechanical Interpretation of Classical Fatigue Empirical Formula

TANG Xue song 1, ZHENG Jian long 1, JIANG Chi ping 2 (1.Highway and Bridge Eng.Dept., Changsha Comm. Univ., Changsha 410076,China;2. Dept. of Flight Vehicle Design and Applied Mechanics, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China)  
It is thought that the classical fatigue equation is empirical and its mechanical implications are unknown. In this paper the authors study the fatigue failure of beam bending by means of damage mechanics. The amplitudes of initial undamaged stress and effective stress are used as controlling variations of damage development respectively to obtain the engineering closed solutions of fatigue crack initiation life which are equivalent to one another. The two closed solutions are also equivalent to those of the classical fatigue empirical formula. This is shown clearly that the classical fatigue empirical formula can be derived from the damage mechanical theory and its mechanical implications can be obtained consequently.
【Fund】: 交通部重点科技项目资助
【CateGory Index】: O346.2
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7 TANG Xue song 1, JIANG Chi ping 1, ZHENG Jian long 2 (1. Division 508, Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; 2.Changsha Comm. Univ., Changsha 410076, China;Stress Strain Constitutive Relation and Damage Evolution Equation for Elastic Damaged Materials[J];JOURNAL OF CHANGSHA COMMUNICATIONS UNIVERSITY;1999-04
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【Secondary References】
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1 WU Da-lin LI Wei JIA Yun-feii;Present state and perspectives of reliability enhancement test technology of vehicles[J];Environmental Technology;2006-06
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