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《Chinese Journal of Applied Mechanics》 2000-04
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Damage Mechanical Analysis for Fatigue Failure Process of Bituminous Mixtures

Tang Xuesong Jiang Chiping Zheng Jianlong (Beijing University of Aeronautics and Astronautics, 100083) (Changsha Communications University, 410076)  
This paper studies the fatigue failure of bituminous mixtures based on the conti nuum damage mechanics. For the problem of cantilever fatigue failure of bitumino us mixtures, the evolution equations of stress, strain and damage fields are der ived, and the engineering closed solution of fatigue crack initiation life is ob tained. A characteristic element failure model is developed to predict the fatig ue crack propagation life based on the damage characteristics of bituminous mixt ures. The description and analysis of two periods in fatigue process (crack init iation and propagation) are unified into the damage mechanical framework. The cr ack initiation and propagation lives are predicted respectively. The stiffness a ttenuation and displacement evolutions during fatigue damage process are calcula ted. The theoretical predictions are in good agreement with the experimental res ults.
【Fund】: 交通部人才基金!95-06-0-34
【CateGory Index】: U411
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