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Abstract Fatigue failure is one of the most common failure modes of metal materials and structures. In this paper, a modified low cycle fatigue damage law is presented, based on the continuum damage mechanics and energy principle, which considers the effects of plastic hardening and microdefects closure into damage evolution. To predict the fatigue failure of metal materials, the modified damage model is incorporated into the commercial finite element platform ABAQUS/ Explicit through a user material subroutine UMAT. In addition, the validity and applicability of this model are examined by comparing the numerical results with the experimental data of aluminum alloy 7050-T7451.
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Received: 12 November 2012
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2013, Vol. 34 
