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Title of Journal: Acta Mech Sin

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Abbravation: Acta Mechanica Sinica

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The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences

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10.1007/bf00761500

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1614-3116

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Bivariable damage model for fatigue life predicti

Authors: Miao Zhang QingChun Meng Xing Zhang WeiPing Hu
Publish Date: 2011/05/16
Volume: 27, Issue: 3, Pages: 416-425
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Abstract

Based on the theory of continuum damage mechanics a bivariable damage mechanics model is developed which according to thermodynamics is accessible to derivation of damage driving force damage evolution equation and damage evolution criteria Furthermore damage evolution equations of time rate are established by the generalized Drucker’s postulate The damage evolution equation of cycle rate is obtained by integrating the time damage evolution equations and the fatigue life prediction method for smooth specimens under repeated loading with constant strain amplitude is constructed Likewise for notched specimens under the repeated loading with constant strain amplitude the fatigue life prediction method is obtained on the ground of the theory of conservative integral in damage mechanics Thus the material parameters in the damage evolution equation can be obtained by reference to the fatigue test results of standard specimens with stress concentration factor equal to 1 2 and 3

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