论文部分内容阅读
A numerical simulation of stochastic damase evolution process in the condition of lowcycle fatigue loading is discussed.The relations between damage variables and micro-cracks are ob-tained by means of the micro-mechanics model of the representative volume element proposed byLemaitre and Dufailiy.The stochastic initial damage values are introduced in consideration of theinherent micro-defects in materials.The model combined with a finite element method is applied tosimulate the damage evolution process under low cycle fatigue loading.The micro-cracks on the surface of a specimen of 19Mn6 alloy steel are measured with a replica technique.The numerical resultsshow that the nor.homogeneity of damage and the localization of the fatigue failure are well shown bythe proposed simulations,and the fatigue lives are reasonably predicted.
A numerical simulation of stochastic damase evolution process in the condition of low cycle fatigue loading is discussed. Relations between damage variables and micro-cracks are ob-tained by means of the micro-mechanics model of the representative volume element proposed by Mareitre and Dufailiy. stochastic initial damage values are introduced in consideration of the inherent micro-defects in materials. model combined with a finite element method is applied tosimulate the damage evolution process under low cycle fatigue loading. micro-cracks on the surface of a specimen of 19Mn6 alloy steel are measured with a replica technique. numerical resultsshow that the nor.homogeneity of damage and the localization of the fatigue failure are well shown by the proposed simulations, and the fatigue lives are reasonably predicted.