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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：INTERNATIONAL JOURNAL OF FATIGUE

收录刊物：SCIE、EI、Scopus

卷号：80

页面范围：349-356

ISSN号：0142-1123

关键字：High temperature; Short fatigue cracks; Life prediction; Voronoi-polygons; Microstructural simulation

摘要：This paper dealt with fatigue behavior simulation based on ferrite-pearlite microstructure modeled by correctional Voronoi-polygons. The model took grain size, grain orientation and the percentage of pearlite and ferrite into consideration. The basal energy was proposed to represent the inherent energy for slip-band and grain boundary to cracking. The driving force for crack initiation and propagation caused by load condition was considered as the energy increment of slip-band and grain boundary. The fatigue behavior including crack initiation, propagation, coalescence and interference were simulated based on Monte Carlo method. The simulation results show a satisfying agreement with the experimental ones. (C) 2015 Elsevier Ltd. All rights reserved.