Hits:

Indexed by:Journal Papers

Date of Publication:2015-11-01

Journal:INTERNATIONAL JOURNAL OF FATIGUE

Included Journals:SCIE、EI、Scopus

Volume:80

Page Number:349-356

ISSN No.:0142-1123

Key Words:High temperature; Short fatigue cracks; Life prediction; Voronoi-polygons; Microstructural simulation

Abstract: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.