Release Time:2019-03-09  Hits:

Indexed by: Journal Papers

Date of Publication: 2015-11-01

Journal: INTERNATIONAL JOURNAL OF FATIGUE

Included Journals: Scopus、EI、SCIE

Volume: 80

Page Number: 349-356

ISSN: 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.