Paper Title:

Analysis of Crack-Tip Field of Particulate-Reinforced Composites Taking Account of Particle Size Effect and Debonding Damage

Periodical Key Engineering Materials (Volumes 452 - 453)
Main Theme Advances in Fracture and Damage Mechanics IX
Edited by A. Saimoto and M.H. Aliabadi
Pages 625-628
DOI 10.4028/www.scientific.net/KEM.452-453.625
Citation Tomoyuki Fujii et al., 2010, Key Engineering Materials, 452-453, 625
Online since November, 2010
Authors Tomoyuki Fujii, Keiichiro Tohgo, Yu Itoh, Daisuke Kato, Yoshinobu Shimamura
Keywords Crack-Tip Field, Debonding Damage, Finite Element Analysis (FEA), Incremental Damage Theory, Micro-Mechanics, Particulate-Reinforced Composites, Size Effect
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Abstract

This paper deals with an analysis of a crack-tip field of particulate-reinforced composites which can describe the evolution of debonding damage, matrix plasticity and particle size effect on deformation and damage. Numerical analyses were carried out on a crack-tip field in elastic-plastic matrix composites reinforced with elastic particles by using a finite element method developed based on an incremental damage theory. The particle size effect on damage is described by a critical energy criterion for particle-matrix interfacial debonding. The effect of debonding damage on a crack-tip field is discussed based on numerical results. The debonding damage initiates and progresses ahead of a crack-tip. The stress distribution shifts downward in the debonding damage area. It is concluded that a crack-tip field is strongly affected by debonding damage.