This Article Full Text (PDF) All Versions of this Article: 1056789508091563v1 18/6/533    most recent References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Scopus Google Scholar Articles by Jain, J. R. Articles by Ghosh, S. Social Bookmarking                         What's this?

Damage Evolution in Composites with a Homogenization-based Continuum Damage Mechanics Model

Computational Mechanics Research Laboratory Department of Mechanical Engineering The Ohio State University, Columbus, OH 43210, USA

Somnath Ghosh

Computational Mechanics Research Laboratory Department of Mechanical Engineering The Ohio State University, Columbus, OH 43210, USA, ghosh.5{at}osu.edu

This paper develops a 3D homogenization-based continuum damage mechanics (HCDM) model for fiber reinforced composites undergoing micromechanical damage. Micromechanical damage in the representative volume element (RVE) is explicitly incorporated in the form of fiber—matrix interfacial debonding. The model uses the evolving principal damage coordinate system as its reference in order to represent the anisotropic coefficients. This is necessary for retaining accuracy with nonproportional loading. The material constitutive law involves a fourth order orthotropic tensor with stiffness characterized as macroscopic internal variable. Damage in 3D composites is accounted for through functional forms of the fourth order damage tensor in terms of macroscopic strain components. The HCDM model parameters are calibrated by using homogenized micromechanical (HMM) solutions for the RVE for a few strain histories. The proposed model is validated by comparing the CDM results with HMM response of single and multiple fiber RVEs subjected to arbitrary loading history. Finally the HCDM model is incorporated in a macroscopic finite element code to conduct damage analysis in a structure. The effect of different microstructures on the macroscopic damage progression is examined through this study.

Key Words: continuum damage mechanics • homogenization • interfacial debonding • cohesive zone element • principal damage coordinate system.

This version was published on August 1, 2009

International Journal of Damage Mechanics, Vol. 18, No. 6, 533-568 (2009)
DOI: 10.1177/1056789508091563


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?