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Effect of Interfacial Debonding on the Material Properties of Brittle Matrix Composites  

염영진 (울산대학교 기계 자동차공학부)
진민철 (세종공업㈜ 기술연구소)
Publication Information
Composites Research / v.16, no.1, 2003 , pp. 42-49 More about this Journal
Abstract
Brittle matrix composites often have interfacial debonding between the fiber and matrix which may lead to strength and stiffness degradation. The effect of interfacial debonding and fiber volume fraction on the mechanical properties of composite material were studied by using finite element method. Firstly, the modelling of fiber and matrix constituting the composite material was simplified under some assumptions. Traction and displacement continuity conditions were imposed along the boundary of adjacent representative volume elements. In order to obtain the effective material properties of composite material, stiffness constants were inverted. Numerical values of longitudinal moduli in case of perfect bonding were compared with theoretical values obtained by rule of mixtures and yielded consistency. Material properties of composite with large debonding an81e were found to decrease even though the fiber volume fraction increased.
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