ACCURATE MICRO/MACRO FIELD SIMULATION FOR COMPOSITES SUBJECT TO FIBER-MATRIX DEBONDING USING HFGMC

Abstract eng:
This paper addresses fiber-matrix debonding in composites using a recently developed micromechanics model known as the high-fidelity generalized method of cells (HFGMC). By employing a higher-order displacement field, this model supercedes it predecessor, the generalized method of cells (GMC), in terms of micro-scale field accuracy. Via inclusion of appropriate constitutive relations for inelastic deformation and fiber-matrix debonding, both HFGMC and GMC have been applied to model the transverse deformation of titanium matrix composites, which exhibit obvious effects of interfacial debonding. Results indicate that HFGMC is considerably more accurate than GMC for analysis of composites with debonding, enabling realistic predictions of composites’ transverse response.

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