1 Department of Wind Energy, Technical University of Denmark 2 Composites and Materials Mechanics, Department of Wind Energy, Technical University of Denmark 3 Risø National Laboratory for Sustainable Energy, Technical University of Denmark
The influence of interface strength and loading conditions on the mechanical behavior of the metal-matrix composites is investigated in this paper. A program is developed to generate automatically 2D micromechanical Finite element (FE) models including interface, in which both the locations and dimensions of Silicon-Carbide (SiC) particles are randomly distributed. Finite element simulations of the deformation and damage evolution of SiC particle reinforced Aluminum (Al) alloy composite are carried out for different microstructures and interphase strengths under tensile, shear and combined tensile/shear loads. 2D cohesive element is applied to describe the fracture and failure process of interphase, while the damage models based on maximum principal stress criterion and the stress triaxial indicator are developed within Abaqus/Standard Subroutine USDFLD to simulate the failure process of SiC particles and aluminum alloy matrix, respectively. A series of computational experiments are performed to study the influence of particle arrangements, interface strengths and loading conditions of the representative volume element (RVE) on composite stiffness and strength properties. © 2013 Elsevier Ltd.
Materials and Design, 2013, Vol 51, p. 438-447
Finite element method; Fracture; Mechanical properties; Microstructure; Particle reinforced composites; Silicon carbide; Metallic matrix composites
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