Abstract
This work improved upon an effective micromechanical method to analyze the mechanical properties of three-dimensional particle-reinforced composites (PRC) with consideration of the interfacial debonding. By incorporating the interfacial debonding model, Mises yield criterion, and failure theory, the effects of particle shape, particle volume fraction, and loading condition on the mechanical properties are studied. A comparison of simulation results obtained from the established method and published experimental data is presented. Good consistency can be found in this study. On this basis, the interfacial cohesive strength and particle shape effects on the biaxial failure strength of particle-reinforced composites with interfacial debonding were also studied. The results revealed that both interfacial strength and particle shape have significant effects on biaxial tensile failure strength. However, the different interfacial strength influence on failure envelope can hardly be discerned in biaxial compressive loading.
Highlights
With the rapid development of modern industrial technology, particle-reinforced metal matrix composites, which combine the ductility and toughness of metal phase with the high strength of the reinforced particles, have been widely used due to their high specific strength and high specific rigidity [1,2,3,4]
It is important for designers to consider some certain factors including the particle volume fraction (PVF), interphase between particles and matrix, and particle size when determining the mechanical properties
By incorporating the dislocation punched zone model, cohesive zone model, and the Taylor-based nonlocal theory, an enhanced finite element method (FEM) was proposed by Shao et al [28] to investigate the effect of interfacial debonding in the particle-reinforced metal matrix composites
Summary
With the rapid development of modern industrial technology, particle-reinforced metal matrix composites, which combine the ductility and toughness of metal phase with the high strength of the reinforced particles, have been widely used due to their high specific strength and high specific rigidity [1,2,3,4]. By incorporating the dislocation punched zone model, cohesive zone model, and the Taylor-based nonlocal theory, an enhanced finite element method (FEM) was proposed by Shao et al [28] to investigate the effect of interfacial debonding in the particle-reinforced metal matrix composites. The present study aimed to conduct an in-depth study of the relations between macroscopic mechanical properties and intrinsic microstructure parameters (particle shape, particle volume fraction), as well as extrinsic parameters (strain rate) of the PRC with consideration of interfacial debonding. To this end, the periodic unit cell was employed.
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