Abstract
The influence of the shape and spatial distribution of reinforced particles on strength and damage of metal matrix composite (MMC) is investigated through finite element method under uniaxial tensile, simple shear, biaxial tensile, as well as combined tensile/shear loadings. The particle shapes change randomly from circular to regular n-sided polygon (3 ≤ n ≤ 10); the particle alignments are determined through a sequentially random number stream and the particle locations are defined through the random sequential adsorption algorithm. The ductile failure in metal matrix and brittle failure in particles are described through damage models based on the stress triaxial indicator and maximum principal stress criterion, respectively, while the debonding behavior of interface between particles and matrix is simulated through cohesive elements. The simulation results show that, under different loadings, interface debonding is the dominated failure mechanism in MMCs and plastic deformation and ductile failure of matrix also play very important roles on the failure of MMCs.
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Acknowledgments
The work was financially supported by the Fundamental Research Funds for the Central Universities (No. NE2014401) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
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Qing, H. Finite Element Analysis of the Microstructure–Strength Relationships of Metal Matrix Composites. Acta Metall. Sin. (Engl. Lett.) 27, 844–852 (2014). https://doi.org/10.1007/s40195-014-0089-4
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DOI: https://doi.org/10.1007/s40195-014-0089-4