Journal
COMPOSITE STRUCTURES
Volume 209, Issue -, Pages 590-605Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.11.008
Keywords
Metal-matrix composites (MMCs); Mechanical properties; Finite element analysis (FEA); Cohesive interface modelling
Categories
Funding
- National Key R&D Program of China [2017YFB0703101]
- National Natural Science Foundation of China [51701118]
- Materials Genome Initiative Center (MaGIC), SJTU
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In this article, we developed a three-dimensional multi-particle finite element model to explore the effects of particle size, morphology and interfacial strength on the elastic-plastic behavior of particle-reinforced composites under uniaxial tension. We adopted strain-gradient plasticity to evaluate the size-dependent strengthening effect on matrix. Randomly distribution of spherical or cubic particles was realized in a cubic representative cell and interface damage was described by the cohesive zone model. Numerical analysis quantified the effects of microstructural features on interface damage, load transfer and strengthening effect in matrix: the flow strength of composites increases with decreasing particle size, which is attributed to the increased size-dependent strengthening in matrix, considering that the load bearing capacity of particles is decreased simultaneously. Weaker interface results in earlier and faster development of interface damage, and as the interface damage grows to the order of 0.1, load bearing capacity of particles drops from its peak value.
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