Abstract

A new voronoi representative volume element (RVE) model with Cohesive Zone Models is advanced to investigate the effect of the interfacial properties on the dynamic behavior of ceramic-metal composites in this paper. This method is the combination of RVE with random multi-particles based on voronoi diagram and cohesive zone models which is used to describe interfacial mechanical behavior. Two kinds of interface are considered in this work, one is perfact interface; the other is weak interface which is imperfect(including the strong and weak interface). The mechanical behaviors imperfect interface are described by classical Cohesive Zone Models. By this method, the effect of interface on the dynamic behavior of particle reinforced metal matrix composites had been investigated. The numerical results show that the interface properties have huge impact on dynamic mechanical behavior of composites, strong interfaces will delay the failure of marix; however, the composites will fail rapidly after the interfaces failed while the interfaces are weak.

Highlights

  • Because the particle reinforced metal matrix composites (PRMMCs) is made of ceramic phase and metal phase, it becomes a kind of materials with some unique characteristics, such as light weight, high specific strength, high specific modulus, low thermal-expansion coefficient and good wear resistance

  • A new voronoi representative volume element(VRVE) model with Cohesive Zone Models is advanced to investigate the effect of the interfacial properties on the dynamic behavior of ceramic-metal composites. a vornoi representative volume element (VRVE) model is created by the following steps

  • A new voronoi representative volume element(RVE) model with Cohesive Zone Models is advanced to investigate the effect of the interfacial properties on the dynamic behavior of ceramic-metal composites in this paper

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Summary

Introduction

Because the particle reinforced metal matrix composites (PRMMCs) is made of ceramic phase and metal phase, it becomes a kind of materials with some unique characteristics, such as light weight, high specific strength, high specific modulus, low thermal-expansion coefficient and good wear resistance. Until the computers have been applied widely, many numerical methods had been advanced to try to make clear it These methods are proved to be very effective and economic, especially, micro-mechanics methods are a class of typical representatives of these methods because the researchers can get the dynamic behavior of PRMMCs by the representive volume element (RVE) of PRMMCs. Most of the traditional RVE model adopt axisymmtric unit cell model to predict the dynamic properties of PRMMCs. Most of the traditional RVE model adopt axisymmtric unit cell model to predict the dynamic properties of PRMMCs These models cannot reflect the effect of both particle distribution and interface properties on the damage and dynamic properties of PRMMCs. The work of Zhang[1] proved if the proper damage mechanisms and the dynamic mechanical properties can be obtained by a multi-particles model with different particles distribution and different particle/matrix interfaces, the dynamic properties of composites can be predicted accurately. Multi-particles vornoi representative volume element (VRVE) with cohesive zone interface

The interface model-cohesive zone interface
Boundry Conditions
Results and Discussions
Conclusions
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