Effect of crack position and loading conditions on SIF in SiC particles reinforced Al composite

Aicha Metehri,Abdelkader Lousdad,Madani Kouider

doi:10.3221/igf-esis.48.18

Aicha Metehri, Abdelkader Lousdad + Show 1 more

Open Access

https://doi.org/10.3221/igf-esis.48.18

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Abstract

In this paper the effect of reinforcement crack position and loading conditions (in mode I) on the stress intensity factors of the Al/SiCp metal matrix composite was examined using a finite element method. A simple cubic cell model with square reinforcement shapes was developed to investigate its effect on the mechanical properties of the MMC. The finite element technique was used to calculate the stress intensity factors KI and KII for crack in the matrix and in particle. The particle and matrix materials were modelled in linear elastic conditions. The obtained results show the important role on the stress intensity factors played by the relative elastic properties of the particle and matrix. The results also show that the loading conditions and inter-distance between two particles with two interfacial cracks has an important effect on the KI and KII stress intensity factors.

Highlights

Particle-reinforced metal–matrix composites (PRMMCs) are increasingly attracting the attention of automotive and consumer goods industries
The existence of a crack in the matrix at a vicinity of the interface particle/matrix with the distance c=5μm and the length a=50μm was studied as shown in Fig. 4 where the normal and shear mechanical stresses distributions at the crack tip are given for σ=200MPa
These results indicate that deformation fields in the vicinity of the crack tip are dominated by opening mode KI value

Summary

Introduction

Particle-reinforced metal–matrix composites (PRMMCs) are increasingly attracting the attention of automotive and consumer goods industries. It is reported that Aluminum reinforced with silicon carbide particles (SiCps) exhibited several advantages in structural applications because of unique properties. This included isotropic mechanical properties, high specific stiffness, high specific modulus, thermal stability and strength as well as high wear resistance. These composites have found new applications as structural materials in aerospace and automotive industries Zhou (2003) [1]. Other numerical analyses have been carried out by a number of researchers by considering matrix and reinforcement properties and their respective volume fractions These analyses approached the problem by considering the unit cell concept of regular array of particles in the matrix. The shape of the particles was assumed to be either: cylindrical, spherical, rectangular or cubical

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