The influence of the free surface on the fracture of alumina particles in an Al-Al2O3 metal-matrix composite

The influence of the free surface on the load carried by elastic inclusions embedded in an elastic--plastic matrix was investigated by the finite element method. A 2D multi-particle model was developed based on the statistical evaluation of the microstructure of a commercial metal--matrix composite....

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Bibliographic Details
Published in:Computational materials science 2003, Vol.26, p.183-188
Main Authors: BORBELY, A, BIERMANN, H, HARTMANN, O, BUFFERRE, J. Y
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Fractures
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
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Summary:The influence of the free surface on the load carried by elastic inclusions embedded in an elastic--plastic matrix was investigated by the finite element method. A 2D multi-particle model was developed based on the statistical evaluation of the microstructure of a commercial metal--matrix composite. The results of simulated tensile tests show that the average particle stresses are sensitive to the adopted boundary conditions. Inclusions near a free boundary carry in general smaller loads than the inclusions in the bulk. Damage predictions of the model are in good agreement with the experimental data obtained by X-ray microtomography.
ISSN:0927-0256
1879-0801
DOI:10.1016/S0927-0256(02)00397-X