Stiffness of particulate reinforced metal matrix composites with damaged reinforcements

B. Y. Zong, X. H. Guo, B. Derby

    Research output: Contribution to journalArticlepeer-review


    During tensile plastic deformation particulate reinforced metal matrix composites (MMCs) undergo reinforcement damage and a parallel reduction in stiffness. An analytical model is developed to calculate this stiffness reduction using the equivalent inclusion technique proposed by Eshelby. The model considers both damaged and undamaged reinforcement particles as ellipsoidal inclusions but with different stiffness tensors. The effect of the aspect ratio of the reinforcing particles has been accounted for in the model. The model is very flexible and can meet different specific damage situations by designing a suitable stiffness tensor for the damaged reinforcements. Finite element analysis is used to modify a numerical stiffness tensor for cracked reinforcement particles. The model is compared with an earlier model of modulus reduction in MMC materials and with a few experimental measurements made on a 15 vol.-%SiC participate reinforced aluminium alloy 2618 MMC. © 1999 IoM Communications Ltd.
    Original languageEnglish
    Pages (from-to)827-832
    Number of pages5
    JournalMaterials Science and Technology
    Issue number7
    Publication statusPublished - Jul 1999


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