Evaluation of analytical and numerical models for the elastic-plastic response of particulate composites

Document Type

Conference Proceeding

Date of Original Version

12-1-1992

Abstract

The deformation and failure mechanisms of particle and whisker reinforced metal-matrix composites include inclusion/matrix debonding, ductile failure of the matrix and inclusion cracking. These mechanisms are influenced by processing induced microstructural features such as the inclusion aspect ratio, inclusion orientation distribution, spatial distribution of inclusions (clustering) and residual stresses. To understand the effects of these localized microstructural features on the composite response requires detailed numerical modeling. Numerous modeling techniques have been proposed for the elastic and elastic-plastic response of composites with discontinuous particle and whisker reinforcements. These models are primarily analytical and typically assume idealized microstructural features. Modeling of non-ideal, localized effects requires the development of appropriate numerical procedures. It is therefore of interest to review and compare existing idealized models in order to identify appropriate numerical models to investigate localized effects. In this paper, the composite elastic and elastic-plastic responses predicted by several models are evaluated and discussed. These results may be used to define appropriate numerical models to determine the effects of processing induced microstructural features on the macroscopic composite response.

Publication Title, e.g., Journal

American Society of Mechanical Engineers, Materials Division (Publication) MD

Volume

35

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