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Author Ghosh, S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ COMPOSITE MATERIALS ♦ MICROSTRUCTURE ♦ FRACTURE PROPERTIES ♦ FRACTURE MECHANICS ♦ MATHEMATICAL MODELS
Abstract This paper deals with the evolution of damage in microstructures of reinforced ductile-matrix composites, by particle cracking and splitting. A small deformation Voronoi Cell finite element model is developed, in which each element may consist of a matrix phase, an inclusion phase and a crack phase. Brittle inclusions may be of arbitrary shapes and sizes, and may be dispersed non-uniformly in the matrix. Damage initiation of inclusions is assumed to follow a maximum principal stress theory. Complete particle cracking or splitting is assumed at the onset of damage. The model is validated by a few comparison studies. Various geometric patterns are studied to test the effectiveness of the model, as well as to understand the effect of morphology on damage evolution. Actual microstructures from optical micrographs of Al-Si-Mg composite systems are analyzed and compared with experimentally observed results. Quantitative characterization and statistical analysis is conducted to correlate morphological parameters with mechanical response.
ISSN 13596454
Educational Use Research
Learning Resource Type Article
Publisher Date 1998-01-23
Publisher Place United States
Journal Acta Materialia
Volume Number 46
Issue Number 3


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