Abstract
The evaluation of the properties of discontinuously reinforced metal matrix composites (DRMMCs) has been the focus in research of composite fields, though the quantitative evaluation of the properties of composites is difficult. Until now in spite of some property evaluation models were proposed, because of their omission of the coordinated effects of the continuous matrix and discontinuous reinforcements, or over simplification of the stress/strain fields in practical DRMMCs, both diverging the real conditions in DRMMCs, the evaluation of strength properties of DRMMCs are empirical, except for elastic constants, and there is few reports about the quantitative evaluation of elastic limit of DRMMCs. In present work, the effective axial divided stress in arbitrary section and the strain constraint in matrix are introduced into analysis, to establish an expression of predictive elastic limits of DRMMCs, and to evaluate the engineering elastic limit of this type of composites.
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