Effect of particulate shape on cyclic deformation of inclusion-reinforced composites:Meso-mechanical constitutive modeling and simulations

摘要

Based on the Eshelby equivalent inclusion theory and the extendedMori-Tanaka (MT) method,A meso-mechanical constitutive model was proposed to simulate the cyclic deformation of inclusionreinforcedcomposites (such as SiCP/6061Al composites) by Guo and Kang [Int. J. Plast. 27 (2011)1896]. In this work, we present a improved version of the formulations in the meso-mechanical constitutivemodel, by which the effect of particulate shape can be considered. Base on the newlyimproved model, the monotonic tensile stress-strain curve and cyclic deformation behaviour ofSiCP/6061Al composites were simulated by considering different particulate shapes, and the effectof particle shape on the deformation of the composite was discussed. Moreover, in order to verifythe reasonability of the improved model, the corresponding simulated results obtained by the finiteelement method were given synchronously. It is shown that the effects of particulate shape on thecyclic deformation behaviour of the inclusion-reinforced composites can be reasonably consideredand described with the meso-mechanical constitutive model improved in this paper and the applicabilityand universality of the proposed meso-mechanical constitutive model were substantiallypromoted.