Abstract
Incremental constitutive relation of shape memory alloy composite, in which shape memory alloy short-fibers are dispersed in a matrix, has been developed based on the shear-lag model. In the model, the shape memory alloy is described by one-dimensional constitutive relation proposed by Brinson and the matrix is described by the conventional elastic plastic constitutive relation. Using the proposed constitutive relation, the deformation of NiTi short-fiber dispersed nylon 66 composite is analyzed under thermo-mechanical loading. The shape memory alloy composite exhibits the unique performance such as pseudoelasticity, shape memory effect, contraction by heating, formation of compressive residual stress in matrix, and so on. The constitutive relation is useful in the investigation to explore the potentiality of the shape memory alloy composites.
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