INTERPRETATION FOR ASYMMETRIES IN ELASTIC MODULUS AND YIELD STRENGTH OF SHORT FIBER REINFORCED METAL MATRIX COMPOSITES

By using the deformation model proposed in paper 1 and the calculated results of the stresses, the expressions of tensile and compressive elastic moduli and yield strengths in the absence of thermal residual stresses were derived, which exhibit good agreement with the experimental results. It was shown that the asymmetry in the elastic modulus results from the compressive residual stress in the fiber root and the asymmetry in the yield strength results from the tensile residual stress in the matrix and compressive residual stress in the fiber.