抄録
Capability of an analytical homogenization procedure of the Aboudi generalized method of cells (MOC) to predict the off-axis time- and rate-dependent behavior of unidirectional polymer matrix composites has been elucidated. Viscous response of polymer matrix materials is described by using the Chaboche constitutive model, since it has a general structure to describe the nonlinear natures of matrix viscoplasticity. The MOC micromechanics model can favorably reproduce the rate-dependent stress-strain relationships and the time-dependent stress relaxation behavior of AS4/PEEK under off-axis conditions. Various calculations are performed for different number of the subcells of RVE and for different shape of the fiber. It is also demonstrated that the MOC micromechanics results in predictions almost comparable with those obtained by FE-based mathematical homogenization for the off-axis nonlinear behavior of unidirectional composites.
