Extended mean-field homogenization of viscoelastic-viscoplastic polymer composites undergoing hybrid progressive degradation induced by interface debonding and matrix ductile damage

In this contribution, a probabilistic micromechanics damage framework is presented to predict the macroscopic stress–strain response and progressive in unidirectional glass-reinforced thermoplastic polymer composites. Motivated by different failure modes observed experimentally, mechanism vicinity of fibers (namely, interphase) characterized initiating growing voids. The mechanisms can be formulated through Weibull density function. contrast, ductile degradation matrix initial stiffness analyzed via continuum theory. To accommodate interphase, three-phase Mori-Tanaka (MT) method transformation field analysis approach (TFA) are established within unified that allows simulation both discrete damages phases. Moreover, rate-dependent viscoelastic viscoplastic phase modelled phenomenological model consisting four Kelvin-Voigt branches branch under thermodynamics framework. reliability efficiency modified mean-field model, based on TFA scheme, assessed comparing simulated stress-strain against full-field Abaqus simulations multiaxial nonproportional loading paths at rates. developed provides an efficient alternative finite-element homogenization schemes or other techniques may compared, as well for potential extension theory simulating evolution composites with random reinforcement orientations.