Nested nonlinear viscoelastic and micromechanical models for the analysis of pultruded composite materials and structures

摘要: Abstract The present study introduces analytical and numerical formulations in order to derive the effective nonlinear viscoelastic response of pultruded composite materials structures. studied system consists two alternating layers reinforced with E-glass roving continuous filament mat (CFM). Two 3D micromechanical models are used for CFM, each having a unit-cell four fiber matrix subcells. A sublaminate model is also generate equivalent continuum layered medium. new recursive-iterative procedure introduced integrate Schapery isotropic subcells micromodels. An iterative algorithm predictor–corrector type steps formulated interface finite-element (FE). Off-axis creep compression tension tests, without circular hole, performed E-glass/vinylester polyester plates calibrate predict response. multiscale modeling approach shows good linear prediction compared experimental results.