Non-linear FE2 multiscale simulation of damage, micro and macroscopic strains in polyamide 66-woven composite structures: Analysis and experimental validation

This paper presents an experimental approach aimed at analyzing and validating a two-scale nonlinear Finite Element (FE2) simulation of 3D composite structure. The studied material consists polyamide thermoplastic matrix, exhibiting viscoelastic-viscoplastic behavior with ductile damage, reinforced by woven glass fabric whereby inelastic anisotropic damage is considered. multiscale parallel computation founded on the periodic homogenization microscopic scale, which considers geometric description reinforcement’s architecture accounts for time-dependent non-linear local each constitutive phase. For numerical implementation macroscopic scales, advanced UMAT subroutine developed combined parallelization technique in commercial software Abaqus/Standard. multilevel achieved simultaneously both scales (microscopic macroscopic) through incremental scheme. Numerical results FE are analyzed compared obtained different stacking sequence configurations holed plate subjected to tension. Besides good agreement between predicted load–displacement global responses, strain fields reasonably agrees those measured experimentally Digital Image Correlation (DIC) technique. Furthermore, performance capabilities strategy demonstrated getting access, microstructure spatiotemporal distributions internal variables as well evolution polymer matrix reinforcement (yarns).