Multiscale analysis of notched fiber reinforced laminates

摘要: Abstract An efficient two-scale computational method to predict the progressive damage and failure response of three different polymer matrix multidirectioanl laminates used in Tech Scout-1 challenge, conducted by Air Force Research Laboratory (AFRL) for uniaxial tensile compressive responses is presented. The sub-scale model an analytical model, 2CYL (2-concentric cylinder) developed Zhang Waas [1] earlier. material system IM-7/977–3. notched are modeled explicitly using 3D solid elements individual lamina interlaminar finite thickness layer discrete cohesive zone (DCZM) [2]. constituent level input parameters obtained from standard unnotched [0], [90] [ + 45 / − ] 4 s coupon experimental data, provided AFRL. microdamage pre-peak nonlinearity a secant stiffness approach, while post-peak softening mesh-objective smeared crack approach (SCA) [3, 4], implemented at macroscale. proposed strategy each fiber dominated intralaminar modes interfaced with SCA macroscopic detailed local ply mechanisms. predicted results compared [5] that show very good agreement.