CZM(Cohesive Zone Model)을 이용한 차체용 carbon/epoxy섬유직물 복합재의 mode Ⅱ 층간분리 거동 해석 연구

초록

Numerical analysis for mode II delamination of woven fabric carbon/epoxy composites for carbody structure was conducted. Woven fabric carbon/epoxy composites that made with prepreg of carbon fibers and epoxy resin(RS1222) are used carbody structure. FE analysis was conducted based on mode II interlaminar fracture toughness test of ASTM STP 1242. Model of ENF(End Notched Flexure) specimen having 120mm x 20m x4.2mm shape and 35mm initial crack was made with shell and cohesive elements. Each lateral lines that departed 10mm form the both edge on bottom face were fixed and displacement of 5mm was given on center line like three points bending jig having 100mm span. Reaction force of center line was compared with experimental results to verify this model.