탄소/에폭시 적층 복합재료 손상구조해석 검증

For the development of composite material underwater vehicle propeller superior to the radiation noise, it is necessary to carry out the researches on the diverse fiber directions and arrays and also to develop numerical simulation techniques for its optimum structural analysis with the experiments. In the last study, characteristics and weight drop tests of composite laminar specimens were performed and their mechanical properties and damage states were examined according to their tests. In addition, using composite material model MAT_162 (Composite_DMG_MSC) linked with LS-DYNA code, progressive damage structural analysis technique was developed by the investigation of the damage mechanism and by the calibration of the parameters according to the damage criteria. In this study, previously developed progressive damage structural analysis technique was verified using characteristics and weight drop tests of carbon/epoxy composite laminar specimens with different array (0/45/90). Through this study, it might be thought that the optimum structural design of composite laminates and propeller could be derived with high accuracy for the maximization of its performance at the reversed design stage by the estimation of their strengths, energy absorption capacities and damage states according to the diverse fiber arrays.