물성 예측 시뮬레이션을 통한 CFRP 적층판의 FEM 해석에 관한 연구

Abstract

CFRP are widely employed in various applications, due to their high specific stiffness and specific strength compared to other solid metal. Lately, for that reason, the advanced composite are employed in aircraft and wind power blade and automobile, etc : materials should be as light as possible with the highest attainable performance. Previous studies have evaluated the basic physical properties of CFRP using GENOA. In this study, different stacking angle CFRP to predict the strength and stiffness. Material properties obtained from previous study through real test. Compare the simulation results with experimental results, the reliability was evaluated. Tensile test specimens were made for ASTM D3039 / D3039-00. [+0°/-0°]10 specimen size is 15×250×1.2mm(Width×Length×Thickness) And [+15°/-15°]10, [+45°/-45°]10, [+90°/-90°]10, [0°/90°]10, [90°/0°]10 size were 25×250×2.5mm. Tensile test was performed at displacement control on 2mm/min until fracture. Bending test specimens were made for ASTM D790. Test specimen size is 40×180×2mm. Stacking angle is same as tensile specimen. 3 point Bending testing machine was made for ASTM D790 and KS standard. The Supports's diameter was made in 30mm. Because of slip, The supports was fixed for degree of freedom. Support span is 120mm. And the loading nose was placed in center on specimen. The supports and the loading nose were installed between actuator and loadcell on UTM. And then Bending test was performed by the loading nose on 5mm/min. Predicted material properties was performed by Ansys in universal simulation. It was compared with real tensile test results and bending test results. Except the non-linear data, for all experimental conditions showed that the strength and stiffness value was saw in approximation. In the study, followed by GENOA with CFRP laminated Lamina properties prediction and interpretation method for the angle specific reliable. Accordingly, material properties prediction though GENOA for the previous study and analysis method was reliable.