FEM을 이용한 적층각도 변화에 따른 CFRP 판의 물성치 예측 및 신뢰성 평가

Abstract

Fuel efficiency and environmental problem is an important problem in transportation equipment. Latest, light weight material such as CFRP, Aluminum, Magnesium has been studies in order to apply in the field of automotive, train and aerospace industries. vehicle fuel economy is improved. when the weight of the transportation equipment is reduced. in addition, Vehicle weight reduce the carbon dioxide emissions. Lightweight materials used in electric vehicles. It increase the mileage and energy efficiency can be improved. CFRP has low thermal strain, strength, rigidity, insulating property. but CFRP is anisotropic materials. So it is difficult to obtain the mechanical characteristics of CFRP by Theoretical methods. Due to these problems, we usually obtain the mechanical properties of CFRP through material experiments. It is difficult to obtain the mechanical properties of CFRP. And much cost and times are needed. CFRP have to experiment for obtain exact properties of matter. If every time you change the test method has to experiment. In case of will spend a lot of money and time. Simulation method In order to solve this problem would be to apply. Many country is used to Simulation method. Korea trend apply to Simulation method gradually. GENOA is Composite materials analysis program dedicated. GENOA and other analysis programs are difference. GENOA is can be apply to the environment variables(Fiber, Matirx, Void volume ratio, Fiber Volume ratio and Stacking angle, etc). So it is with the actual experimental result stunning results. MCQ using a property of matter obtained from the actual experiment, was simulation. Thus, the properties of matter of each layer can be obtained. Previous studies have evaluated the basic physical properties of CFRP using NX-Nastran and GENOA. After had a reliability assessment. In this study, Different stacking to predict the strength and stiffness. using the fiber and Matrix properties obtained from previous study.(Simulation specimen is same experiment specimen.) Compare the simulation results with experimental results, the reliability was evaluated.