高剛性・高減衰性を実現するCFRP-減衰材料複合構造体に関する研究

抄録

For structures of machine tools, weight savings, high stiffness and high damping are important properties. These requirements are not satisfied with only a single material, so composite materials are promising for machine structure. Carbon-fibre-reinforced plastics(CFRP) has high specific stiffness and damping compared to that of steel, but more damping capabilities are required for structural materials of machine tools. This paper proposes a three-dimensional topology optimization method to develop high stiffness and damping composite structures using CFRP and viscoelastic damping materials. To implement optimization algorithm, Abaqus and MATLAB were used. To illustrate the effectiveness of the proposed method, we designed a cantilever beam. The results showed the optimized cantilever beam had higher stiffness and higher damping than the cantilever beam with a single damping layer.