早稲田大学 · 材料科学
Yoshihiko Arao教授の研究室では、炭素繊維強化プラスチック（CFRP）やグラフェンをはじめとする先端複合材料の成形・特性評価・応用に向けた基礎的研究を進めています。特に、湿度・温度環境下におけるCFRPの寸法安定性や応力緩下挙動、グラフェンの高収率・高品質な液体中剥離プロセスの確立が主な研究テーマです。また、複合材料の構造的挙動を高精度に予測するための理論的・実験的アプローチも展開しています。
Figures are computed from collected data and may differ slightly.
Thermal deformation analysis was performed on a carbon fiber reinforced plastic (CFRP) mirror with sandwich structure. To obtain unexpected asymmetry of the surface sheet, we investigated the deformation of a quasi-isotropic laminate under hot and humid conditions. Despite the symmetric lay-up, quasi-isotropic laminate deforms into twisted saddle shape with time, and this deformation could be simulated by assuming ply angle misalignment. Then, the elastic moduli of honeycomb cores were calculate
Developing a mass production method for graphene is essential for practical usage of this remarkable material. Direct exfoliation of graphite in a liquid is a promising approach for production of high quality graphene. However, this technique has three huge obstacles to be solved; limitation of solvent, low yield and low quality (<i>i.e.</i>, multilayer graphene with a small size). Here, we found that soluble graphite produced by mechanochemical reaction with salts overcomes the above three draw
The moisture absorption behavior of carbon fiber-reinforced plastic (CFRP) and its effect on dimensional stability were examined. Moisture diffusivity in CFRP was determined by measuring a specimen's weight during the moisture absorption test. Three types of CFRP specimens were prepared: a unidirectionally reinforced laminate, a quasi-isotropic laminate and woven fabric. Each CFRP was processed into two geometries — a thin plate for determination of diffusivity and a rod with a square cross-sect
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