網目状の繊維で強化した複合材料表面の微小引っかき特性の数値評価

抄録

Natural fiber composites receive wide attention as a sustainable material. The composite is toughened by fibers. Nano-C/C composites using Bacteria Cellulose have been developed, and present good tribological properties. In this study, we consider a natural fiber reinforced composite with random orientation of fiber and make a multi-scale model of the composite in order to clarify the characteristic of scratching on composite materials. The fiber structure filled with polymer matrix forms a natural fiber reinforced composite. To investigate tribological properties of the composite, we simulate a scratch test of the composite. The model consists of macroscopically homogeneous medium, microscopically inhomogeneous medium and a sphere. As we evaluate effective properties of the composite as a macroscopic homogeneous medium, a homogenization theory is applied. We demonstrate micro scratching on composite materials to clarify relation between load variation in scratching test and micro structure of composites.