ハイブリッド複合材料の材料設計

抄録

Composite materials containing two or more different types of fibers are called “hybrid” composite materials. The importance of hybrid composites is related to (1) the wider range of spectrum on materials properties, (2) the good balance between strength, rigidity and toughness of composites, and (3) the possibility of obtaining a more complicated multi-load-path structure. In this paper, a materials design guideline of hybrid composites is described from three viewpoints of interdisciplinary, integration and interface and some typical examples are given including the effect of interfacial strength on fracture toughness of composites. The characterization of the so-called “hybrid” effect are reviewed in terms of first failure strain enhancement, modified rule of mixture and condition of multiple fracture. A new simulation model is introduced in order to discriminate the difference between failure process due to hybrid constitutions, in which the interfacial debonding between fibers and matrix is taken into consideration as well as the fiber fracture.