HYBRID EFFECT OF MULTI-AXIAL WARP KNITTED FABRIC COMPOSITES ON MECHANICAL PERFORMANCES

摘要

In order to improve mechanical properties of conventional composite, hybridization is one of the effective methods. Generally, hybrid composite means fiber hybrid composite: for example, a composite has glass fiber and carbon fiber. The merits of fiber hybrid are to obtain high strength in specified direction and to be able to reduce producing cost and so on. On the other hand, the difference in coefficient of thermal expansion between glass fiber and carbon fiber introduces unique mechanical response. The concept of hybrid composite can be extended into matrix and the interface. Based on this concept, the authors have developed three types of hybrid composites: fiber hybrid, matrix hybrid and interfacial hybrid. Matrix hybrid means to combine two or more kinds of resin, for example, combination of conventional resin and flexible resin. The importance of matrix hybrid composite is that an indistinctive interface between both resin layers has to be formed because two or more kinds of resin have same chemical reaction. Interfacial hybrid is combination of two or more kinds of fiber surface treatment in a composite. Interfacial hybrid can achieve both excellent interfacial adhesion and small number of damage in the fiber bundle which is caused during textile fabrication. In this study, mechanical properties of the matrix hybrid composite were investigated.