EFFECTIVE PROPERTIES FOR FIBER COMPOSITES WITH RHOMBIC PATTERN AND IMPERFECT INTERFACE

摘要

Fiber reinforced composites get an increasing attention in the development of new materials. By controlling the manufacturing process, it is possible to get the desired material properties. With the recent advances in numerical modeling of composites, it is possible to predict the effective material properties of the composites. A number of numerical and analytical methods have been developed to estimate the effective coefficients using homogenization methods. By micromechanical models based on unit cell or representative volume element (RVE) the problem can be reduced on investigation of a periodic part of an infinite structure. But existing approaches are often restricted to certain types of arrangements. Mostly simple arrangements like square or hexagonal patterns have been investigated which result in an overall transverse isotropic behavior of the composite. An interesting goal is to create composites with orthotropic behavior in the transverse plane which can be achieved by rhombic fiber arrangements in connection with high volume fraction for the fibers [1].