Computational Characterization and Optimization of Hybrid Composites

The objective of this work was to develop a finite element based model to computationally characterize and optimize hybrid composites reinforced with two types of long-fibers of different materials. To that extent, two Matlab computer programs were developed and one other modified to meet the requirements of the problem. All three are thoroughly described. The investigation was based on the concepts described by homogenization theory. As such, the parametrization of the structure was reduced to that of a representative element volume. Two cross-sectional microstructures were analyzed: one with random and other with geometric fiber distributions. The results show optimum microstructural configurations for a number of loading cases, considering three possible filling fiber pairs: carbon fiber/E glass fiber, carbon fiber/epoxy fiber and carbon fiber/void; where the matrix material is epoxy. Additionally, stress distributions within the microstructure of a selected group of case studies are displayed.