Micromechanics-Based Failure Model of Granular/Particulate Medium withReinforcing Fibers

摘要

This research has focused on limit behavior of fiber composites with granularmatrices (such as fiber reinforced soils). Dominant mechanisms of fiber matrix interaction were identified. Mathematical description of the behavior of granular composites on the macroscale was presented based on microstructural interactions. The concept of mathematical homogenization was introduced to represent the failure properties of the composite on the macroscale. Failure criteria for composites both with fibers in a preferred direction and with randomly distributed fibers were derived. A Laboratory technique was devised for preparation of the specimens of fiber reinforced composites. Experimental test were carried out, and the experimental evidence was collected for validation of the mathematical description. Implementation of the derived criteria in numerical methods for solving boundary value problems was presented.