Computer Simulation of Failure Process of a Fiber-reinforced Concrete Composite with Randomly Distributed Fiber Clusters

Fiber-reinforced concrete (FRC) composites to date are not fully researched with regard to the mechanical behavior of the random distribution of the fibers inside the matrix, which tend to bundle (fiber clusters). In this work we study the influence of the random distribution of fibers in the matrix by means of computer modeling applied to structural plane specimen subjected to tension loading. Increasing the tension load the failure will appear first in the weak concrete zones induced by the random distribution of inclusion elements. These failure elements are now modified as air elements, and the process goes on until collapse. As a result of this process the stress—strain plots of the sample until failure, and the stress—strain graph at the time of gradual application of the tension stress are found. We compare the obtained results with Kerner`s model. Computer modeling is achieved by the ANSYS program coupling a subroutine written in APDL language.