Experimental and numerical study of damage mechanisms in cementitious materials reinforced with twisted steel fibers

Resumo

This study proposes to investigate damage mechanisms in the fiber/matrix interface, considering the use of twisted steel fibers incorporated into conventional and high-strength cementitious matrices. The methods employed include fiber pull-out tests and X-ray tomography for the detection and analysis of microcracks in the interface region. Additionally, elastoplastic finite element models will be developed, integrated with contact formulations, using the commercial software ABAQUS. Validation of the numerical models will be performed by comparing the characteristics of damage propagation obtained through microCT images with the simulated results.