In this work, we use a recently-formulated Graph-based Finite-Element Analysis (GraFEA) framework developed for modeling deformation and non-local fracture in quasi-brittle materials to simulate the response of high-strength concrete (HSC) samples under impact loads. By fitting material parameters theory match macroscopic force–displacement obtained from three-point bending experiment conducted...

The fracture behaviors of quasi-brittle materials are commonly specimen size (size effect) and crack size (boundary effect) dependent. In this study, a new failure model is developed for characterizing the size and boundary effects. The derivative of the energy release rate is firstly introduced to predict the nominal strength dominated by the strength mechanism. Combined with the energy criter...

Computational analysis of quasi-brittle fracture in cement-based and similar composites, supplied by various types rod, fibre, etc. reinforcement, is crucial for the prediction their load bearing ability durability, but rather difficult because risk initiation zones microscopic defects, followed formation propagation a large number macroscopic cracks. A reasonable complete deterministic descrip...

This paper presents a framework for modeling failure in quasi-brittle geomaterials under different loading conditions. A micromechanics-based model is proposed which the field variables are linked to physical mechanisms at microcrack level: damage related growth of microcracks, while plasticity frictional sliding closed microcracks. Consequently, hardening/softening functions and parameters ent...