Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

This paper presents a computational framework for modelling the fracture process in concrete under static and dynamic tensile loading considering its mesostructural characteristics. 3D mesostructure of composed real-shape coarse aggregates, mortar, interfacial transition zone between them voids was developed using an in-house code based on Voronoi tessellation splining techniques. Cohesive model then employed to simulate behaviour terms stress- energy dissipation-displacement responses crack mechanisms against shape (spherical irregular) volume fraction (30%, 35% 40%) aggregate strain rate (0, 1, 10 50 s?1). Results indicate that irregular has important role micro-crack nucleation ultimate pattern but exhibits insignificant effect strength concrete, which is mainly dependent random location size distribution aggregate.