A unit cell based three-phase approach for the mechanical characterization of quasi-brittle cementitious composites

摘要: A simple two-dimensional Unit cell (UC) with three different mesoscopic phases may be geometrically modeled as a combination of two concentric circles or squares embedded in square. In this paper, three-phase UC similar design is developed and utilized for modeling the full deformation failure response cement based quasi-brittle cementitious composites under compression. It was identified from numerical investigation that greatly improved prediction capability suitably capturing material nonlinearity observed experimentally. HighlightsSuccessfully implemented unit approach mechanical characterization composites.Captured non-linear behavior good correlation experiments.Established effectiveness non-linearity materials considered without sacrificing simplicity model.Different parametric studies were also conducted to identify influence certain phase characteristics considered.