Rate-dependent lattice modeling of textile reinforced cementitious composites under tensile loading

Abstract

This paper presents a lattice-based modeling technique to simulate the direct tensile behavior of textile reinforced cementitious composites (TRCC) under quasi-static and dynamic loadings. To analyze the reinforcing effect of textiles in TRCC, the fiber bridging force and the shear stress transmission at the fiber-matrix interface are non-locally modeled. Along with an appropriate scheme for explicit time integration, visco-plastic rheological units are introduced to depict the dynamic behavior of the cementitious matrix. The model results are compared with those of both static and dynamic experimental studies. It is demonstrated that the model well describes the strain hardening and multiple cracking behavior of TRCC and effectively captures the dynamic behavior. Proper stress transfer formulation of the fiber-matrix interface is essential for simulating the crack patterns, including crack distributions and openings, observed in the experiments. Furthermore, the effect of the strain rate on these interfacial properties of TRCC is investigated in the dynamic analysis.