Tensile properties of carbon fiber reinforced polymer matrix composites: Application for the strengthening of reinforced concrete structure

Abstract

The paper presents the determination of material properties of carbon fiber-reinforced composite materials (carbon/epoxy) by numerical homogenization and experimental investigation. A periodic square array model of microstructure with and without pores is utilized for the homogenization. In the FEM software ANSYS, the numerical homogenization, as well as simulation of the experiment are performed. At first, to investigate the material characteristics of the carbon/epoxy composite laminate, a unidirectional quasi-static tensile test was conducted. The comparison of the results gathered from the numerical and experimental investigation followed. Secondly, we dealt with the application of FRP composite lamella for strengthening of the reinforced concrete structure. The high-strength glue epoxy used at the beam bottom in the milled slot, the composite lamella was fixed to the beam. In this application, firstly the reinforced concrete flexural four-point beam with steel bracing was evaluated and then the bonded lamella effect was considered. MSC MARC and Mechanical APDL ANSYS software were used for the analysis. The Von Mises stress and deflection of the concrete reinforced beam without and with lamella bracing was examined numerically, as well as experimentally. The results revealed that using of the lamella influenced the reduction of maximum tensile stress in concrete and concrete reinforcement.