Experimental determination of tensile strength and KIc of polymer concretes using semi-circular bend (SCB) specimens

M.R.M. Aliha, M. Heidari-Rarani, M.M. Shokrieh and M.R. Ayatollahi

Abstract

An experimental method was suggested for obtaining fracture toughness (KIc) and the tensile strength (at) of chopped strand glass fiber reinforced polymer concretes (PC). Semi-circular bend (SCB) specimens subjected to three-point bending were used for conducting the experiments on the PC material. While the edge cracked SCB specimen could be used to evaluate fracture toughness, the tensile strength was obtained from the un-cracked SCB specimen. The experiments showed the practical applicability of both cracked and un-cracked SCB specimens for using as suitable techniques for measuring KIc and at in polymer concretes. In comparison with the conventional rectangular bend beam specimen, the suggested SCB samples need significantly less material due to its smaller size. Furthermore, the average values of

Key Words

polymer concrete; SCB specimen; tensile strength; fracture toughness; experiment

Address

M.R.M. Aliha: Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran; Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST),Tehran 16846-13114, Iran M. Heidari-Rarani: Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran M.M. Shokrieh: Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran M.R. Ayatollahi: Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran 16846-13114, Iran

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