Validation of pure shear test device using finite element method and experimental methods

In this paper, we will validate the Iosipescu shear test (IST) and the Hawong Iosipescu shear test (HIST) used for the pure shear test device; the HIST is modified from the IST. This validation uses finite element method and experimental method. In the IST the loads are applied on the outside edges of the specimen, while in the HIST the loads are applied on the neutral surface of the specimen. It has been certified that HIST is more effective than IST because of the simplicity of the loading device, loading method and the distribution of pure shear stress, etc. We know that the specimen with a 110° V-notched angle is more effective than the specimen with a 90° notched angle for a pure shear test device. In specimens with a 90° notched angle, the maximum shear stress occurs at the end of V-notch. While in specimens with a 110° notched angle, it is produced at the center of specimen. In both HIST and IST the most ideal ratio of a/b is 0.3 although the ratios of 0.3, 0.4, 0.5 of a/b are also useful, except for 0.2. When HIST or IST is under mode fracture, HIST or IST with β=90° is more effective than those with β=0°, as a pure shear test device.