A new test for determining fracture toughness in plane stress in mode II

Abstract

This article presents a new experimental test for determining fracture toughness, in plane stress, in crack opening mode II based on the utilization of double-notched circular test specimens loaded in plane torsion. The proposed methodology for determining fracture toughness involves characterization of the evolution of torque with the degree of rotation for a number of test cases performed with specimens having different lengths of the ligaments between the notches. The work is supported by measurement of the in-plane and gauge length strains in aluminium AA1050-H111, and the overall experimental results show that the new proposed test provides an easy and effective way of evaluating the ability of a sheet metal to resist cracking under in-plane shear loading conditions.

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“…It is a pleasure to announce the winners of the 2015 CEGB-SAGE Best Paper Award: Kerim et al 1 for their paper 'A new test for determining in-plane stress in mode II'. The winners receive a certificate and a small monetary prize.…”