Determination of fracture resistance of samples with a chevron notch using three-point bending

E. E. Deryugin^a, A. A. Bogdanov<sup>b

a</sup> Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
^b Tomsk Polytechnic University

Abstract: We have proposed a procedure for the experimental determination of the specific fracture energy of a material under loading by a three-point bending of a rectangular sample with a chevron notch. At the initial stages of crack propagation in the chevron notch zone, a linear dependence of the sample compliance on the crack length is observed. This makes it possible to calculate the specific fracture energy of a material without using the phenomenological equations used under standard test conditions. The calculations were carried out for VT1-0 technical titanium.

Keywords: crack resistance, three-point bending, chevron notch, specific fracture energy, VT1-0 technical titanium.

Received: 26.06.2021
Revised: 09.07.2021
Accepted: 09.07.2021

DOI: 10.21883/PJTF.2021.20.51612.18936

 English version: Technical Physics Letters, 2022, 48:1, 5–7

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