The preliminary heat treatment influence on the rock fracture toughness

Authors

UDC

539.375

DOI:

https://doi.org/10.31429/vestnik-21-1-26-33

Abstract

The change in the dynamic granite fracture toughness as a result of preliminary heat treatment studied. Based on known experimental data, the rate dependences of the fracture toughness of granite pre-treated at temperatures of 25 °C, 100 °C, 250 °C, 450 °C, 600 °C and 850 °C constructed. To describe the material fracture, the incubation time based approach used. With increase in the rate of stress intensity factor, an increase in fracture toughness observed for all temperature values. With increasing temperature, the dynamic fracture toughness decreases, and the incubation time increases. Granite processed at a temperature of 100° has higher fracture toughness under quasi-static loads, but more easily fracture under dynamic impacts compared to granite processed at a temperature of 250 °C.

Keywords:

dynamic fracture toughness, rock fracture, granite, incubation time, loading rate

Acknowledgement

This study was supported by the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075-15-2022-1114 dated June 30, 2022).

Author Info

Liudmila A. Igusheva

аспирант кафедры теории упругости математико-механического факультета Санкт-Петербургского государственного университета

e-mail: igusheva15@gmail.com

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Issue

2024. Vol. 21. No. 1

Section

Mechanics

Pages

26-33

Submitted

2024-02-12

Published

2024-03-27

How to Cite

Igusheva L.A. The preliminary heat treatment influence on the rock fracture toughness. Ecological Bulletin of Research Centers of the Black Sea Economic Cooperation, 2024, vol. 21, no. 1, pp. 26-33. DOI: https://doi.org/10.31429/vestnik-21-1-26-33 (In Russian)

Copyright (c) 2024 Igusheva L.A.

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