 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12854 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
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| In English (Mech. Solids): | | 4810 |
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| L.A. Igusheva and Yu.V. Petrov, "Effect of Thermal Treatment on the Granite Dynamic Fracture Toughness and Its Structural-Temporal Characteristics," Mech. Solids. 59 (1), 379-386 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
1 |
Pages |
379-386 |
| DOI |
10.1134/S0025654423602781 |
| Title |
Effect of Thermal Treatment on the Granite Dynamic Fracture Toughness and Its Structural-Temporal Characteristics |
| Author(s) |
L.A. Igusheva (Saint Petersburg State University, St. Petersburg, 198504 Russia, igusheva15@gmail.com)
Yu.V. Petrov (Saint Petersburg State University, St. Petersburg, 198504 Russia; Institute for Problems in Mechanical Engineering of Russian Academy of Sciences, St. Petersburg, 199178 Russia, yuripetr@gmail.com) |
| Abstract |
Fracture toughness strain rate dependences of granite pre-treated at different temperatures
was investigated in this work. Structural-temporal approach based on the concept of incubation time
was used to predict critical dynamic material characteristics of the fracture processes. A formula for
the relationship between the stress intensity factor and the stress intensity rate for the case of a linearly
increasing pulse is presented. Theoretical calculations were compared with already known experimental data on the preheated granite dynamic fracture. The qualitative agreement between calculation and
experiment was shown. It was obtained that the dynamic fracture toughness increases with the loading
rate for all temperature values but decreases with the treatment temperature. The relationship between
incubation time and granite treatment temperature was proposed. It was found that the higher the pretreatment temperature, the greater the incubation time. The effect of fracture toughness inversion was
analyzed consisting in the fact that the fracture toughness value of granite preheated to 100°C is greater
under slow loads but less under high-speed loads compared to granite preheated to 250°C. The effectiveness of the structural-temporal approach for taking into account the influence of rate and temperature factors on the granite dynamic fracture was considered. It is revealed that two material characteristics (incubation time and static fracture toughness) are sufficient to determine the dynamic fracture
toughness. |
| Keywords |
dynamic fracture toughness, granite, thermal treatment, structural-temporal approach, fracture incubation time |
| Received |
29 December 2023 | Revised |
21 January 2024 | Accepted |
25 January 2024 |
| Link to Fulltext |
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