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Thermo-mechanical coupling in cracked granite: Influence of crack inclination on fracture behavior and temperature evolution
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Chenrui Huanga, b, c, Chaomin Mub, c, *, Fei Wangc, Yangyong Wud
Rock Mechanics Bulletin | 2026, 5(2) : 100272
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Rock Mechanics Bulletin | 2026, 5(2): 100272
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Thermo-mechanical coupling in cracked granite: Influence of crack inclination on fracture behavior and temperature evolution
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Chenrui Huanga, b, c, Chaomin Mub, c, *, Fei Wangc, Yangyong Wud
Affiliations
  • aSchool of Mining Engineering, Anhui University of Science and Technology, Huainan, 232001, China
  • bSchool of Safety Science and Engineering, Anhui University of Science and Technology, Huainan, 232001, China
  • cState Key Laboratory of Digital and Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan, 232001, China
  • dSchool of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan, 232001, China
Published: 2026-04-10 doi: 10.1016/j.rockmb.2025.100272
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Crack inclination angle (α) plays a critical role in the dynamic failure and thermo-mechanical coupling of granite, which is vital for rockburst monitoring and prevention. In this study, granite specimens with various prefabricated crack inclinations (α = 0°, 30°, 60°, 90°) were tested using a split Hopkinson pressure bar (SHPB) system. Transient crack tip temperatures were monitored in real time by high-speed infrared thermography, and crack propagation was analyzed using digital image correlation (DIC). The results show that: 1) Propagation mode and mechanical properties: Increasing crack inclination causes a transition from pure tensile propagation to tension-shear mixed modes. At α = 60°, enhanced shear promotes branching cracks, while at α = 90°, crack closure suppresses propagation and induces localized damage. 2) Strength characteristics: Peak stress exhibits a "U-shaped" trend with respect to α, reaching the lowest value at α = 60°. 3) Thermal response: Crack tip temperature rise is strongly dependent on inclination. The maximum rise (up to 9.266 ℃) occurs at α = 30° and 60° due to pronounced tension-shear coupling and frictional slip, whereas α = 0° and 90° show smaller increases. 4) Two-stage temperature evolution: Before peak stress, ~80% of the temperature rise originates from plastic work; after peak stress, crack slip and friction dominate, leading to accelerated heating. 5) Crack tip temperature rise serves as a sensitive indicator of local energy concentration and disaster risk, providing theoretical support for monitoring and prevention strategies in deep mining.

Prefabricated crack  /  Infrared temperature measurement  /  Crack tip temperature  /  Thermo-mechanical coupling
Chenrui Huang, Chaomin Mu, Fei Wang, Yangyong Wu. Thermo-mechanical coupling in cracked granite: Influence of crack inclination on fracture behavior and temperature evolution[J]. Rock Mechanics Bulletin, 2026 , 5 (2) : 100272 - . DOI: 10.1016/j.rockmb.2025.100272
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  • National Key Research and Development Program of China(2021YFC3100802)
  • Anhui Engineering Research Center of New Explosive Materials and Blasting Technology(AHBP2023B-09)
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Year 2026 volume 5 Issue 2
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Article Info
doi: 10.1016/j.rockmb.2025.100272
  • Receive Date：2025-06-07
  • Online Date：2026-06-17
  • Published：2026-04-10
Article Data
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History
  • Received：2025-06-07
  • Revised：2025-09-11
  • Accepted：2025-11-01
Funding
National Key Research and Development Program of China(2021YFC3100802)
Anhui Engineering Research Center of New Explosive Materials and Blasting Technology(AHBP2023B-09)
Affiliations
    aSchool of Mining Engineering, Anhui University of Science and Technology, Huainan, 232001, China
    bSchool of Safety Science and Engineering, Anhui University of Science and Technology, Huainan, 232001, China
    cState Key Laboratory of Digital and Intelligent Technology for Unmanned Coal Mining, Anhui University of Science and Technology, Huainan, 232001, China
    dSchool of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan, 232001, China

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* Corresponding author. E-mail address: (C. Mu).
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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