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Study on Energy Evolution and Fracture Characteristics of Sandwich Composite Rock under Impact Load
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Xiao-qing LIU1, 2, 3, Jia-hui SONG4, Yao-yao ZHANG4, Wei-wen KONG4, Hong-jia MEI4, Yan-bing WANG4
Blasting | 2024, 41(3) : 33 - 42
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Blasting | 2024, 41(3): 33-42
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Study on Energy Evolution and Fracture Characteristics of Sandwich Composite Rock under Impact Load
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Xiao-qing LIU1, 2, 3, Jia-hui SONG4, Yao-yao ZHANG4, Wei-wen KONG4, Hong-jia MEI4, Yan-bing WANG4
Affiliations
  • 1.Guoneng Shendong Coal Technology Research Institute, Yulin 719000, China
  • 2.State Key Laboratory of Water Resources Protection and Utilization in Coal Mining, Beijing 102211, China
  • 3.National Institute of Clean and Low Carbon Energy, Beijing 102211, China
  • 4.School of Mechanics and Civil Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
Published: 2024-09-01 doi: 10.3963/j.issn.1001-487X.2024.03.005
Outline
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In order to study the energy evolution and fracture characteristics of sandwich composite rocks under impact loads, six sets of sandwich composite rock specimens were created using three materials: sandstone, marble, and granite. Dynamic fracture impact tests were then conducted using the Hopkinson pressure bar system to analyze crack propagation morphology, stress wave waveform characteristics, crack tip stress field, and energy loss relationship. The DLSM simulation results were also used to analyze the propagation law of stress waves and the evolution process of kinetic energy during dynamic fracture processes. The results showed a good fit between the dynamic fracture process captured by high-speed cameras and the crack propagation process simulated by DLSM. It was observed that the occurrence of cracks depends on the failure of weak bedding planes. Under the same impact conditions, the lower the strength of the weak bedding planes, the shorter and more advanced the crack propagation time, and the more energy is used for crack propagation. Additionally, under the same incident energy conditions, using a specimen with higher hardness as the impact end material results in a stronger reflection effect, greater reflection energy, weaker transmission effect, smaller transmission energy, and greater energy dissipation of the specimen. The bedding plane was found to have a significant hindering effect on the propagation of stress waves.

rock mechanics  /  SHPB  /  NSCB  /  sandwich specimen  /  dynamic fracture  /  energy evolution
Xiao-qing LIU, Jia-hui SONG, Yao-yao ZHANG, Wei-wen KONG, Hong-jia MEI, Yan-bing WANG. Study on Energy Evolution and Fracture Characteristics of Sandwich Composite Rock under Impact Load[J]. Blasting, 2024 , 41 (3) : 33 -42 . DOI: 10.3963/j.issn.1001-487X.2024.03.005
Funding
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  • Supported by the Open Fund Project of the National Key Laboratory for Water Resource Protection and Utilization in Coal Mining(GJNY-21-41-06)
  • Special Project for Key R&D Tasks in Xinjiang Autonomous Region(2022B03028-3)
  • Supported by the Yueqi Young Scholars Program of China University of Mining and Technology (Beijing)(800015Z11A24)
Appendix
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Year 2024 volume 41 Issue 3
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82
36
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Article Info
doi: 10.3963/j.issn.1001-487X.2024.03.005
  • Receive Date：2023-09-17
  • Online Date：2026-03-20
  • Published：2024-09-01
Article Data
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History
  • Received：2023-09-17
Funding
Supported by the Open Fund Project of the National Key Laboratory for Water Resource Protection and Utilization in Coal Mining(GJNY-21-41-06)
Special Project for Key R&D Tasks in Xinjiang Autonomous Region(2022B03028-3)
Supported by the Yueqi Young Scholars Program of China University of Mining and Technology (Beijing)(800015Z11A24)
Affiliations
    1.Guoneng Shendong Coal Technology Research Institute, Yulin 719000, China
    2.State Key Laboratory of Water Resources Protection and Utilization in Coal Mining, Beijing 102211, China
    3.National Institute of Clean and Low Carbon Energy, Beijing 102211, China
    4.School of Mechanics and Civil Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
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https://castjournals.cast.org.cn/joweb/bp/EN/10.3963/j.issn.1001-487X.2024.03.005
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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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