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Dynamic Fracture Behavior of Granite with Double Elliptical Defects under Impact Load
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Sheng-nan XU1, Lin-zhi PENG2, *, Xu WANG1, Xing-yuan ZHOU1, Huang WANG1, Hao-chen QIN1, An-jia PENG1
Science Technology and Engineering | 2025, 25(6) : 2218 - 2226
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Science Technology and Engineering | 2025, 25(6): 2218-2226
• Papers·Mechanics •
Dynamic Fracture Behavior of Granite with Double Elliptical Defects under Impact Load
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Sheng-nan XU1, Lin-zhi PENG2, *, Xu WANG1, Xing-yuan ZHOU1, Huang WANG1, Hao-chen QIN1, An-jia PENG1
Affiliations
  • 1 School of Mechanics & Civil Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
  • 2 School of Civil Engineering, Chengdu University of Technology, Chengdu 610000, China
Published: 2025-02-28 doi: 10.12404/j.issn.1671-1815.2308710
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In order to study the failure mode and energy dissipation law of granite with double elliptical defects, dynamic splitting tensile experiments were conducted on granite with double elliptical defect angles of 0°, 45°, 90°, and 135° using a SHPB(split Hopkinson bar) device. The relationship between the angle and spacing of double elliptical defects, as well as the failure morphology and energy of granite, was explored. The results show that when the distance between double elliptical defects remains constant, the larger the included angle, the easier the specimen is to fracture. When the angle remains constant, the spacing increases and the rock sample is more prone to fracture. The dissipated energy density of the specimen decreases with the increase of the included angle, and the downward trend gradually tends to be gentle. The failure mode of the specimen is highly sensitive to the angle, that is, as the angle increases, the degree of fragmentation of the rock sample gradually intensifies, the symmetry of the fragments disappears, the wedge effect gradually becomes obvious, and the plasticity increases. When the included angle exceeds 90°, the degree of fragmentation begins to decrease again, and the rock sample exhibits symmetrical fracture.

impact load  /  SHPB(split Hopkinson bar)  /  DIC(digital image correlation method)  /  dynamic fracture  /  dissipative energy
Sheng-nan XU, Lin-zhi PENG, Xu WANG, Xing-yuan ZHOU, Huang WANG, Hao-chen QIN, An-jia PENG. Dynamic Fracture Behavior of Granite with Double Elliptical Defects under Impact Load[J]. Science Technology and Engineering, 2025 , 25 (6) : 2218 -2226 . DOI: 10.12404/j.issn.1671-1815.2308710
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Year 2025 volume 25 Issue 6
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Article Info
doi: 10.12404/j.issn.1671-1815.2308710
  • Receive Date：2023-11-07
  • Online Date：2025-07-27
  • Published：2025-02-28
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  • Received：2023-11-07
  • Revised：2024-11-25
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Affiliations
    1 School of Mechanics & Civil Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
    2 School of Civil Engineering, Chengdu University of Technology, Chengdu 610000, China
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Citations
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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