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Experimental Study on Fracture Toughness and Crack Propagation Characteristics of Slate under Dynamic Loading
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Jian-guo ZHANG1, Wen YANG1, Hai-bo WANG2, Xiao-liang BAI1, Yi-wei ZHANG1, Yong-qiang FAN1, Yong-yang XING2, Yong-bin YANG1, Bo YANG1, Gao-wen YAN1, Wen-fei XUE1, Cong DUAN1, Zhen-jiang LIU1
Blasting | 2025, 42(1) : 37 - 43
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Blasting | 2025, 42(1): 37-43
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Experimental Study on Fracture Toughness and Crack Propagation Characteristics of Slate under Dynamic Loading
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Jian-guo ZHANG1, Wen YANG1, Hai-bo WANG2, Xiao-liang BAI1, Yi-wei ZHANG1, Yong-qiang FAN1, Yong-yang XING2, Yong-bin YANG1, Bo YANG1, Gao-wen YAN1, Wen-fei XUE1, Cong DUAN1, Zhen-jiang LIU1
Affiliations
  • 1.China Communications Second Highway Engineering Bureau Limited Company, Xi'an 710000, China
  • 2.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Published: 2025-05-20 doi: 10.3963/j.issn.1001-487X.2025.01.005
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To investigate the fracture toughness of natural slate under dynamic loading, dynamic impact tests were conducted on notched semi-circular bending slate specimens by a 50 mm diameter split Hopkinson pressure bar testing system and the crack growth process was recorded by the high-speed cameras. Furthermore, the dynamic fracture toughness and crack propagation rate of slate under different impact pressure and prefabricated crack lengths were studied. The results show that the dynamic fracture toughness of the specimen is positively correlated with the impact pressure and loading rate, and the dynamic fracture toughness first increases and then decreases with the rise of the prefabricated crack length. According to the fitting results, the dynamic fracture toughness of the specimen reaches the maximum value when the prefab crack length is 7.45 mm. The maximum values of dynamic fracture toughness at 0.2, 0.3 and 0.4 MPa were 2.99, 3.57 and 4.14 GPa·m1/2, respectively. The failure process of the specimen can be divided into five stages: dynamic damage, crack propagation, crack formation, crack propagation, and specimen fracture. The propagation speed of the main crack of the specimen greatly fluctuates, while the prefabricated crack length has little effect on the propagation velocity of the specimen. The study revealed the differences in dynamic fracture behavior of slate specimens under different working conditions.

slate  /  NSCB  /  SHPB  /  prefabricated crack  /  dynamic fracture toughness
Jian-guo ZHANG, Wen YANG, Hai-bo WANG, Xiao-liang BAI, Yi-wei ZHANG, Yong-qiang FAN, Yong-yang XING, Yong-bin YANG, Bo YANG, Gao-wen YAN, Wen-fei XUE, Cong DUAN, Zhen-jiang LIU. Experimental Study on Fracture Toughness and Crack Propagation Characteristics of Slate under Dynamic Loading[J]. Blasting, 2025 , 42 (1) : 37 -43 . DOI: 10.3963/j.issn.1001-487X.2025.01.005
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  • Open Foundation of Anhui Engineering Laboratory of Explosive Materials and Technology(AHBP2022A-02)
Appendix
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Year 2025 volume 42 Issue 1
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82
34
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Article Info
doi: 10.3963/j.issn.1001-487X.2025.01.005
  • Receive Date：2024-04-15
  • Online Date：2026-03-18
  • Published：2025-05-20
Article Data
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History
  • Received：2024-04-15
Funding
Open Foundation of Anhui Engineering Laboratory of Explosive Materials and Technology(AHBP2022A-02)
Affiliations
    1.China Communications Second Highway Engineering Bureau Limited Company, Xi'an 710000, China
    2.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China

Corresponding:

WANG Hai-bo(1983-), male, Ph. D, professor, doctoral supervisor, mainly engaged in research on blasting theory and technology, as well as impact dynamics, (E-mail) .
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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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