Dynamic Fracture Characteristic of Sandstone After High Temperature

Jianlei Chen; Yanbing Wang; Baozhu Wang

doi:doi:10.11648/j.ajmie.20210606.11

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Dynamic Fracture Characteristic of Sandstone After High Temperature

Jianlei Chen, Yanbing Wang, Baozhu Wang

Published in American Journal of Mechanical and Industrial Engineering (Volume 6, Issue 6)

Received: 11 November 2021 Accepted: 29 November 2021 Published: 7 December 2021

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Abstract

The increase of deep underground works has led to many concerns in relation to the dynamic characteristics of rocks subject to heating treatment, including underground rock blasting. For revelation of the dynamic mechanical properties of rocks subject to heating treatment, the sandstone treated after 22°C, 150°C, 300°C, 450°C, 600°C, and 750°C respectively were subject to dynamic fracture toughness tests using Split Hopkinson Pressure Bar (SHPB). After reaching the set temperature, it is maintained for 30 min and then cooled for 24 h to normal temperature. the morphology of microcracks on the surface of sandstone samples due to thermodynamic action was observed by electron microscope scanning (sem). The P wave velocity of rock samples after high temperature is measured, and the results can be correlated with scanning electron microscope images. Finally, the relationship between temperature and dynamic fracture toughness is analyzed. Results showed: when the loading rate was lower (<50GPa•m^1/2s^-1), the fracture toughness values corresponding to different temperatures of heat treatment tended to be closer with each other. However, when the loading rate was higher, the fracture toughness values varied greatly. Under certain special loading rates that are the same, the fracture toughness of sandstone at 300°C is about 6% higher than at 150°C. This can be attributed that the expansion of minerals at high temperature results in the closure of original cracks in the rocks, the change in internal structure of rocks, and the increased fracture toughness.

Published in	American Journal of Mechanical and Industrial Engineering (Volume 6, Issue 6)
DOI	10.11648/j.ajmie.20210606.11
Page(s)	81-89
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

High Temperature, The Dynamic Fracture Toughness, P Wave, Scanning Electron Microscopy (SEM)

References

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APA Style

Jianlei Chen, Yanbing Wang, Baozhu Wang. (2021). Dynamic Fracture Characteristic of Sandstone After High Temperature. American Journal of Mechanical and Industrial Engineering, 6(6), 81-89. https://doi.org/10.11648/j.ajmie.20210606.11

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ACS Style

Jianlei Chen; Yanbing Wang; Baozhu Wang. Dynamic Fracture Characteristic of Sandstone After High Temperature. Am. J. Mech. Ind. Eng. 2021, 6(6), 81-89. doi: 10.11648/j.ajmie.20210606.11

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AMA Style

Jianlei Chen, Yanbing Wang, Baozhu Wang. Dynamic Fracture Characteristic of Sandstone After High Temperature. Am J Mech Ind Eng. 2021;6(6):81-89. doi: 10.11648/j.ajmie.20210606.11

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@article{10.11648/j.ajmie.20210606.11,
  author = {Jianlei Chen and Yanbing Wang and Baozhu Wang},
  title = {Dynamic Fracture Characteristic of Sandstone After High Temperature},
  journal = {American Journal of Mechanical and Industrial Engineering},
  volume = {6},
  number = {6},
  pages = {81-89},
  doi = {10.11648/j.ajmie.20210606.11},
  url = {https://doi.org/10.11648/j.ajmie.20210606.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmie.20210606.11},
  abstract = {The increase of deep underground works has led to many concerns in relation to the dynamic characteristics of rocks subject to heating treatment, including underground rock blasting. For revelation of the dynamic mechanical properties of rocks subject to heating treatment, the sandstone treated after 22°C, 150°C, 300°C, 450°C, 600°C, and 750°C respectively were subject to dynamic fracture toughness tests using Split Hopkinson Pressure Bar (SHPB). After reaching the set temperature, it is maintained for 30 min and then cooled for 24 h to normal temperature. the morphology of microcracks on the surface of sandstone samples due to thermodynamic action was observed by electron microscope scanning (sem). The P wave velocity of rock samples after high temperature is measured, and the results can be correlated with scanning electron microscope images. Finally, the relationship between temperature and dynamic fracture toughness is analyzed. Results showed: when the loading rate was lower (1/2s-1), the fracture toughness values corresponding to different temperatures of heat treatment tended to be closer with each other. However, when the loading rate was higher, the fracture toughness values varied greatly. Under certain special loading rates that are the same, the fracture toughness of sandstone at 300°C is about 6% higher than at 150°C. This can be attributed that the expansion of minerals at high temperature results in the closure of original cracks in the rocks, the change in internal structure of rocks, and the increased fracture toughness.},
 year = {2021}
}

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TY  - JOUR
T1  - Dynamic Fracture Characteristic of Sandstone After High Temperature
AU  - Jianlei Chen
AU  - Yanbing Wang
AU  - Baozhu Wang
Y1  - 2021/12/07
PY  - 2021
N1  - https://doi.org/10.11648/j.ajmie.20210606.11
DO  - 10.11648/j.ajmie.20210606.11
T2  - American Journal of Mechanical and Industrial Engineering
JF  - American Journal of Mechanical and Industrial Engineering
JO  - American Journal of Mechanical and Industrial Engineering
SP  - 81
EP  - 89
PB  - Science Publishing Group
SN  - 2575-6060
UR  - https://doi.org/10.11648/j.ajmie.20210606.11
AB  - The increase of deep underground works has led to many concerns in relation to the dynamic characteristics of rocks subject to heating treatment, including underground rock blasting. For revelation of the dynamic mechanical properties of rocks subject to heating treatment, the sandstone treated after 22°C, 150°C, 300°C, 450°C, 600°C, and 750°C respectively were subject to dynamic fracture toughness tests using Split Hopkinson Pressure Bar (SHPB). After reaching the set temperature, it is maintained for 30 min and then cooled for 24 h to normal temperature. the morphology of microcracks on the surface of sandstone samples due to thermodynamic action was observed by electron microscope scanning (sem). The P wave velocity of rock samples after high temperature is measured, and the results can be correlated with scanning electron microscope images. Finally, the relationship between temperature and dynamic fracture toughness is analyzed. Results showed: when the loading rate was lower (1/2s-1), the fracture toughness values corresponding to different temperatures of heat treatment tended to be closer with each other. However, when the loading rate was higher, the fracture toughness values varied greatly. Under certain special loading rates that are the same, the fracture toughness of sandstone at 300°C is about 6% higher than at 150°C. This can be attributed that the expansion of minerals at high temperature results in the closure of original cracks in the rocks, the change in internal structure of rocks, and the increased fracture toughness.
VL  - 6
IS  - 6
ER  -

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Author Information

Jianlei Chen

School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Yanbing Wang

School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Baozhu Wang

School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China

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Plain Text BibTeX RIS

APA Style

Jianlei Chen, Yanbing Wang, Baozhu Wang. (2021). Dynamic Fracture Characteristic of Sandstone After High Temperature. American Journal of Mechanical and Industrial Engineering, 6(6), 81-89. https://doi.org/10.11648/j.ajmie.20210606.11

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ACS Style

Jianlei Chen; Yanbing Wang; Baozhu Wang. Dynamic Fracture Characteristic of Sandstone After High Temperature. Am. J. Mech. Ind. Eng. 2021, 6(6), 81-89. doi: 10.11648/j.ajmie.20210606.11

Copy | Download

AMA Style

Jianlei Chen, Yanbing Wang, Baozhu Wang. Dynamic Fracture Characteristic of Sandstone After High Temperature. Am J Mech Ind Eng. 2021;6(6):81-89. doi: 10.11648/j.ajmie.20210606.11

Copy | Download

@article{10.11648/j.ajmie.20210606.11,
  author = {Jianlei Chen and Yanbing Wang and Baozhu Wang},
  title = {Dynamic Fracture Characteristic of Sandstone After High Temperature},
  journal = {American Journal of Mechanical and Industrial Engineering},
  volume = {6},
  number = {6},
  pages = {81-89},
  doi = {10.11648/j.ajmie.20210606.11},
  url = {https://doi.org/10.11648/j.ajmie.20210606.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmie.20210606.11},
  abstract = {The increase of deep underground works has led to many concerns in relation to the dynamic characteristics of rocks subject to heating treatment, including underground rock blasting. For revelation of the dynamic mechanical properties of rocks subject to heating treatment, the sandstone treated after 22°C, 150°C, 300°C, 450°C, 600°C, and 750°C respectively were subject to dynamic fracture toughness tests using Split Hopkinson Pressure Bar (SHPB). After reaching the set temperature, it is maintained for 30 min and then cooled for 24 h to normal temperature. the morphology of microcracks on the surface of sandstone samples due to thermodynamic action was observed by electron microscope scanning (sem). The P wave velocity of rock samples after high temperature is measured, and the results can be correlated with scanning electron microscope images. Finally, the relationship between temperature and dynamic fracture toughness is analyzed. Results showed: when the loading rate was lower (1/2s-1), the fracture toughness values corresponding to different temperatures of heat treatment tended to be closer with each other. However, when the loading rate was higher, the fracture toughness values varied greatly. Under certain special loading rates that are the same, the fracture toughness of sandstone at 300°C is about 6% higher than at 150°C. This can be attributed that the expansion of minerals at high temperature results in the closure of original cracks in the rocks, the change in internal structure of rocks, and the increased fracture toughness.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Dynamic Fracture Characteristic of Sandstone After High Temperature
AU  - Jianlei Chen
AU  - Yanbing Wang
AU  - Baozhu Wang
Y1  - 2021/12/07
PY  - 2021
N1  - https://doi.org/10.11648/j.ajmie.20210606.11
DO  - 10.11648/j.ajmie.20210606.11
T2  - American Journal of Mechanical and Industrial Engineering
JF  - American Journal of Mechanical and Industrial Engineering
JO  - American Journal of Mechanical and Industrial Engineering
SP  - 81
EP  - 89
PB  - Science Publishing Group
SN  - 2575-6060
UR  - https://doi.org/10.11648/j.ajmie.20210606.11
AB  - The increase of deep underground works has led to many concerns in relation to the dynamic characteristics of rocks subject to heating treatment, including underground rock blasting. For revelation of the dynamic mechanical properties of rocks subject to heating treatment, the sandstone treated after 22°C, 150°C, 300°C, 450°C, 600°C, and 750°C respectively were subject to dynamic fracture toughness tests using Split Hopkinson Pressure Bar (SHPB). After reaching the set temperature, it is maintained for 30 min and then cooled for 24 h to normal temperature. the morphology of microcracks on the surface of sandstone samples due to thermodynamic action was observed by electron microscope scanning (sem). The P wave velocity of rock samples after high temperature is measured, and the results can be correlated with scanning electron microscope images. Finally, the relationship between temperature and dynamic fracture toughness is analyzed. Results showed: when the loading rate was lower (1/2s-1), the fracture toughness values corresponding to different temperatures of heat treatment tended to be closer with each other. However, when the loading rate was higher, the fracture toughness values varied greatly. Under certain special loading rates that are the same, the fracture toughness of sandstone at 300°C is about 6% higher than at 150°C. This can be attributed that the expansion of minerals at high temperature results in the closure of original cracks in the rocks, the change in internal structure of rocks, and the increased fracture toughness.
VL  - 6
IS  - 6
ER  -

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