Experimental investigation on shock mechanical properties of red sandstone under preloaded 3D static stresses

Yong, Niu, Kegang, Li, Deke, Liu, Xianglong, Li and Shoujian, Peng (2015) Experimental investigation on shock mechanical properties of red sandstone under preloaded 3D static stresses. Journal of Engineering Science and Technology Review, 8 5: 205-211.

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Author Yong, Niu
Kegang, Li
Deke, Liu
Xianglong, Li
Shoujian, Peng
Title Experimental investigation on shock mechanical properties of red sandstone under preloaded 3D static stresses
Journal name Journal of Engineering Science and Technology Review   Check publisher's open access policy
ISSN 1791-2377
1791-9320
Publication date 2015-01-01
Year available 2015
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 8
Issue 5
Start page 205
End page 211
Total pages 7
Place of publication Kavala, Greece
Publisher Technological Education Institute of Kavala
Language eng
Abstract Triaxial impact mechanical performance experiment was performed to study the mechanical properties of red sandstone subjected to three-dimensional (3D) coupled static and dynamic loads, i.e., three confining pressures (0, 5, and 10 MPa) and three axial pressures (11, 27, and 43 MPa). A modified 3D split Hopkinson pressure bar testing system was used. The change trend in the deformation of red sandstone and the strength and failure modes under axial pressures and confining pressures were analyzed. Results show that, when the confining pressure is constant, the compressive strength, secant modulus, and energy absorbed per unit volume of red sandstone initially increases and subsequently decreases, whereas the average strain rate exhibits an opposite trend. When the axial pressure is constant, both the compressive strength and secant modulus of red sandstone are enhanced, but the average strain rate is decreased with increasing confining pressure. The energy absorbed per unit volume is initially increased and subsequently decreased as the confining pressure increases. Red sandstone exhibits a cone-shaped compression–shear failure mode under the 3D coupled static and dynamic loads. The conclusions serve as theoretical basis on the mechanical properties of deep medium-strength rock under a high ground stress and external load disturbance condition.
Keyword Rock mechanics
Shock mechanical properties
3D coupled static and dynamic loads
Strain rate
Failure mode
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Engineering Publications
 
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