Experimental Investigation of the Relationship between the P-Wave Velocity and the Mechanical Properties of Damaged Sandstone

Abstract

To obtain an improved and more accurate understanding of the relationship between the P-wave velocity and the mechanical properties of damaged sandstone, uniaxial compression tests were performed on sandstone subjected to different high-temperature treatments or freeze-thaw (F-T) cycles. After high-temperature treatment, the tests showed a generally positive relationship between the P-wave velocity and mechanical characteristics, although there were many exceptions. The mechanical properties showed significant differences for a given P-wave velocity. Based on the mechanical tests after the F-T cycles, the mechanical properties and P-wave velocities exhibited different trends. The UCS and Young’s modulus values slightly decreased after 30, 40, and 50 cycles, whereas both an increase and a decrease occurred in the P-wave velocity. The UCS, Young’s modulus, and P-wave velocity represent different macrobehaviors of rock properties. A statistical relationship exists between the P-wave velocity and mechanical properties, such as the UCS and Young’s modulus, but no mechanical relationship exists. Further attention should be given to using the P-wave velocity to estimate and predict the mechanical properties of rock.

Polyimides as Promising Materials for Lithium-Ion Batteries: A Review

“…Though the applications of PIs are diverse, they are still confined to the laboratory and far away from commercialization. PIs are formed from anhydride and amine polycondensations [ 17 ]. PIs have been in development since their introduction in 1955.…”

Mechanical Properties of Metasandstone under Uniaxial Graded Cyclic Loading and Unloading

“…In the study of wave velocity characteristics of rock, Charalampos saroglou studied the influence of the granite fracture degree on P-wave and S-wave velocity [17]. Q. Ding studied the relationship between P-wave velocity and mechanical properties of sandstone treated by a high temperature and freeze-thaw cycle [18]. L. Yang studied the evolution law of acoustic spectrum parameters of granite in the process of uniaxial compression loading failure, and found that, when the shear wave shifts from the broadband multimodal state to the low-frequency unimodal state, it means that the rock sample is about to be destroyed [19].…”

Variation in Anisotropy with Dehydration in Layered Sandstone

“…Ultrasonic testing is convenient and rapid and is commonly used to study anisotropy in rocks. The ultrasonic wave velocity is well correlated with the mechanical parameters of rocks [18][19][20]. Ultrasonic testing has been used to study anisotropic changes in rock under different load conditions, such as fatigue load [17,21], impact load [22] and static load [23], and under different environmental conditions, such as high temperatures [24], freeze-thaw cycling [25] and dry-wet cycling [26].…”