Experimental study on the slip evolution of planar fractures subjected to cyclic normal stress

K Tao, W Dang, X Liao, X Li - International Journal of Coal Science & …, 2023 - Springer
The frictional rupture mechanisms of rock discontinuities considering the dynamic load
disturbance still remain unclear. This paper investigates the transitional behaviors of slip …

Determining rock crack stress thresholds using ultrasonic through-transmission measurements

J He, M Serati, M Veidt, A De Alwis - International Journal of Coal Science …, 2024 - Springer
The crack initiation stress threshold is widely used in excavation industries as rock spalling
strength when designing deep underground structures to avoid unwanted brittle failures …

Stress Dependency of Brittle Creep in Granite: Insights into Source Mechanisms and Parameters

S Zafar, A Hedayat, O Moradian - Rock Mechanics and Rock Engineering, 2024 - Springer
Creep in rocks refers to the gradual deformation of rock material over time under the
influence of constant stress. Characterizing these deformations is of great importance for …

Microseismic monitoring of laboratory hydraulic fracturing experiments in granitic rocks for different fracture propagation regimes

A Butt, A Hedayat, O Moradian - Rock Mechanics and Rock Engineering, 2024 - Springer
While hydraulic fracturing (HF) is a widely employed process, the underlying fracturing
processes are still heavily contested. The attributes of the HF generated fracture network can …

Energy budget of brittle fracturing in granite under stress relaxation and creep

S Zafar, A Hedayat, O Moradian - Rock Mechanics and Rock Engineering, 2024 - Springer
Creep and relaxation are the two major time-dependent fracturing processes in rocks. While
a considerable amount of research has been done in understanding these two mechanisms …

Statistical structural integrity control of composite structures based on an automatic operational modal analysis—A review

R Janeliukstis, D Mironovs, A Safonovs - Mechanics of Composite …, 2022 - Springer
The operational modal analysis (OMA), as a passive technique, has found a practical
application in the structural health monitoring (SHM) of structures in service subjected to …

An embedded ultrasonic sensor for monitoring acoustic emissions in laboratory earthquake experiments

R Xu, P Dong, Y Xu, K Xia - Measurement, 2022 - Elsevier
The monitoring of acoustic emissions (AEs) is one of the most effective means to study the
source mechanisms of laboratory earthquakes. However, conventional AE monitoring …

Laboratory acousto-mechanical study into moisture-induced changes of elastic properties in intact granite

R Wu, PA Selvadurai, Y Li, Y Sun, K Leith… - International Journal of …, 2023 - Elsevier
The water adsorption into pore spaces in brittle rocks affects wave velocity and transmitted
amplitude of elastic waves. Experimental and theoretical studies have been performed to …

Laboratory Acousto‐Mechanical Study Into Moisture‐Induced Reduction of Fracture Stiffness in Granite

R Wu, PA Selvadurai, Y Li, K Leith… - Geophysical …, 2023 - Wiley Online Library
Water infiltration into fractures is ubiquitous in crustal rocks. However, little is known about
how such a progressive wetting process affects fracture stiffness and seismic wave …

A methodology for reconstructing source properties of a conical piezoelectric actuator using array-based methods

PA Selvadurai, R Wu, P Bianchi, Z Niu… - Journal of …, 2022 - Springer
We investigated the force produced by a conical piezoelectric (PZT, lead zirconate titanate)
transducer actuated by high voltage pulses (HVP) in contact with a steel transfer plate. Using …