Dynamic behaviors and energy dissipation characteristics of marble under cyclic impact loading

WANG Zhiliang; WANG Dawei; WANG Shumin; WU Xutao

doi:10.11883/bzycj-2023-0243

Volume 44 Issue 4

Apr. 2024

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WANG Zhiliang, WANG Dawei, WANG Shumin, WU Xutao. Dynamic behaviors and energy dissipation characteristics of marble under cyclic impact loading[J]. Explosion And Shock Waves, 2024, 44(4): 043104. doi: 10.11883/bzycj-2023-0243

Citation:

WANG Zhiliang, WANG Dawei, WANG Shumin, WU Xutao. Dynamic behaviors and energy dissipation characteristics of marble under cyclic impact loading[J]. Explosion And Shock Waves, 2024, 44(4): 043104. doi: 10.11883/bzycj-2023-0243

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Dynamic behaviors and energy dissipation characteristics of marble under cyclic impact loading

doi: 10.11883/bzycj-2023-0243

School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

Received Date: 2023-07-10
Rev Recd Date: 2024-01-10

Available Online: 2024-01-16

Publish Date: 2024-04-07

Abstract

Abstract

In order to study the dynamic behaviors and energy dissipation characteristics of marble under cyclic impact loading, a split Hopkinson pressure bar system was first adopted to determine the five representative incident velocities of striking projectile through the trial impact method. Based on this, constant amplitude cyclic impact tests of the marble samples were performed, and stress uniformity of the samples was examined. Then, a systematic analysis is conducted on the test data from the aspects of strain rate time history curve, stress-strain relationship, impact times and energy dissipation properties. Finally, a damage variable is defined based on the energy evolution, and the associated mechanism between energy dissipation and damage development of the rock samples is further explored. The results show that the time-history curves of the strain rate of the samples exhibit a plateau segment with a constant rate of change at low projectile velocities, and the stress-strain curve has a certain rebound at the post-peak stage. The peak stress of the rock samples decreases with the increase of the number of cycles, while the peak strain, average strain rate and cumulative absorption specific energy take on the opposite trend, and their change rates all show a sudden increase phenomenon before sample’s break or fracture. The peak stress has a linear relationship with the average strain rate, while the variation of sample elastic modulus with average strain rate generally follows an exponential decay law. There is a positive linear correlation between the dissipated specific energy and the average strain rate of the marble samples. The damage variable defined based on energy dissipation analysis can better characterize the break or fracture process of the marble samples under dynamic loading. The research results of this study have certain reference value for revealing the evolution mechanism of rock internal damage under cyclic load disturbance.
- marble,
- cyclic impact,
- dynamic characteristics,
- energy dissipation,
- damage evolution

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References(27)

References

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