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- Title
Research on Wave Dissipation and Energy Absorption Characteristics of Different Boundary Materials Under Static–Dynamic Coupling Loading.
- Authors
Zeng, S. J.; Huang, L. Q.; Liu, H. L.; Chen, J. Z.; Li, X. B.
- Abstract
According to the scientific research needs of deep multi-field coupling true triaxial compression testing machines, it is necessary to find a suitable boundary material to be placed between the rock and the transmission bar to achieve the effects of wave elimination and energy absorption. This enables the conditions of the test requirements to be met under the interaction of true triaxial and strong disturbance. Therefore, the improved split Hopkinson pressure bar (SHPB) device was used to carry out a series of experiments on the wave elimination and energy absorption characteristics of different boundary materials, and to study the energy evolution characteristics and stress wave propagation laws of different materials under static–dynamic coupling loading. The results show that under single impact loading, owing to the difference in wave impedance between the material and the rock rod, the porous material will not only reflect the tensile wave that has a greater impact on the rock rod, but also its weakening effect on the reflection stress is weaker than that of the wave-absorbing metal plate. In terms of overall energy conversion, the energy absorption rate of the porous material PM-1 is superior, and the conversion rate of the reflection and transmission energies is also greatly reduced. Under the impact of cyclic loading, the reflection stress of the wave-absorbing metal plate increased slightly with an increase in the number of impacts. However, with the increase of impact times, the reflection peak stress of porous material PM-1 decreases at first and then increases, and the reflected wave changes from tensile wave to compression wave, which is not as good as that of wave dissipation metal plate in terms of repeatability and fatigue resistance.
- Subjects
WAVE energy; ENERGY dissipation; DEAD loads (Mechanics); FATIGUE limit; LONGITUDINAL waves; THEORY of wave motion; STRESS waves
- Publication
International Journal of Structural Stability & Dynamics, 2023, Vol 23, Issue 13, p1
- ISSN
0219-4554
- Publication type
Article
- DOI
10.1142/S0219455423501493