首页|Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests
Dynamic mechanical properties and wave propagation of composite rock-mortar specimens based on SHPB tests
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Filled inclusions in rock discontinuities play a key role in the mechanical characteristics of the rock and thereby influence the stability of rock engineering.In this study,a series of impact tests were performed using a split Hopkinson pressure bar system with high-speed photography to investigate the effect of interlayer strength on the wave propagation and fracturing process in composite rock-mortar specimens.The results indicate that the transmission coefficient,nominal dynamic strength,interlayer closure,and specific normal stiffness generally increase linearly with increasing interlayer stiffness.The cement mor-tar layer can serve as a buffer during the deformation of composite specimens.The digital images show that tensile cracks are typically initiated at the rock-mortar interface,propagate along the loading direc-tion,and eventually result in a tensile failure regardless of the interlayer properties.However,when a relatively weaker layer is sandwiched between the rock matrix,an increasing amount of cement mortar is violently ejected and slight slabbing occurs near the rock-mortar interface.
Rock dynamicsWave propagationRock-mortarStiffnessEnergyFracturing
Zhenyu Han、Diyuan Li、Xibing Li
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School of Resources and Safety Engineering,Central South University,Changsha 410083,China
School of Civil Engineering,Southeast University,Nanjing 210096,China
Department of Civil Engineering,Monash University,Melbourne,Victoria 3800,Australia
NETL
NSTL
万方数据
维普
