珊瑚砂中应力波衰减规律的实验研究

doi:10.13722/j.cnki.jrme.2018.0147

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Abstract To find out the attenuation of stress wave in the dried coral sand，an experiment was carried out to the long specimen by using the improved split Hopkinson pressure bar(SHPB) device. The average velocity of stress wave in the coral sand was quantitatively measured，and a formula relating the attenuation rate of the peak stress to the propagating distance was proposed. The experimental results show that the stress wave attenuates in the coral sand significantly，the peak value of stress wave attenuates to 10% and 1% as the stress wave propagate to the distance of 75 and 225 mm，respectively. It is concluded that the peak stress velocity decreases with the propagating distance，and decreases with the decreasing of dimensionless peak stress. The comparison of experimental results with the current specification and standard shows a much greater attenuation effect of stress wave in the coral sand than in the terrigenous sand.

Key words： soil mechanics coral sand stress wave attenuation split Hopkinson pressure bar(SHPB)

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	YU Xiao1
	2
	CHEN Li1
	2
	FANG Qin2

Cite this article:

YU Xiao1,2,CHEN Li1, et al. Experimental study on the attenuation of stress wave in coral sand[J]. , 2018, 37(6): 1520-1529.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0147 OR http://www.rockmech.org/EN/Y2018/V37/I6/1520

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