Stress Attenuation and Energy Absorption of the Coral Sand with Different Particle Sizes under Impacts

Proceedings

Fang, Qin¹  Chen, Wuzheng²  Chen, Li³  Yu, Xiao⁴ 

[1] Author to whom correspondence should be addressed.;Presented at the 18th International Conference on Experimental Mechanics, Brussels, Belgium, 1–5 July 2018.;Shanghai Communications Water Transportation Design and Research Co., Ltd., Shanghai 200092, China;State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China

关键词: coral s;    particle size;    stress wave attenuation;    energy absorption;    SHPB;   

DOI  :  10.3390/ICEM18-05440

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The stress wave attenuation and energy absorption in the coral sand were respectively investigated. A series of experiments were carried out by using a new methodology with an improved split Hopkinson pressure bar (SHPB). Four types of coral sand, i.e., particle sizes of 1.18–0.60 mm, 0.60–0.30 mm, 0.30–0.15 mm, and 0.15–0.075 mm, were carefully sieved and tested. Significant effects of coral sand on stress wave attenuation and energy absorption were observed. Correlation between stress wave attenuation and energy absorption of coral sand was validated. Conclusions on particle size effect of stress wave attenuation and energy absorption, which support each other, were drawn. There existed a common critical stress zone for coral sand with different particle sizes. When the stress below this zone, sand with small particle sizes attenuates stress wave better and absorb energy more; when the stress beyond this zone, sand with larger particle sizes behave better on stress wave attenuation and energy absorption.

【 授权许可】

CC BY