|
|
|
| Experimental study on the attenuation of stress wave in coral sand |
| YU Xiao1，2，CHEN Li1，2，FANG Qin2 |
| (1. State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact，Army Engineering University，Nanjing，Jiangsu 210007，China；2. Unit 61489，Luoyang，Henan 471023，China) |
|
|
|
|
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.
|
|
|
|
|
|
[1] 王明洋，崔传安. 爆炸波通过颗粒介质传播规律的数值分析方法研究[J]. 工程兵工程学院学报，1997，(4)：77–85.(WANG Mingyang，CUI Chuan?an. Numerical analytical method for explosive wave propagation in granular media[J]. Journal of Nanjing Engineering Institute，1997，(4)：77–85.(in Chinese))
[2] 孙其诚，王光谦. 颗粒物质力学导论[M]. 北京：科学出版社，2009：1–3.(SUN Qicheng，WANG Guangqian. Introduction to particle mechanics[M]. Beijing：Science Press，2009：1–3.(in Chinese))
[3] 季顺迎，李鹏飞，陈晓东. 冲击荷载下颗粒物质缓冲性能的试验研究[J]. 物理学报，2012，61(18)：301–307.(JI Shunying，LI Pengfei，CHEN Xiaodong. Experiments on shock-absorbing capacity of granular matter under impact load[J]. Acta Physica Sinica，2012，61(18)：301–307.(in Chinese))
[4] 陈亚红，白春华，王仲琦，等. 爆炸平面冲击波在金属颗粒介质中的衰减[J]. 高压物理学报，2011，25(6)：481–486.(CHEN Yahong，BAI Chunhua，WANG Zhongqi，et al. Planar explosion shock wave attenuationin granular metal[J]. Chinese Journal of High Pressure Physics，2011，25(6)：481–486.(in Chinese))
[5] HAMPTON D，WETZEL R A. Stress wave propagation in confined soils[R]. IIT Research Institute Technology Center，1966.
[6] SEAMAN L. One-dimensional stress wave propagation in soils[R]. [S. l.]：Defense Atomic Support Agency，1966.
[7] MCNEILL R L. A study of the propagation of stress waves in sand[R]. [S. l.]：The Eric H. Wang Civil Engineering Research Facility，1966.
[8] ROSS C A，THOMPSON P Y，CHARLIE W A，et al. Transmission of pressure waves in partially saturated soils[J]. Experimental Mechanics，1989，29(1)：80–83.
[9] ROSS C A，NASH P T，FRIESENHAHN G J. Pressure waves in soils using a split-Hopkinson pressure bar[R]. [S. l.]：Southwest Research Institute，1986.
[10] 赵跃堂，郑守军，郑大亮，等. 爆炸波在饱和土介质中传播时压力变化规律的试验研究[J]. 防灾减灾工程学报，2004，24(1)：60–65.(ZHAO Yuetang，ZHENG Shoujun，ZHENG Daliang，et al. Experimental investigation on pressure variation during explosion wave propagation in saturated soils[J]. Journal of Disaster Prevention and Mitigation Engineering，2004，24(1)：60–65.(in Chinese))
[11] 赵 凯. 分层防护层对爆炸波的衰减和弥散作用研究[博士学位论文][D]. 合肥：中国科学技术大学，2007.(ZHAO Kai. The attenuation and dispersion effects on explosive wave of layered protective engineering[Ph. D. Thesis][D]. Hefei：University of Science and Technology of China，2007.(in Chinese))
[12] LI J C，MA G W. Experimental study of stress wave propagation across a filled rock joint[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(3)：471–478.
[13] 穆朝民，任辉启，李永池，等. 爆炸波在高饱和度饱和土中传播规律的研究[J]. 岩土力学，2010，31(3)：875–880.(MU Chaomin，REN Huiqi，LI Yongchi，et al. Propagation laws of blast wave in saturated soils with high saturation degree[J]. Rock and Soil Mechanics，2010，31(3)：875–880.(in Chinese))
[14] LI X M，WANG M，GUO X，et al. Measurement of stress attenuation effect in the sand under explosion wave[J]. Applied Mechanics and Materials，2014，556–562：3 187–3 190.
[15] SHUKLA A，DAMANIA C. Experimental investigation of wave velocity and dynamic contact stresses in an assembly of disks[J]. Experimental Mechanics，1987，27(3)：268–281.
[16] LV Y，LI F，LIU Y，et al. Comparative study of coral sand and silica sand in creep under general stress states[J]. Canadian Geotechnical Journal，2016，54(11)：1–38.
[17] 徐学勇. 饱和钙质砂爆炸响应动力特性研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2009.(XU Xueyong. Study on dynamic behavior of saturated calcareous soil due to explosion[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2009.(in Chinese))
[18] 中华人民共和国行业标准编写组. SL237—1999 土工试验规程[S]. 北京：中国水利水电出版社，1999.(The Professional Standards Compilation Group of People?s Republic of China. SL237—1999 Specification of soil test[S]. Beijing：China Water Power Press，1999.(in Chinese))
[19] LADE P V，LIGGIO JR C D，NAM J. Strain rate，creep，and stress drop-creep experiments on crushed coral sand[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，135(7)：941–953.
[20] 王礼立. 应力波基础[M]. 北京：国防工业出版社，1985：45–47.(WANG Lili. Foundation of stress Waves[M]. Beijing：National Defense Industry Press，1985：45–47.(in Chinese))
[21] 方 秦，柳锦春. 地下防护结构[M]. 北京：中国水利水电出版社，2010：72–115.(FANG Qin，LIU Jinchun. Underground protective structure[M]. Beijing：China Water and Power Press，2010：72–115.(in Chinese))
[22] KRAUTHAMMER T. Modern protective structures[M]. Boca Raton：CRC Press，2008：129–135.
[23] Department of the Army. TM5-855-1 Fundamentals of protective design for conventional weapons[S]. [S. l.]：Department of the Army，1986.
[24] OMIDVAR M，ISKANDER M，BLESS S. Stress-strain behavior of sand at high strain rates[J]. International Journal of Impact Engineering，2012，49(11)：192–213.
[25] 张克恭，刘松玉. 土力学[M]. 武汉：建筑工业出版社，2006：36–38.(ZHANG Kegong，LIU Songyu. Soil mechanics[M]. Wuhan：China Architecture and Building Press，2006：36–38.(in Chinese))
[26] 孙宗勋. 南沙群岛珊瑚砂工程性质研究[J]. 热带海洋学报，2000，19(2)：1–8.(SUN Zongxun. Engineering properties of coral sands in Nansha Islands[J]. Tropic Oceanology，2000，19(2)：1–8.(in Chinese))
|
|
|
|
2018, Vol. 37 
