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During testing low impedance materials (so-called soft materials) by a conventional split Hopkinson pressure bar (SHPB), the transmission strain pulse is too weak to be collected correctly. In addition, the soft material specimen will not deform homogeneously during the testing, which makes it impossible to get valid data. In this paper, a polyurethane foam material was tested by SHPB using a quartz transducer technique. The stress equilibrium in the specimen was monitored by quartz transducer mounted at two end faces of the specimen. Experimental results showed that the amplitude of transmitted signals were increased greatly. Meanwhile, we used a pulse-shaper technique to increase the rise time of the incident pulse, which could ensure stress equilibrium and homogeneous deformation in the specimen. Compressive stress-strain behaviors of the foam showed that there was little effects of strain rates on the material properties at strain-rate of 1 000~4 000 s-1.

, authors=Yu-Liang LIN, Fang-Yun LU, Li LU, authorsList=Yu-Liang LIN, Fang-Yun LU, Li LU, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1323703397773358040, articleId=1323703397429425110, tenantId=1146029695717560320, journalId=1255847867265597444, language=CN, title=石英压电晶体在霍普金森压杆实验中的应用, columnId=0, journalTitle=高压物理学报, columnName=, runingTitle=null, highlight=null, articleAbstract=

利用传统分离式霍普金森压杆(SHPB)对低密度、低波阻材料进行测试时,存在透射信号弱、试样在加载时间内难以达到受力变形均匀的不足。采用嵌入压电石英晶体技术测试微弱的透射信号,并监测试样两端应力平衡。实验测试了一种低密度聚氨酯泡沫,结果表明嵌入压电石英晶体技术可以大幅提高透射信号的幅值和信噪比,所测试的材料在应变率范围1 000~4 000 s-1内应变率效应不明显。

, authors=林玉亮, 卢芳云, 卢力, authorsList=林玉亮, 卢芳云, 卢力, authorCompany=null, correspAuthors=null, authorNote=

林玉亮(1978—),男,博士研究生. E-mail:

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林玉亮(1978—),男,博士研究生. E-mail:

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林玉亮(1978—),男,博士研究生. E-mail:

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石英压电晶体在霍普金森压杆实验中的应用
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林玉亮 , 卢芳云 , 卢力
高压物理学报 | 2005,19(4): 299-304
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高压物理学报 | 2005 , 19 (4) : 299 -304
石英压电晶体在霍普金森压杆实验中的应用
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林玉亮 , 卢芳云, 卢力
作者信息
  • 国防科技大学理学院技术物理研究所,湖南 长沙 410073
作者简介:

林玉亮(1978—),男,博士研究生. E-mail:

The Application of Quartz Transducer Technique in SHPB
Yu-Liang LIN , Fang-Yun LU, Li LU
Affiliations
  • Department of Applied Physics, National University of Defense Technology, Changsha 410073, China
出版时间: 2005-12-05
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利用传统分离式霍普金森压杆(SHPB)对低密度、低波阻材料进行测试时,存在透射信号弱、试样在加载时间内难以达到受力变形均匀的不足。采用嵌入压电石英晶体技术测试微弱的透射信号,并监测试样两端应力平衡。实验测试了一种低密度聚氨酯泡沫,结果表明嵌入压电石英晶体技术可以大幅提高透射信号的幅值和信噪比,所测试的材料在应变率范围1 000~4 000 s-1内应变率效应不明显。

SHPB  /  石英压电晶体  /  软材料  /  高应变率

During testing low impedance materials (so-called soft materials) by a conventional split Hopkinson pressure bar (SHPB), the transmission strain pulse is too weak to be collected correctly. In addition, the soft material specimen will not deform homogeneously during the testing, which makes it impossible to get valid data. In this paper, a polyurethane foam material was tested by SHPB using a quartz transducer technique. The stress equilibrium in the specimen was monitored by quartz transducer mounted at two end faces of the specimen. Experimental results showed that the amplitude of transmitted signals were increased greatly. Meanwhile, we used a pulse-shaper technique to increase the rise time of the incident pulse, which could ensure stress equilibrium and homogeneous deformation in the specimen. Compressive stress-strain behaviors of the foam showed that there was little effects of strain rates on the material properties at strain-rate of 1 000~4 000 s-1.

SHPB  /  quartz transducer  /  soft material  /  high strain rate
林玉亮, 卢芳云, 卢力. 石英压电晶体在霍普金森压杆实验中的应用. 高压物理学报, 2005 , 19 (4) : 299 -304 .
Yu-Liang LIN, Fang-Yun LU, Li LU. The Application of Quartz Transducer Technique in SHPB[J]. Chinese Journal of High Pressure Physics, 2005 , 19 (4) : 299 -304 .
  • 国家自然科学基金(10172092)
  • NSAF联合基金(10276038)
参考文献 引证文献
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Liu J F, Wang Z D, Hu S S. The SHPB Experiment Technology for Low Wave Impedance Porous Materials[J]. J ExpMech, 1998, 13(2): 218-223. (in Chinese)
刘剑飞, 王正道, 胡时胜. 低阻抗多孔材料的SHPB实验技术[J]. 实验力学, 1998, 13(2): 218-223.
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Chen W, Lu F, Zhou B. A Quartz-Crystal-Embedded Split Hopkinson Pressure Bar for Soft Materials[J]. Exp Mech, 2000, 40(1): 1-6.
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Nemat-Nasser S, Isaacs J B, Starrett J E. Hopkinson Techniques for Dynamic Recovery Experiments[J]. Proceedings of the Royal Society of London, 1991, 435(A): 371-391.
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Wang H X, Zhang S Y. Theory and Application of Transducer[M]. Tianjin: Tianjin University Press, 1988. 171-174. (in Chinese)
王化祥, 张淑英. 传感器原理及应用[M]. 天津: 天津大学出版社, 1988. 171-174.
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李远, 秦自楷, 周志刚. 压电与铁材料的测量[M]. 北京: 科学出版社, 1984. 329-330.
2005年第19卷第4期
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  • 接收时间:2004-11-30
  • 首发时间:2026-11-01
  • 出版时间:2005-12-05
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  • 收稿日期:2004-11-30
  • 修回日期:2005-01-27
基金
国家自然科学基金(10172092)
NSAF联合基金(10276038)
作者信息
    国防科技大学理学院技术物理研究所,湖南 长沙 410073
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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