Elimination of loading reverberation in the split hopkinson torsional bar

doi:10.1063/1.1146102

IMECH-IR > 力学所知识产出(1956-2008)

	Elimination of loading reverberation in the split hopkinson torsional bar
	Xue Q(薛青); Shen LT(沈乐天); Bai TL; XUE, Q (reprint author), CHINESE ACAD SCI, INST MECH, NONLINEAR MECH CONTINUOUS MEDIA LAB, BEIJING 100080, PEOPLES R CHINA.
发表期刊	Review of Scientific Instruments
	1995
卷号	66 期号:11 页码:5298-5304
ISSN	0034-6748
摘要	The loading reverberation is a multiple wave effect on the specimen in the split Hopkinson torsional bar (SHTB). Its existence intensively destroys the microstructure pattern in the tested material and therefore, interferes with the study correlating the deformed microstructure to the macroscopic stress-strain response. This paper discusses the problem of the loading reverberation and its effects on the post-mortem observations in the SHTB experiment. The cause of the loading reverberation is illustrated by a stress wave analysis. The modification of the standard SHTB is introduced, which involves attaching two unloading bars at the two ends of the original main bar system and adopting a new loading head and a couple of specially designed clutches. The clutches are placed between the main bar system and the unloading bars in order to lead the secondary loading wave out of the main bar system and to cut off the connection in a timely manner. The loading head of the standard torsional bar was redesigned by using a tube-type loading device associated with a ratchet system to ensure the exclusion of the reflected wave. Thus, the secondary loading waves were wholly trapped in the two unloading bars. The wave recording results and the contrasting experiments for examining the post-mortem microstructure during shear banding both before and after the modification highly support the effectiveness of the modified version. The modified SHTB realizes a single wave pulse loading process and will become a useful tool for investigating the relation between the deformed microstructure and the macroscopic stress-strain response. It will play an important role especially in the study of the evolution of the microstructure during the shear banding process. (C) 1995 American Institute of Physics.
关键词	1100-0 Aluminum Strain-rate Stress
DOI	10.1063/1.1146102
收录类别	SCI
语种	英语
WOS记录号	WOS:A1995TE62300030
关键词[WOS]	1100-0 ALUMINUM ; STRAIN-RATE ; STRESS
WOS研究方向	Instruments & Instrumentation ; Physics
WOS类目	Instruments & Instrumentation ; Physics, Applied
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/39182
专题	力学所知识产出(1956-2008)
通讯作者	XUE, Q (reprint author), CHINESE ACAD SCI, INST MECH, NONLINEAR MECH CONTINUOUS MEDIA LAB, BEIJING 100080, PEOPLES R CHINA.
推荐引用方式 GB/T 7714	Xue Q,Shen LT,Bai TL,et al. Elimination of loading reverberation in the split hopkinson torsional bar[J]. Review of Scientific Instruments,1995,66,11,:5298-5304.
APA	薛青,沈乐天,Bai TL,&XUE, Q .(1995).Elimination of loading reverberation in the split hopkinson torsional bar.Review of Scientific Instruments,66(11),5298-5304.
MLA	薛青,et al."Elimination of loading reverberation in the split hopkinson torsional bar".Review of Scientific Instruments 66.11(1995):5298-5304.

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