Elimination of loading reverberation in the split hopkinson torsional bar

CORC > 力学研究所 > 中国科学院力学研究所 > 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
刊名	Review of Scientific Instruments
	1995
卷号	66 期号:11 页码:5298-5304
关键词	1100-0 Aluminum Strain-Rate Stress
ISSN号	0034-6748
通讯作者	XUE, Q (reprint author), CHINESE ACAD SCI, INST MECH, NONLINEAR MECH CONTINUOUS MEDIA LAB, BEIJING 100080, PEOPLES R CHINA.
中文摘要	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.
类目[WOS]	Instruments & Instrumentation ; Physics, Applied
研究领域[WOS]	Instruments & Instrumentation ; Physics
关键词[WOS]	1100-0 ALUMINUM ; STRAIN-RATE ; STRESS
收录类别	SCI
语种	英语
WOS记录号	WOS:A1995TE62300030
公开日期	2009-08-03 ; 2010-08-20
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/39182]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Xue Q,Shen LT,Bai TL. 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.(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.