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A modified split Hopkinson torsional bar system for correlated study of tau-gamma relations, shear localization and microstructural evolution
R. Yang; H. S. Zhang; L. T. Shen; Y. B. Xu; Y. L. Bai; B. Dodd
2014
Source PublicationPhilosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences
ISSN1364-503X
Volume372Issue:2015
AbstractThe conventional split Hopkinson torsional bar (SHTB) system consists of two bars, which can successfully produce the data for the construction of dynamic torsional shear stress and strain relationships. However, the system cannot provide reliable information on the progression of the deformed microstructure during the test. The reverberation of waves in the bars and the tested specimen can spoil the microstructural pattern formed during the effective loading. This paper briefly reviews a modified version of the SHTB system consisting of four bars that has been developed. This modified system can eliminate the reverberation of waves in the specimen and provide only a single rectangular torsional stress pulse, thus it can properly freeze the microstructure formed during the effective period of loading in the specimen. By using the advantage of the modified SHTB system, together with a new design of specimen, it is possible to perform a correlated study of the dynamic stress-strain response, shear localization and the evolution of the microstructure at a fixed view-field (position) on a given specimen during the sequence of the loading time. The principles, experimental set-up and procedure, calibration and some preliminary results of the correlated study are reported in this paper.
description.department[yang, rong ; zhang, husheng ; shen, letian ; bai, yilong] chinese acad sci, inst mech, state key lab nonlinear mech, beijing 100190, peoples r china. [xu, yongbo] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [dodd, bradley] univ london imperial coll sci technol & med, inst shock phys, london sw7 2az, england. ; yang, r (reprint author), chinese acad sci, inst mech, state key lab nonlinear mech, beijing 100190, peoples r china. ; yangr@lnm.imech.ac.cn
KeywordModified Split Hopkinson Torsional Bars Shear Localization Microstructural Evolution High-strain Rates Adiabatic Shear Band Formation Rate Deformation Steel Instability
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72952
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
R. Yang,H. S. Zhang,L. T. Shen,et al. A modified split Hopkinson torsional bar system for correlated study of tau-gamma relations, shear localization and microstructural evolution[J]. Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences,2014,372(2015).
APA R. Yang,H. S. Zhang,L. T. Shen,Y. B. Xu,Y. L. Bai,&B. Dodd.(2014).A modified split Hopkinson torsional bar system for correlated study of tau-gamma relations, shear localization and microstructural evolution.Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences,372(2015).
MLA R. Yang,et al."A modified split Hopkinson torsional bar system for correlated study of tau-gamma relations, shear localization and microstructural evolution".Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences 372.2015(2014).
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