The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate

Yuan Xu; Lukasz Farbaniec; Clive Siviour; Daniel Eakins; Antonio Pellegrino

doi:10.1007/978-3-030-59947-8_16

The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate

Yuan Xu, Lukasz Farbaniec, Clive Siviour, Daniel Eakins, Antonio Pellegrino

University of Oxford

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

12 Citations (SciVal)

Abstract

A novel Tension-Torsion Split Hopkinson Bar apparatus conceived to achieve an arbitrary combination of tension and shear at high strain rates in a single loading event is proposed. The apparatus allows for the population of the failure and yield surfaces with experimental data and, in turn, for a better understanding of materials during deformation and failure. The proposed loading system enables combined direct-shear stress pulses of duration exceeding one millisecond to be applied to the sample under consideration; hence, allowing for the achievement of a wider range of strain rates than what currently exists in the open literature. Force, torque, and velocity histories at the interface between bars and specimen are measured via a data analysis procedure based on the method of characteristics and on D’Alambert’s solution of wave equations. Additional velocity measurements are conducted by means of photon Doppler velocimetry. The capability of the apparatus is validated by means of bar-attached tests and will be further demonstrated via experiments on commercially available pure titanium. The rate-dependent behavior of the material subjected to complex stress states will be analyzed and reported. The failure surface of specimens subjected to a prescribed combination of tension and torsion will be assessed by means of optical profilometry and scanning electron microscope.

Original language	English
Title of host publication	Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics
Editors	Leslie Lamberson, Steven Mates, Veronica Eliasson
Place of Publication	Cham, Switzerland
Publisher	Springer, Cham
Pages	89-93
Number of pages	5
ISBN (Print)	9783030599461
DOIs	https://doi.org/10.1007/978-3-030-59947-8_16
Publication status	Published - 9 Apr 2021
Event	SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020 - Orlando, USA United States Duration: 14 Sept 2020 → 17 Sept 2020

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Conference

Conference	SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020
Country/Territory	USA United States
City	Orlando
Period	14/09/20 → 17/09/20

Funding

Acknowledgments The research is sponsored by EPSRC and Rolls-Royce plc as part of the Prosperity Partnership (Cornerstone) project. We are grateful to S.Carter, J.Fullerton, and P.Tantrum for their assistance with the apparatus manufacturing and assembly.

Keywords

Combined tensile-shear loading
Failure surface
Photon Doppler velocimetry
Split Hopkinson bar
Tension-torsion

ASJC Scopus subject areas

General Engineering
Computational Mechanics
Mechanical Engineering

Access to Document

10.1007/978-3-030-59947-8_16

Cite this

Xu, Y., Farbaniec, L., Siviour, C., Eakins, D., & Pellegrino, A. (2021). The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate. In L. Lamberson, S. Mates, & V. Eliasson (Eds.), Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics (pp. 89-93). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer, Cham. https://doi.org/10.1007/978-3-030-59947-8_16

The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate. / Xu, Yuan; Farbaniec, Lukasz; Siviour, Clive et al.
Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. ed. / Leslie Lamberson; Steven Mates; Veronica Eliasson. Cham, Switzerland: Springer, Cham, 2021. p. 89-93 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Xu, Y, Farbaniec, L, Siviour, C, Eakins, D & Pellegrino, A 2021, The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate. in L Lamberson, S Mates & V Eliasson (eds), Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, Springer, Cham, Cham, Switzerland, pp. 89-93, SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2020, Orlando, USA United States, 14/09/20. https://doi.org/10.1007/978-3-030-59947-8_16

Xu Y, Farbaniec L, Siviour C, Eakins D, Pellegrino A. The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate. In Lamberson L, Mates S, Eliasson V, editors, Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. Cham, Switzerland: Springer, Cham. 2021. p. 89-93. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-030-59947-8_16

Xu, Yuan ; Farbaniec, Lukasz ; Siviour, Clive et al. / The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate. Dynamic Behavior of Materials - Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics. editor / Leslie Lamberson ; Steven Mates ; Veronica Eliasson. Cham, Switzerland : Springer, Cham, 2021. pp. 89-93 (Conference Proceedings of the Society for Experimental Mechanics Series).

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The Development of Split Hopkinson Tension-Torsion Bar for the Understanding of Complex Stress States at High Rate

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