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Numerical study of the influence of the specimen geometry on split Hopkinson tensile test results

Patricia Verleysen UGent, Benedict Verhegghe UGent, Joris Degrieck UGent and BC De Cooman (2005) WIT TRANSACTIONS ON ENGINEERING SCIENCES. p.549-562
abstract
In recent years numerous studies on the high strain rate tensile properties of sheet materials using Split Hopkinson Tensile Bar (SHTB) experiments have been reported in literature. For SHTB experiments no consensus exists on the specimen geometry to be used and its influence on the observed behaviour. However, previous studies have revealed that changes in the specimen geometry give rise to distinct differences in established mechanical behaviour. In this contribution results are presented of finite element simulations of SHTB experiments using different specimen geometries. These simulations not only confirm previously obtained experimental results, but also give complimentary and detailed information on the true distribution of the stress and the strain in the specimen, including the non-axial stresses. Attention is paid to the basic assumptions of Hopkinson experiments: the uniaxiality of the stress state and the homogeneity of the strain. It is shown that the validity of these assumption is highly geometry dependent. The influence of the deviation from these assumptions on the material behaviour extracted from a Hopkinson experiment will be discussed.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
specimen geometry, split Hopkinson bar test, sheet materials
in
WIT TRANSACTIONS ON ENGINEERING SCIENCES
WIT Trans. Eng. Sci.
editor
M Alves and N Jones
issue title
Impact Loading of Lightweight Structures
pages
549 - 562
publisher
WIT Press
place of publication
Southampton, UK
conference name
International conference on Impact Loading of Lightweight Structures
conference location
Florianopolis, Brazil
conference start
2005-05-08
conference end
2005-08-12
Web of Science type
Article
Web of Science id
000230619900039
ISSN
1746-4471
ISBN
1-84564-159-0
language
English
UGent publication?
yes
classification
P1
id
405307
handle
http://hdl.handle.net/1854/LU-405307
date created
2008-05-14 16:22:00
date last changed
2010-03-04 14:57:25
@inproceedings{405307,
  abstract     = {In recent years numerous studies on the high strain rate tensile properties of sheet materials using Split Hopkinson Tensile Bar (SHTB) experiments have been reported in literature. For SHTB experiments no consensus exists on the specimen geometry to be used and its influence on the observed behaviour. However, previous studies have revealed that changes in the specimen geometry give rise to distinct differences in established mechanical behaviour. In this contribution results are presented of finite element simulations of SHTB experiments using different specimen geometries. These simulations not only confirm previously obtained experimental results, but also give complimentary and detailed information on the true distribution of the stress and the strain in the specimen, including the non-axial stresses. Attention is paid to the basic assumptions of Hopkinson experiments: the uniaxiality of the stress state and the homogeneity of the strain. It is shown that the validity of these assumption is highly geometry dependent. The influence of the deviation from these assumptions on the material behaviour extracted from a Hopkinson experiment will be discussed.},
  author       = {Verleysen, Patricia and Verhegghe, Benedict and Degrieck, Joris and De Cooman, BC},
  booktitle    = {WIT TRANSACTIONS ON ENGINEERING SCIENCES},
  editor       = {Alves, M and Jones, N},
  isbn         = {1-84564-159-0},
  issn         = {1746-4471},
  keyword      = {specimen geometry,split Hopkinson bar test,sheet materials},
  language     = {eng},
  location     = {Florianopolis, Brazil},
  pages        = {549--562},
  publisher    = {WIT Press},
  title        = {Numerical study of the influence of the specimen geometry on split Hopkinson tensile test results},
  year         = {2005},
}

Chicago
Verleysen, Patricia, Benedict Verhegghe, Joris Degrieck, and BC De Cooman. 2005. “Numerical Study of the Influence of the Specimen Geometry on Split Hopkinson Tensile Test Results.” In Wit Transactions on Engineering Sciences, ed. M Alves and N Jones, 549–562. Southampton, UK: WIT Press.
APA
Verleysen, P., Verhegghe, B., Degrieck, J., & De Cooman, B. (2005). Numerical study of the influence of the specimen geometry on split Hopkinson tensile test results. In M. Alves & N. Jones (Eds.), WIT TRANSACTIONS ON ENGINEERING SCIENCES (pp. 549–562). Presented at the International conference on Impact Loading of Lightweight Structures, Southampton, UK: WIT Press.
Vancouver
1.
Verleysen P, Verhegghe B, Degrieck J, De Cooman B. Numerical study of the influence of the specimen geometry on split Hopkinson tensile test results. In: Alves M, Jones N, editors. WIT TRANSACTIONS ON ENGINEERING SCIENCES. Southampton, UK: WIT Press; 2005. p. 549–62.
MLA
Verleysen, Patricia, Benedict Verhegghe, Joris Degrieck, et al. “Numerical Study of the Influence of the Specimen Geometry on Split Hopkinson Tensile Test Results.” Wit Transactions on Engineering Sciences. Ed. M Alves & N Jones. Southampton, UK: WIT Press, 2005. 549–562. Print.