Constant strain rate compression of bovine cortical bone on the Split-Hopkinson Pressure Bar

Show simple item record Bekker, Annie Cloete, T.J. Chinsamy-Turan, A. Nurick, G.N. Kok, Schalk 2016-07-14T05:43:19Z 2016-07-14T05:43:19Z 2015-01
dc.description.abstract Cortical bone is a visco-elastic material which implies that strain rate will affect its response. Although the Split-Hopkinson Pressure Bar is an accepted technique for determining the dynamic compressive properties of cortical bone it has been shown that the strain rate of compression does not remain constant throughout the duration of a classical experiment with a uniform striker. This raises concerns as to the measurement of smeared responses. This paper presents a shaped striker technique whereby the incident pulse can be shaped to attain a constant strain rate experiment for bovine bone. Shaped strikers offer benefits such as reusability and increased test repeatability. A comparison of the stress–strain–strain rate responses attained through classical and constant strain rate experiments shows that the shape of the stress–strain curves from conventional experiments is adversely affected in the portion where the strain rate varies. The dynamic response corridors for the two tests are similar, however the ultimate properties are affected. It is concluded that the strain rate history should be presented with dynamic stress–strain responses since the instantaneous strain rate is a likely contributor to potential constitutive models. en_ZA
dc.description.department Mechanical and Aeronautical Engineering en_ZA
dc.description.librarian hb2016 en_ZA
dc.description.uri en_ZA
dc.identifier.citation Bekker, A, Cloete, TJ, Chinsamy-Turan, A, Nurick, GN & Kok, S 2015, 'Constant strain rate compression of bovine cortical bone on the Split-Hopkinson Pressure Bar', Materials Science and Engineering C, vol. 46, pp. 443-449. en_ZA
dc.identifier.issn 0928-4931
dc.identifier.other 10.1016/j.msec.2014.10.071
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2014 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Materials Science and Engineering : C. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering : C, vol. 46, pp. 443-449, 2015. doi : 10.1016/j.msec.2014.10.071. en_ZA
dc.subject Strain rate effects en_ZA
dc.subject Bovine cortical bone en_ZA
dc.subject Split-Hopkinson en_ZA
dc.subject Pressure bar en_ZA
dc.subject Shaped striker en_ZA
dc.subject Compression en_ZA
dc.title Constant strain rate compression of bovine cortical bone on the Split-Hopkinson Pressure Bar en_ZA
dc.type Postprint Article en_ZA

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