Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5522
Title: Crushing and energy absorption characteristics of combined geometry shells at quasi-static and dynamic strain rates: Experimental and numerical study
Authors: Taşdemirci, Alper
Şahin, Selim
Kara, Ali
Turan, Ali Kıvanç
Keywords: Combined geometry shells
Crushing behavior
Energy absorption
Finite element method
Micro inertia
Publisher: Elsevier Ltd.
Source: Taşdemirci, A., Şahin, S., Kara, A., and Turan, K. (2015). Crushing and energy absorption characteristics of combined geometry shells at quasi-static and dynamic strain rates: Experimental and numerical study. Thin-Walled Structures, 86, 83-93. doi:10.1016/j.tws.2014.09.020
Abstract: The quasi-static and dynamic crushing response and the energy absorption characteristics of combined geometry shells composed of a hemispherical cap and a cylindrical segment were investigated both experimentally and numerically. The inelastic deformation of the shells initiated with the inversion of the hemisphere cap and followed by the axisymmetric or diamond folding of the cylindrical segment depending on the loading rate and dimensions. The fracture of the thinner specimens in dynamic tests was ascribed to the rise of the flow stress to the fracture stress with increasing strain rate. The hemisphere cap absorbed more energy at dynamic rates than at quasi-static rates, while it exhibited lower strain rate and inertia sensitivities than the cylinder segment. For both the hemisphere cap and the cylinder segment, the inertial effect was shown to be more pronounced than strain rate effect at increasing impact velocities. © 2014 Elsevier Ltd.
URI: http://doi.org/10.1016/j.tws.2014.09.020
http://hdl.handle.net/11147/5522
ISSN: 0263-8231
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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