Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques
There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, to implement the reliable fracture models and the efficient solution techniq...
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doaj-7d13d5913aed4f7c995aacbaba80b1e72021-05-02T01:30:14ZengKeAi Communications Co., Ltd.Defence Technology2214-91472014-06-0110216117610.1016/j.dt.2014.05.009Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniquesJohn F. Moxnes0Anne K. Prytz1Øyvind Frøyland2Siri Klokkehaug3Stian Skriudalen4Eva Friis5Jan A. Teland6Cato Dørum7Gard Ødegårdstuen8Land Systems Division, Norwegian Defence Research Establishment, P.O. Box 25, NO-2027 Kjeller, NorwayNammo Raufoss AS, P.O. Box 162, NO-2831 Raufoss, NorwayLand Systems Division, Norwegian Defence Research Establishment, P.O. Box 25, NO-2027 Kjeller, NorwayNammo Raufoss AS, P.O. Box 162, NO-2831 Raufoss, NorwayLand Systems Division, Norwegian Defence Research Establishment, P.O. Box 25, NO-2027 Kjeller, NorwayNammo Raufoss AS, P.O. Box 162, NO-2831 Raufoss, NorwayLand Systems Division, Norwegian Defence Research Establishment, P.O. Box 25, NO-2027 Kjeller, NorwayLand Systems Division, Norwegian Defence Research Establishment, P.O. Box 25, NO-2027 Kjeller, NorwayNammo Raufoss AS, P.O. Box 162, NO-2831 Raufoss, NorwayThere has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, to implement the reliable fracture models and the efficient solution techniques. The applicability of the Johnson–Cook strength and fracture model is evaluated by comparing the fracture behaviour of an expanding steel casing of a warhead with experiments. The numerical codes and different numerical solution techniques, such as Eulerian, Lagrangian, Smooth particle hydrodynamics (SPH), and the corpuscular models recently implemented in IMPETUS Afea are compared. For the same solution techniques and material models we find that the codes give similar results. The SPH technique and the corpuscular technique are superior to the Eulerian technique and the Lagrangian technique (with erosion) when it is applied to materials that have fluid like behaviour such as the explosive and the tracer. The Eulerian technique gives much larger calculation time and both the Lagrangian and Eulerian techniques seem to give less agreement with our measurements. To more correctly simulate the fracture behaviours of the expanding steel casing, we applied that ductility decreases with strain rate. The phenomena may be explained by the realization of adiabatic shear bands. An implemented node splitting algorithm in IMPETUS Afea seems very promising.http://www.sciencedirect.com/science/article/pii/S2214914714000415WarheadFragmentationSimulationFracture model |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
John F. Moxnes Anne K. Prytz Øyvind Frøyland Siri Klokkehaug Stian Skriudalen Eva Friis Jan A. Teland Cato Dørum Gard Ødegårdstuen |
spellingShingle |
John F. Moxnes Anne K. Prytz Øyvind Frøyland Siri Klokkehaug Stian Skriudalen Eva Friis Jan A. Teland Cato Dørum Gard Ødegårdstuen Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques Defence Technology Warhead Fragmentation Simulation Fracture model |
author_facet |
John F. Moxnes Anne K. Prytz Øyvind Frøyland Siri Klokkehaug Stian Skriudalen Eva Friis Jan A. Teland Cato Dørum Gard Ødegårdstuen |
author_sort |
John F. Moxnes |
title |
Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
title_short |
Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
title_full |
Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
title_fullStr |
Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
title_full_unstemmed |
Experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
title_sort |
experimental and numerical study of the fragmentation of expanding warhead casings by using different numerical codes and solution techniques |
publisher |
KeAi Communications Co., Ltd. |
series |
Defence Technology |
issn |
2214-9147 |
publishDate |
2014-06-01 |
description |
There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, to implement the reliable fracture models and the efficient solution techniques. The applicability of the Johnson–Cook strength and fracture model is evaluated by comparing the fracture behaviour of an expanding steel casing of a warhead with experiments. The numerical codes and different numerical solution techniques, such as Eulerian, Lagrangian, Smooth particle hydrodynamics (SPH), and the corpuscular models recently implemented in IMPETUS Afea are compared. For the same solution techniques and material models we find that the codes give similar results. The SPH technique and the corpuscular technique are superior to the Eulerian technique and the Lagrangian technique (with erosion) when it is applied to materials that have fluid like behaviour such as the explosive and the tracer. The Eulerian technique gives much larger calculation time and both the Lagrangian and Eulerian techniques seem to give less agreement with our measurements. To more correctly simulate the fracture behaviours of the expanding steel casing, we applied that ductility decreases with strain rate. The phenomena may be explained by the realization of adiabatic shear bands. An implemented node splitting algorithm in IMPETUS Afea seems very promising. |
topic |
Warhead Fragmentation Simulation Fracture model |
url |
http://www.sciencedirect.com/science/article/pii/S2214914714000415 |
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