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Bending Crash Behaviour of Foam-Filled Rectangular Magnesium Alloy AZ31 B Tubes

Zhou, Ping and Beeh, Elmar and Friedrich, Horst E. and Kriescher, Michael and Straßburger, Philipp and Holzapfel, Martin and Kraft, Harald and Rieger, Cedric (2015) Bending Crash Behaviour of Foam-Filled Rectangular Magnesium Alloy AZ31 B Tubes. Material Science Forum, 828. Trans Tech Publications. ISSN 1662-9752.

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Official URL: http://www.scientific.net/MSF.828-829.259


Quasi-static/dynamic three-point bending tests were conducted to assess the crash performance of magnesium alloy AZ31B extruded and sheet tubes at the German Aerospace Centre (DLR) – Institute of Vehicle Concepts in Stuttgart. Different foam-filled AZ31B beams with a variation of foam density and thickness were fabricated through several manufacturing processes: cold bending, tungsten inert gas welding, cathodic dip painting and polyurethane foam injection. The experimental results were compared with those from mild steel DC04 tubes. It shows that empty magnesium alloy AZ31B outperforms steel DC04 in terms of specific energy absorption for the empty tubes with equivalent volume when subjected to bending loads. It was found that the foam-filled tubes achieved much higher load carrying capacity and specific energy absorption than the empty tubes. Moreover, there is a tendency showing that a foam-filled beam with a higher foam density reaches higher load carrying capacity, but fractures earlier. The foam-filled AZ31B tube with 0.20 g/cm3 foam obtained the highest specific energy absorption, but this outperformance was weakened due to the earlier fracture. In addition, the numerical simulation utilising material model MAT_124 in LS-DYNA explicit FEA package was performed. The simulation results indicate that using calibrated stress-strain curves and failure parameters, material model MAT_124 yields a general good agreement with the experimental results.

Item URL in elib:https://elib.dlr.de/101883/
Document Type:Editorship of Proceedings
Title:Bending Crash Behaviour of Foam-Filled Rectangular Magnesium Alloy AZ31 B Tubes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zhou, Pingping.zhou (at) dlr.deUNSPECIFIED
Beeh, Elmarelmar.beeh (at) dlr.deUNSPECIFIED
Friedrich, Horst E.horst.friedrich (at) dlr.deUNSPECIFIED
Kriescher, Michaelmichael.kriescher (at) dlr.deUNSPECIFIED
Straßburger, Philippphilipp.strassburger (at) dlr.deUNSPECIFIED
Holzapfel, Martinmartin.holzapfel (at) dlr.deUNSPECIFIED
Kraft, Haraldharald.kraft (at) dlr.deUNSPECIFIED
Rieger, Cedriccedric.rieger (at) dlr.deUNSPECIFIED
Date:26 August 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 259-264
Publisher:Trans Tech Publications
Series Name:Material Science Forum
Keywords:Magnesium alloy AZ31B, Foam-filled tube, Crashworthiness, Three-point bending, Finite element analysis
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts
Deposited By: Beeh, Elmar
Deposited On:25 Jan 2016 16:53
Last Modified:10 May 2016 23:41

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