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  4. Crashworthiness of magnesium sheet structures
 
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Crashworthiness of magnesium sheet structures

Publikationstyp
Conference Paper
Date Issued
2013-07
Sprache
English
Author(s)
Steglich, Dirk  
Bohlen, Jan  
Tian, Xiaowei  
Riekehr, Stefan  
Kashaev, Nikolai  
Bargmann, Swantje  
Letzig, Dietmar  
Kainer, Karl-Ulrich  
Huber, Norbert  orcid-logo
Institut
Werkstoffphysik und -technologie M-22  
TORE-URI
http://hdl.handle.net/11420/3065
Journal
Materials science forum  
Volume
765
Start Page
590
End Page
594
Citation
Materials Science Forum 765: 590-594 (2013)
Contribution to Conference
Sixth International Light Metals Technology Conference (LMT2013)  
Publisher DOI
10.4028/www.scientific.net/MSF.765.590
Scopus ID
2-s2.0-84883033206
Publisher
Trans Tech Publications
A hollow rectangular profile, as an example of a typical structural component made of magnesium alloy sheets has been built, tested and evaluated in order to assess its behaviour during axial crushing. The profiles were joined from plane sheets of AZ31 and ZE10, respectively, by laser beam welding and were then tested in compression. Numerical simulations have been conducted to understand the complex interplay between hardening characteristics of the materials under investigation, profile cross-section variation and energy absorption. The results from the compression testing of the profiles show that the welds are not the source of damage initiation and failure. The performance of the magnesium profiles in terms of dissipated specific energy is confirmed for small and intermediate displacements to be comparable to that of aluminium profiles. For large displacements, however, the shear-type failure mode of magnesium causes a sharp drop of the crushing force and thus limits the energy absorption. These findings demonstrate the requirement for an alloy and wrought magnesium process development specifically for crash applications which aims at progressive hardening along with high ductility for improving the bending and shear behaviour.
Subjects
magnesium sheet alloys
finite element analysis
uniaxial compression
buckling
DDC Class
500: Naturwissenschaften
540: Chemie
600: Technik
620: Ingenieurwissenschaften
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