ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Various polygonal tubes were compressed in the axial direction under quasi-static anddynamic loading conditions. The effect of the polygonal shape and the wall thickness on the crushbehavior is investigated, in which the cyclic buckling takes place. The numbers of polygonal edgeswere 3, 4, 5, 6 and 7 in the experiment. A circular tube was also tested for comparison. The tubeswere machined from aluminum alloy A5056 bar. Crush strength is estimated as an index of theenergy absorption capacity of the tube. It increases with increasing the number of polygonal edgesof the tube, although it almost saturates when the number of polygonal edges is more than 6. For thewider variety of polygonal tubes than that in the experiment, numerical simulation is performedusing the dynamic explicit finite element code DYNA3D. The computed crush behavior well agreeswith the corresponding experimental one, however, the difference in collapse mode arises due to theslight imperfections in experiment. The deformation pattern becomes more irregular for thethinner-walled tube. Further, it is presumed that the large hardening exponent in the plastic propertyof the material could prevent the buckling switching from the symmetric mode to asymmetric onein the crushing of circular tube
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.1399.pdf
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