Body panel performance properties such as denting force, oil canning/critical buckling load, initial and secondary stiffnesses under dynamic loading (drop weight test) were measured for different strength steels and two aluminum alloys using both flat and curved sheets. It was found that all these properties varied with the drop velocity. For the steels, the denting force steadily increased with the increase in drop velocity. For the aluminum alloys, the denting force increased with the drop velocity at lower velocities and decreased or remained unchanged at higher velocities. The oil canning/critical buckling load increased with the increase in drop velocity and initial and secondary stiffnesses decreased with the increase in drop velocity for both steel and aluminum. The dent resistance performance for some aluminum alloys with thicker gauge is comparable to steels dent tested at lower velocities. At higher velocities, however, the dent resistance performance of the steels was significantly better than the aluminum alloys, although the aluminum alloys were thicker. At any given velocity, the aluminum alloys had significantly lower oil canning/critical buckling load and initial/secondary stiffness values than the steels. This study also showed that the initial stiffness and the oil canning/critical load were independent of boundary conditions while the secondary stiffness and the denting force depended on the type of boundary condition used.
Dynamic dent resistance performance of steels and aluminum
Das dynamische Leistungsvermögen gegen Einbeulen von Stahl und Aluminium
SAE Technical Papers ; 1-13
1993
13 Seiten, 12 Bilder, 5 Tabellen, 12 Quellen
Conference paper
English
Dynamic Dent Resistance Performance of Steels and Aluminum
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