BENDING BEHAVIOR OF SIMPLY SUPPOTED METALLIC SANDWICH PLATES WITH DIMPLED CORES

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Metallic sandwich plates are lightweight structural materials with load-bearing and multi-functional characteristics. Previous analytic studies have shown that the bendability of these plates increases as the thickness decreases. Due to difficulty in the manufacture of thin sandwich plates, dimpled cores ( structures called egg-box cores) are employed as a sandwich core. High-precision dimpled cores are easily fabricated in a sectional forming process. The cores are then bonded with skin sheets by multi-point resistance welding. The bending characteristics of simply supported plates were observed by the defining measure, including the radius ratio of the small dimple, the thickness of a sandwich plate, and the pattern angle (0 degrees/90 degrees, 45 degrees). Experimental results revealed that sandwich plates with a thickness of 2.2 mm and a pattern angle of 0 degrees/90 degrees showed good bendability as the punch stroke under a collapse load was longer than other cases. In addition, the gap between attachment points was found to be an important parameter for the improvement of the bendability. Finally, sandwich plates with dimpled cores were bent with a radius of curvature of 330 mm for the sheet thickness of 2.2 mm using an incremental bending apparatus.
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Issue Date
2008
Language
English
Article Type
Article; Proceedings Paper
Keywords

STRUCTURAL PERFORMANCE; MECHANICAL-PROPERTIES; TRUSS CORES; PANELS; SHEET

Citation

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, v.22, pp.6179 - 6184

ISSN
0217-9792
URI
http://hdl.handle.net/10203/88211
Appears in Collection
ME-Journal Papers(저널논문)
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