Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/196888

Title

Bending behaviors of metallic sandwich plates with a sheared dimple core under simply supported loading

Author(s)

Seong, D. Y.;  Jung, C. G.;  Yang, D. Y.;  Nam, G. H.;  Ahn, D. G.

Abstract

In this study, the bending responses of metallic sandwich plates with a sheared dimple core were investigated through the 3-point bending tests and dynamic plane bending tests. It was experimentally shown from the uniaxial tensile tests that the yield and tensile strengths of the brazed face sheet were weaker than those of the welded face sheet. A mild steel sheared dimple core was fabricated by the sectional forming process and then bonded with DP590 face sheets by multi-point resistance welding. Analysis for large deformation of a sandwich plate subject to 3-point bending was carried out, where frictional work was considered and a face sheet was treated as a rigid-plastic material based on Hollomon's flow rule. Load--deflection curves and the deformed shapes of the finite element method computations and the experiments were efficiently predicted by the proposed analysis. The effect of frictional work on the peak load and energy absorption increases as the bending angle increases. The dynamic bending responses of the sandwich plates, such as the effect of a deformed shape, failure mode, energy absorption and absorption ratio were compared with those of a high-strength steel sheet. It was demonstrated that a bendable sandwich plate was stronger construction than a high-strength steel sheet under the tested conditions, despite the weight reduction and weaker properties.

Publication type

Journal article

Source

Journal of Sandwich Structures and Materials, Vol. 13, no. 4 (Jul 2011), pp. 445-466

Publication year

2011

FOR Code(s)

0905 Civil Engineering;  0912 Materials Engineering

Keyword(s)

3-point bending;  Analysis for large deformation;  Dynamic plane bending;  Sheared dimple core;  Welded sandwich plate

Publisher

Sage

ISSN

1099-6362

Publisher URL

http://dx.doi.org/10.1177/1099636211400131

Copyright

Copyright © 2011 The Author(s).

Peer reviewed