Journal
MATERIALS & DESIGN
Volume 60, Issue -, Pages 510-519Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2014.04.014
Keywords
Sandwich beam; Corrugated core; Three-point bending; Failure modes
Categories
Funding
- National Basic Research Program of China [2011CB610305]
- National Natural Science Foundation of China [11021202, 11072188, 11102152]
- National 111 Project of China [B06024]
- Shaanxi Province 13115 Project
- Fundamental Research Funds for Xi'an Jiaotong University [xjj2011007]
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Sandwich panels having metallic corrugated cores had distinctly different attributes from those having metal foam cores, the former with high specific stiffness/strength and the latter with superior specific energy absorption capacity. To explore the attribute diversity, all-metallic hybrid-cored sandwich constructions with aluminum foam blocks inserted into the interstices of steel corrugated plates were fabricated and tested under three-point bending. Analytical predictions of the bending stiffness, initial failure load, peak load, and failure modes were obtained and compared with those measured. Good agreement between analysis and experiment was achieved. Failure maps were also constructed to reveal the mechanisms of initial failure. Foam insertions altered not only the failure mode of the corrugated sandwich but also increased dramatically its bending resistance. All-metallic sandwich constructions with foam-filled corrugated cores hold great potential as novel lightweight structural materials for a wide range of structural and crushing/impulsive loading applications. (C) 2014 Elsevier Ltd. All rights reserved.
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