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Compression strength of sandwich panels with sub-interface damage in the foam core
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
2009 (English)In: Composites Science And Technology, ISSN 0266-3538, Vol. 69, no 13, 2231-2240 p.Article in journal (Refereed) Published
Abstract [en]

This paper addresses the effect of a local quasi-static indentation or a low-velocity impact on the residual strength of foam core sandwich panels subjected to edgewise compression. The damage is characterized by a local zone of crushed core accompanied by a residual dent in the face sheet. Experimental studies show that such damage can significantly alter the compressive strength. Theoretical analysis of the face sheet local bending is performed for two typical damage modes (with or without a face-core debonding). The solutions allow estimation of the onset of (a) an unstable dent growth (local buckling) or (b) a compressive failure in the face sheet. The theoretical results are in agreement with the test data for two considered sandwich configurations.

Place, publisher, year, edition, pages
2009. Vol. 69, no 13, 2231-2240 p.
Keyword [en]
Sandwich, Local damage, Crushed foam, Residual dent, Local buckling, Damage tolerance
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-32544DOI: 10.1016/j.compscitech.2009.06.014ISI: 000269295900031ScopusID: 2-s2.0-67650957550OAI: diva2:411027
QC 20110415Available from: 2011-04-15 Created: 2011-04-15 Last updated: 2011-04-15Bibliographically approved

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Shipsha, Andrey
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