Corrugated all-composite sandwich structures. Part 2: Failure mechanisms and experimental programme
2009 (English)In: Composites Science And Technology, ISSN 0266-3538, Vol. 69, no 7-8, 920-925 p.Article in journal (Refereed) Published
A novel corrugated composite core, referred to as a hierarchical corrugation, has been developed and tested experimentally. Hierarchical corrugations exhibit a range of different failure modes depending on the geometrical properties and the material properties of the structures. In order to understand the different failure modes the analytical strength model, developed in part I of this paper, was used to make collapse mechanism maps for the different corrugation configurations. If designed correctly, the hierarchical structures can have more than 7 times higher weight specific strength compared to its monolithic counter part. The difference in strength arises mainly from the increase in buckling resistance of the sandwich core members compared to the monolithic version. The highest difference in strength is seen for core configurations with low overall density. As the density of the core increases, the monolithic core members get stockier and more resistant to buckling and thus the benefits of the hierarchical structure reduces.
Place, publisher, year, edition, pages
Elsevier, 2009. Vol. 69, no 7-8, 920-925 p.
Structural composites, Sandwich structures, Hierarchical structures, beams
Composite Science and Engineering
IdentifiersURN: urn:nbn:se:kth:diva-18452DOI: 10.1016/j.compscitech.2008.11.035ISI: 000266380700007ScopusID: 2-s2.0-64849106855OAI: oai:DiVA.org:kth-18452DiVA: diva2:336499
QC 201005252010-08-052010-08-052015-05-07Bibliographically approved