Stiffness and strength degradation of damaged truss core composites

Siska, Filip, Tawfeeq, Arwa F., Dlouhy, Ivo and Barnett, Matthew R. 2015, Stiffness and strength degradation of damaged truss core composites, Composite structures, vol. 125, pp. 287-294, doi: 10.1016/j.compstruct.2015.02.019.

Attached Files
Name Description MIMEType Size Downloads

Title Stiffness and strength degradation of damaged truss core composites
Author(s) Siska, Filip
Tawfeeq, Arwa F.
Dlouhy, Ivo
Barnett, Matthew R.ORCID iD for Barnett, Matthew R.
Journal name Composite structures
Volume number 125
Start page 287
End page 294
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0263-8223
Keyword(s) Finite element
High temperature tests
Strain rate
Truss core composites
Science & Technology
Materials Science, Composites
Materials Science
Summary Truss core laminates display stiffness and strength/density ratios superior to those seen in foam cored laminates. However, this superiority is held only for ideal shaped struts. If the truss core is damaged, its performance rapidly decreases towards that of a foam. The present study investigates the stiffness and strength degradation with imposed core deformation/damage. This is done for a pyramidal core structure made by electro-discharge machining from AA5083 alloy. The experiments are compared with finite element predictions. The effect of the strain rate sensitivity is studied by performing the tests at different temperatures and by FE simulations with different material data sets. The results show reasonable agreement between experiments and modeling. The stiffness of a damaged truss core rapidly degrades and reaches the performance levels seen in foams after ≈8% of deformation. The results show that a high strain rate sensitivity significantly influences post-buckling core behavior and is able to decrease the stiffness and strength degradation rate.
Language eng
DOI 10.1016/j.compstruct.2015.02.019
Field of Research 091202 Composite and Hybrid Materials
091207 Metals and Alloy Materials
Socio Economic Objective 861206 Structural Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL

Document type: Journal Article
Collections: Institute for Frontier Materials
GTP Research
Connect to link resolver
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 2 times in TR Web of Science
Scopus Citation Count Cited 3 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 527 Abstract Views, 2 File Downloads  -  Detailed Statistics
Created: Fri, 28 Aug 2015, 13:09:24 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact