Buckling and strength analysis of panels with discrete stiffness tailoring

Journal article


Culliford, Lucie, Choudhry, Rizwan Saeed, Butler, Richard and Rhead, Andrew T. 2019. Buckling and strength analysis of panels with discrete stiffness tailoring. Composite Structures. 234, p. 111672. https://doi.org/10.1016/j.compstruct.2019.111672
AuthorsCulliford, Lucie, Choudhry, Rizwan Saeed, Butler, Richard and Rhead, Andrew T.
Abstract

Continuous variation of stiffness across flat plates has been shown, theoretically, to improve buckling performance by up to 60%. However, steered fibre manufacturing methods cannot achieve the minimum radius of curvature required for improvement whilst maintaining a high deposition rate. An alternative concept, Discrete Stiffness Tailoring (DST), which varies stiffness within a ply through discrete changes of angle, is compatible with high rate deposition methods such as Advanced Tape Laying. Through the simple example of redistribution of the material in a quasi-isotropic [±45/90/0]2S laminate whilst maintaining ply percentages, DST is shown both experimentally and theoretically to improve buckling stress by at least 15% with no indication of failure in regions of discrete angle change (seams). However, the reduced tensile strength of seams obtained by virtual and experimental testing means that increased buckling performance in the principle load direction needs to be balanced against loss of transverse strength

KeywordsCeramics and Composites; Material Design; Fibre reinforced Composites; Finite Element Analysis; Material and Mechanical Engineering
Year2019
JournalComposite Structures
Journal citation234, p. 111672
PublisherElsevier
ISSN0263-8223
Digital Object Identifier (DOI)https://doi.org/10.1016/j.compstruct.2019.111672
Web address (URL)http://hdl.handle.net/10545/624399
http://creativecommons.org/licenses/by-nc-nd/4.0/
hdl:10545/624399
Publication dates05 Nov 2019
Publication process dates
Deposited15 Jan 2020, 15:06
Accepted03 Nov 2019
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Attribution-NonCommercial-NoDerivatives 4.0 International

ContributorsUniversity of Bath and University of Derby
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