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Wave interaction with defects in pressurised composite structures

Apalowo, R.K.; Chronopoulos, Dimitrios; Tanner, Gregor

Authors

R.K. Apalowo

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GREGOR TANNER gregor.tanner@nottingham.ac.uk
Professor of Applied Mathematics



Abstract

There exists a great variety of structural failure modes which must be frequently inspected to ensure continuous structural integrity of composite structures. This work presents a Finite Element (FE) based method for calculating wave interaction with damage within structures of arbitrary layering and geometric complexity. The principal novelty is the investigation of pre-stress effect on wave propagation and scattering in layered structures. A Wave Finite Element (WFE) method, which combines FE analysis with periodic structure theory (PST), is used to predict the wave propagation properties along periodic waveguides of the structural system. This is then coupled to the full FE model of a coupling joint within which structural damage is modelled, in order to quantify wave interaction coeffcients through the joint. Pre-stress impact is quantified by comparison of results under pressurised and non-pressurised scenarios. The results show that including these pressurisation effects in calculations is essential. This is of specific relevance to aircraft structures being intensely pressurised while on air. Numerical case studies are exhibited for different forms of damage type. The exhibited results are validated against available analytical and experimental results.

Citation

Apalowo, R., Chronopoulos, D., & Tanner, G. (2018). Wave interaction with defects in pressurised composite structures. Journal of Nondestructive Evaluation, 37, https://doi.org/10.1007/s10921-018-0501-5

Journal Article Type Article
Acceptance Date Jun 13, 2018
Online Publication Date Jun 20, 2018
Publication Date Sep 30, 2018
Deposit Date Jun 19, 2018
Publicly Available Date Jun 20, 2018
Journal Journal of Nondestructive Evaluation
Print ISSN 0195-9298
Electronic ISSN 1573-4862
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 37
Article Number 48
DOI https://doi.org/10.1007/s10921-018-0501-5
Keywords Composite structures; Pressurisation; Wave finite element; Wave interaction with damage; Wave propagation
Public URL http://eprints.nottingham.ac.uk/id/eprint/52489
Publisher URL https://link.springer.com/article/10.1007%2Fs10921-018-0501-5
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Apalowo2018_Article_WaveInteractionWithDefectsInPr.pdf (1.8 Mb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0


Apalowo2018_Article_WaveInteractionWithDefectsInPr.pdf (2.1 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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