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Classification of solutions for guided waves in anisotropic composites with large numbers of layers

Huber, Armin and Sause, Markus (2018) Classification of solutions for guided waves in anisotropic composites with large numbers of layers. Journal of the Acoustical Society of America, 144 (6), pp. 3236-3251. Acoustical Society of America. DOI: 10.1121/1.5082299 ISSN 0001-4966

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Official URL: https://doi.org/10.1121/1.5082299

Abstract

Guided waves are used for the non-destructive evaluation in automotive and aerospace industries. There is a trend leaning away from isotropic materials to the manufacturing based on composites. However, the elastic wave dynamics in such materials is considerably more complicated. Much effort has been committed to the calculation of guided waves dispersion curves in composites. Lots of methods and tools are available, but it becomes difficult when there are more than one hundred layers. In this paper the calculation of dispersion diagrams and mode shapes using the stiffness matrix method is demonstrated. Boundary conditions are implemented into the stiffness matrix method that allow for the separate tracing of the various mode families. Shear horizontal modes are modeled with the transfer matrix method without facing any numerical instability. It is elucidated just how the occurrence of the mode families depends on the systems symmetry and wave propagation direction. As a result, the robustness and reliability of guided wave modeling by using the stiffness method is improved, and more information about the modes is yielded. This is demonstrated on exemplary layups of the fiber reinforced polymer T800/913, with up to 400 layers. Referencing is made against results from DISPERSE (Imperial College London, London, UK) for selected cases.

Item URL in elib:https://elib.dlr.de/124912/
Document Type:Article
Title:Classification of solutions for guided waves in anisotropic composites with large numbers of layers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Huber, ArminArmin.Huber (at) dlr.deUNSPECIFIED
Sause, MarkusUniversität AugsburgUNSPECIFIED
Date:11 December 2018
Journal or Publication Title:Journal of the Acoustical Society of America
Refereed publication:Yes
Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:144
DOI :10.1121/1.5082299
Page Range:pp. 3236-3251
Publisher:Acoustical Society of America
ISSN:0001-4966
Status:Published
Keywords:Lamb waves, shear horizontal waves, numerical computation, Dispersion diagrams, stiffness matrix method, mode shape, anisotropic composites, large number of layers
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Augsburg
Institutes and Institutions:Institute of Structures and Design > Automation and Production Technology
Deposited By: Huber, Armin
Deposited On:18 Dec 2018 09:44
Last Modified:30 May 2019 22:06

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