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Analytical and Spectral methods for Lamb wave simulations

Vivar Perez, Juan Miguel (2013) Analytical and Spectral methods for Lamb wave simulations. In: Structural Health Monitoring 2013. A roadmap to intelligent structures, pp. 1129-1136. DEStech Publications, Inc.. 9th International Workshop on Structural Health Monitoring, 10.-12. Sept. 2013, Stanford University, Stanford, California, USA. ISBN 978-1-60595-115-7.

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In applications where Lamb waves based damage detection methods are considered, conventional linear and quadratic finite elements commonly used to model elastic waves are inefficient. The required mesh to obtain relative accurate results derives in enormous computational cost when simulating the wave propagation behavior in time domain. Analytical methods offer fast and accurate results, but their application are limited to relatively simple geometries. To solve this problematic a hybrid analytic- spectral-element approach is developed here. Drawbacks of both formulations can be circumvented if we model the regions belonging to the plate geometry with analytical methods while the perturbations of the plate-like geometry are modeled using high-order (spectral) elements. This paper presents an efficient method to do the coupling. Using this hybrid formulation the numerical effort is reduced drastically. The functionality of the proposed scheme is shown studying the propagation of ultrasonic guided waves excited and received with piezoelectric transducers.

Item URL in elib:https://elib.dlr.de/84469/
Document Type:Conference or Workshop Item (Speech)
Title:Analytical and Spectral methods for Lamb wave simulations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vivar Perez, Juan Migueljuan.vivarperez (at) dlr.deUNSPECIFIED
Date:10 September 2013
Journal or Publication Title:Structural Health Monitoring 2013. A roadmap to intelligent structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1129-1136
EditorsEmailEditor's ORCID iD
Fu-Kuo, ChangDepartment of Aeronautics and Astronautics, Standford UniversityUNSPECIFIED
Publisher:DEStech Publications, Inc.
Keywords:Lamb waves, Analitical Methods, Structural Health Monitoring, Spectral Analysis
Event Title:9th International Workshop on Structural Health Monitoring
Event Location:Stanford University, Stanford, California, USA
Event Type:international Conference
Event Dates:10.-12. Sept. 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Vivar Perez, Dr. -Ing. Juan Miguel
Deposited On:11 Nov 2013 16:33
Last Modified:08 May 2014 23:29

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