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Analysis of Environmental and Operational Condition Effects on Guided Ultrasonic Waves in Stiffened CFRP Structures

Eckstein, Benjamin and Moix-Bonet, Maria and Bach, Martin (2014) Analysis of Environmental and Operational Condition Effects on Guided Ultrasonic Waves in Stiffened CFRP Structures. In: ndt.net. 7th European Workshop on Structural Health Monitoring, July 8-11, 2014, La Cité, Nantes, France.

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Abstract

Structural Health Monitoring by Guided Ultrasonic Waves for real world applications relies on compensation of operational and environmental effects. The effects to be taken into account are depending not only on the present factors for a particular application scenario, but as well on the structure to be monitored itself. Especially for stiffened CFRP structures, wave propagation and subsequent temperature effects are of increasing complex nature. The load and temperature condition of aerospace components typically vary along the flight cycle of an aircraft and is subject of a vast number of operational and environmental factors. The extensive research on temperature influence on wave propagation and transduction as the most important influence factor in the last years has broad up two widely spread methods for temperature compensation: Optimum Baseline Selection and Baseline Signal Stretch, which can be applied in a combination as well. In this work the existing compensation concept are challenged regarding its applicability to real world structures and environmental and operational conditions. For that purpose experimental data from two structures are analysed. Firstly, the influence of on wave propagation is analysed in the scope of a lab test by data from a stiffened CFRP panel subject to temperature variation. Secondly, the influence of environmental and operational conditions in the frame of a flight test is analysed.

Item URL in elib:https://elib.dlr.de/103381/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of Environmental and Operational Condition Effects on Guided Ultrasonic Waves in Stiffened CFRP Structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eckstein, BenjaminAirbus Group InnovationsUNSPECIFIED
Moix-Bonet, MariaDLR-FAUNSPECIFIED
Bach, MartinAirbus Group InnovationsUNSPECIFIED
Date:July 2014
Journal or Publication Title:ndt.net
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Guided waves, Aerospace SHM applications
Event Title:7th European Workshop on Structural Health Monitoring
Event Location:La Cité, Nantes, France
Event Type:international Conference, Workshop
Event Dates:July 8-11, 2014
Organizer:EWSHM 2014 local organizing committee
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: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Moix-Bonet, Maria
Deposited On:13 Jun 2016 08:09
Last Modified:13 Jun 2016 08:09

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