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Damage detection and localisation of CMCs by means of electrical health monitoring

Stäbler, Tina and Böhrk, Hannah and Voggenreiter, Heinz (2020) Damage detection and localisation of CMCs by means of electrical health monitoring. CEAS Aeronautical Journal, 11 (4), pp. 929-935. Springer. doi: 10.1007/s13272-020-00460-z. ISSN 1869-5590.

Full text not available from this repository.

Official URL: https://link.springer.com/article/10.1007/s13272-020-00460-z

Abstract

Carbon-based composites such as C/C-SiC are used in thermal protection systems for atmospheric re-entry. The electrical properties of this semiconductor material can be used for health monitoring, as electrical resistivity changes with damage, strain, and temperature. In this work, electrical resistance measurements are used to detect damage in a thermal protection system made of C/C-SiC. This can be done in-situ. Damage experiments with 320mm×120mm×3 mm panel shaped samples were conducted with a multiplexer switching unit to determine up to 288 electrical resistance and voltage measurements per cycle time and spatially resolved. The change in resistance is an indicator for damage, and with the use of post-processing algorithms, the location of the damage can be determined. With these data, inhomogeneous temperatures can be accorded for and damage can be detected. This method reacts even to small damages where less than 0.02% of the monitored surface is damaged. A localisation with a deviation from the real defect of less than 8% in sample width and 17% in sample length is presented.

Item URL in elib:https://elib.dlr.de/139551/
Document Type:Article
Title:Damage detection and localisation of CMCs by means of electrical health monitoring
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stäbler, TinaTina.Staebler (at) dlr.dehttps://orcid.org/0000-0002-3645-1423
Böhrk, HannahHannah.Boehrk (at) dlr.dehttps://orcid.org/0000-0002-5261-4878
Voggenreiter, HeinzHeinz.Voggenreiter (at) dlr.deUNSPECIFIED
Date:4 August 2020
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:11
DOI :10.1007/s13272-020-00460-z
Page Range:pp. 929-935
Publisher:Springer
Series Name:CEAS Aeronautical Journal
ISSN:1869-5590
Status:Published
Keywords:Health monitoring; CMC; Electrical resistance measurement; Zustandsüberwachung
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project ReFEx - Reusability Flight Experiment
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space System Integration
Deposited By: Stäbler, Tina
Deposited On:18 Dec 2020 10:16
Last Modified:18 Dec 2020 10:16

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