Strength Tests of a CFRP Spar Using Methods of Acoustic Emission and Tensometry

Results of the strength tests of an aircraft wing spar made of Toray T1000 carbon fiber-reinforced plastic are presented. Construction failure zones have been inspected by the methods of acoustic emission (AE) and tensometry. Loading-induced changes in the stress-strain state (SSS) of wing-spar mate...

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Bibliographic Details
Published in:Russian journal of nondestructive testing 2018-04, Vol.54 (4), p.243-248
Main Authors: Stepanova, L. N., Petrova, E. S., Chernova, V. V.
Format: Article
Language:English
Subjects:
Acoustic emission testing
Acoustic Methods
Aircraft components
Aircraft construction materials
Carbon fiber reinforced plastics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crack propagation
Data processing
Emission analysis
Materials Science
Structural Materials
Wavelet transforms
Wing spars
Wings (aircraft)
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Summary:Results of the strength tests of an aircraft wing spar made of Toray T1000 carbon fiber-reinforced plastic are presented. Construction failure zones have been inspected by the methods of acoustic emission (AE) and tensometry. Loading-induced changes in the stress-strain state (SSS) of wing-spar material have been analyzed. The coordinates of AE signal sources that correspond to the separation of the upper spar cap from the spar web have been determined. Algorithms for AE-data processing using wavelet transforms are considered. Connections have been established between changes in stresses emerging in CFRP material, AE signal structure, and the occurrence and propagation of spar fracture.
ISSN:1061-8309
1608-3385
DOI:10.1134/S1061830918040101