TY - JOUR
T1 - Non-destructive characterisation of out-of-plane fibre waviness in carbon fibre reinforced polymers by X-ray dark-field radiography
AU - Glinz, Jonathan
AU - Thor, Michael
AU - Schulz, Joachim
AU - Zabler, Simon
AU - Kastner, Johann
AU - Senck, Sascha
N1 - Funding Information:
This work was financed by the project “Phad-CT” funded by the federal government of Upper Austria [FFG grant number: 875432] and by the project “FatAM” in the course of COIN “Aufbau” [FFG grant number: 884101].
Publisher Copyright:
© 2022 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2022
Y1 - 2022
N2 - Fibre waviness is a frequently encountered problem in composite design and manufacturing as it can severely influence mechanical properties of components. In this work, we propose a new method for the detection and quantification of out-of-plane fibre waviness in carbon fibre composites using Talbot-Lau grating interferometry. The sensitivity of X-ray dark-field imaging to the orientation of carbon fibres is exploited to visualise fibre waviness by radiographic imaging and reduce measurement times in comparison to full computed tomography scans. We show that fibre waviness can be qualitatively detected by single radiographic images providing a valid option, for example, for in-line monitoring of similar specimens. Furthermore, quantitative evaluation of fibre waviness angles can be performed by repeated radiographic imaging over an angular range of roughly 10°. Therefore, the number of required projection images can be reduced significantly. With this method, we evaluated wave angles at an error of less than ±1.5° compared to results achieved by full computed tomography scans.
AB - Fibre waviness is a frequently encountered problem in composite design and manufacturing as it can severely influence mechanical properties of components. In this work, we propose a new method for the detection and quantification of out-of-plane fibre waviness in carbon fibre composites using Talbot-Lau grating interferometry. The sensitivity of X-ray dark-field imaging to the orientation of carbon fibres is exploited to visualise fibre waviness by radiographic imaging and reduce measurement times in comparison to full computed tomography scans. We show that fibre waviness can be qualitatively detected by single radiographic images providing a valid option, for example, for in-line monitoring of similar specimens. Furthermore, quantitative evaluation of fibre waviness angles can be performed by repeated radiographic imaging over an angular range of roughly 10°. Therefore, the number of required projection images can be reduced significantly. With this method, we evaluated wave angles at an error of less than ±1.5° compared to results achieved by full computed tomography scans.
KW - Out-of-plane fibre waviness
KW - Talbot-Lau grating interferometry
KW - dark-field radiography
KW - radiographic testing
UR - http://www.scopus.com/inward/record.url?scp=85129237371&partnerID=8YFLogxK
U2 - 10.1080/10589759.2022.2063860
DO - 10.1080/10589759.2022.2063860
M3 - Article
SN - 1058-9759
VL - 37
SP - 497
EP - 507
JO - Nondestructive Testing and Evaluation
JF - Nondestructive Testing and Evaluation
IS - 5
ER -