Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-37020 Beitrag zu einem Tagungsband Maierhofer, Christiane; Krankenhagen, Rainer; Röllig, Mathias; Riemer, Stefanie; Gower, M.; Baker, G.; Lodeiro, M.; Knazovicka, L.; Blahut, A.; Monte, C.; Adibekyan, A. Gutschwager, B. Characterisation of artificial and natural defects in fibre reinforced plastics designed for energy applications using active thermography Amongst various other NDT methods, within the EMRP-project 'VITCEA' active thermography is validated for testing of CFRP and GFRP structures constructed for energy application. In this contribution, the optical and thermal properties of CFRP and GFRP reference defect artefact (RDA) and natural defects artefact (NDA) test specimens are characterized. Different excitation techniques and techniques for data analysis are compared for optimizing the number of detected defects. Berlin DGZfP DGZfP 2016 DGZfP-Proceeding BB 158 of 19th World Conference on Non-destructive Testing (WCNDT) BB 158 978-3-940283-78-8 19th World Conference on Non-destructive Testing (WCNDT) Munich, Germany 13.06.2016 17.06.2016 Paper we2i4, 1 9 urn:nbn:de:kobv:b43-370207 http://creativecommons.org/licenses/by-nd/3.0/de/ 2016-08-01 OPUS4-37512 Beitrag zu einem Tagungsband Maierhofer, Christiane; Krankenhagen, Rainer; Röllig, Mathias; Rehmer, Birgit; Gower, M.; Baker, G.; Lodeiro, M.; Aktas, A.; Knaszovicka, L.; Blahut, A.; Monte, C.; Adibekyan, A.; Gutschwager, B. Characterisation of artificial defects in CFRP and GFRP sheets designed for energy applications using active thermography The increased use of fibre-reinforced plastic (FRP) composites for improved efficiency and reliability in energy related applications e.g. wind and marine turbine blades, nacelles, oil and gas flexible risers, also increases the demand for innovative non-destructive testing technologies. Thus, in order to achieve increased acceptance of suited and optimized non-destructive testing (NDT) methods in industry, the European Metrology Research Programme (EMRP) project ENG57 Validated Inspection Techniques for Composites in Energy Applications (VITCEA) deals with the development and validation of innovative NDT technologies. In this contribution, results concerning thermographic investigations at test specimens during tensile loading and active thermography testing after tensile loading are presented. Additionally, the determination of the optical properties (relative transmittance and directional spectral emissivity) of CFRP and GFRP test specimens is described. Quebec, Canada QIRT Council 2016 Proceedings of Conference QIRT 2016 Conference QIRT 2016 Gdansk, Poland 04.07.2016 08.07.2016 Paper 076, 527 536 10.21611/qirt.2016.076 2016-09-28 OPUS4-44687 Zeitschriftenartikel Maierhofer, Christiane; Röllig, Mathias; Gower, M.; Lodeiro, M.; Baker, G.; Monte, C.; Adibekyan, A.; Gutschwager, B.; Knazowicka, L.; Blahut, A. Evaluation of different techniques of active thermography for quantification of artificial defects in fiber-reinforced composites using thermal and phase contrast data analysis For assuring the safety and reliability of components and constructions in energy applications made of fiber-reinforced polymers (e.g., blades of wind turbines and tidal power plants, engine chassis, flexible oil and gas pipelines) innovative non-destructive testing methods are required. Within the European Project VITCEA complementary methods (shearography, microwave, ultrasonics and thermography) have been further developed and validated. Together with partners from the industry, test specimens have been constructed and selected on-site containing different artificial and natural defect artefacts. As base materials, carbon and glass fibers in different orientations and layering embedded in different matrix materials (epoxy, polyamide) have been considered. In this contribution, the validation of flash and lock-in thermography to these testing problems is presented. Data analysis is based on thermal contrasts and phase evaluation techniques. Experimental data are compared to analytical and numerical models. Among others, the influence of two different types of artificial defects (flat bottom holes and delaminations) with varying diameters and depths and of two different materials (CFRP and GFRP) with unidirectional and quasi-isotropic fiber alignment is discussed. Springer 2018 International Journal of Thermophysics 39 5 Article 61, 1 37 10.1007/s10765-018-2378-z 2018-04-13