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Measurement of Epoxy Film Adhesive Properties in Torsion and Tension Using Tubular Butt Joints

Kosmann, Jens und Klapp, Oliver und Holzhüter, Dirk und Schollerer, Martin und Fiedler, Arne und Nagel, Christoph und Hühne, Christian (2017) Measurement of Epoxy Film Adhesive Properties in Torsion and Tension Using Tubular Butt Joints. AB2017 – 4th International Conference on Structural Adhesive Bonding, 06.-07. Juli 2017, Porto, Portugal.

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Kurzfassung

With the increasing amount of composite materials used for civil aircraft structures, joining and repair methods suitable for composite structures are necessary. Possible methods are structural bonding and bonded repairs. However, a huge challenge is the availability of reliable material properties for the adhesives. A common ap-proach for determining the material properties is to use adhesively bonded tubular butt joint specimens (e.g. ISO 11003-1). Within the Presented work they are manufactured with a new joining device and tested in a biaxial servo hydraulic testing system where tensional and torsional loads can be applied individually but also simultaneously. Thus, the multiaxiality of the bondline stress can be selectively adjusted and the adhesives yielding and strength can be determined. In order to determine stress-strain curves of the adhesive systems to be investigated a local strain or deformation measurements needs to be performed. However, the small thickness (approximately 0.1mm) of an e.g. epoxy film adhesive is a huge challenge. Because of the thin bondline, resulting deformations are very small. Therefore, the measuring method is crucial for a reliable adhesive characteri-zation. Within this paper, two different strain measurement techniques are presented and compared. The first is a high resolution digital image correlation (DIC) system. DIC measuring has the advantage of measuring a complete strain field in each direction within the measurement area. The second method relies on capacitive sensors, which are com-bined in a manner, which allows the decoupled measuring of axial and torsional move-ments of the adhesively bonded adherends. This method is easy to use, online applicable also to fatigue testing but gives only a global displacement information. Both methods and results are compared and discussed.

elib-URL des Eintrags:https://elib.dlr.de/113259/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Measurement of Epoxy Film Adhesive Properties in Torsion and Tension Using Tubular Butt Joints
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kosmann, Jensjens.kosmann (at) dlr.dehttps://orcid.org/0000-0002-2225-4832NICHT SPEZIFIZIERT
Klapp, OliverFraunhofer IFAMNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Holzhüter, Dirkdirk.holzhueter (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schollerer, Martinmartin.schollerer (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Fiedler, ArneFraunhofer IFAMNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Nagel, ChristophFraunhofer IFAMNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hühne, Christianchristian.huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223NICHT SPEZIFIZIERT
Datum:Juli 2017
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Scarf Bonded Repair; Joint, ARAMIS, DIC, Tubular Butt Joints Torsion Tension Test, Film Adhe-sive
Veranstaltungstitel:AB2017 – 4th International Conference on Structural Adhesive Bonding
Veranstaltungsort:Porto, Portugal
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:06.-07. Juli 2017
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation und Validierung (alt), L - Strukturen und Werkstoffe (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Funktionsleichtbau
Hinterlegt von: Kosmann, Jens
Hinterlegt am:18 Aug 2017 07:24
Letzte Änderung:10 Feb 2020 07:20

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