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Cohesive zone modelling of adhesive joints employing a unified and simplified testing program for material characterization

Brodbeck, Marcel und Sikora, Sebastian P. und Voggenreiter, Heinz (2017) Cohesive zone modelling of adhesive joints employing a unified and simplified testing program for material characterization. 4th International Conference on Structural Adhesive Bonding, 6.-7. Juli 2017, Porto, Portugal.

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Kurzfassung

In automotive engineering, it is state of the art to use high-strength, toughness-modified epoxy adhesives (EP) combined with spot-welding in the assembly of the metallic body-in-white. Modern multi-material structures contribute to changes in the requirements on advanced adhesive joining techniques. In recent applications a trend towards more flexible adhesives can be observed, particularly the usage of polyurethane adhesives (PU). Both types of adhesives (EP and PU) have to be modeled in structural simulations. Considering full-scale crash models, cohesive zone elements are suitable due to their high computation efficiency. A universal characterization approach for both types of adhesive joints based on cohesive zone modelling is introduced. In recent research work at DLR, one main challenge is to identify a common testing program for the characterization of EP- and PU-adhesives. First, a state of the art testing program using specific specimen geometries for epoxy adhesives as TDCB (for Mode-I) and TENF (for Mode-II) is investigated. As a second step, this experimental methodology is transferred to the group of polyurethane adhesives. For this purpose, the Mode-II specimen geometry has to be changed due to the high compliance of PU-adhesives. Therefor the pursued approach is to replace Mode-II by Mode-III. In further steps, the Mode-I and Mode-III specimen geometries can be simplified in a manner that the same adherends can be used for both crack modes and both adhesive groups. The experimental and numerical results of the suggested material characterization program are shown to verify the approaches of unification and simplification.

elib-URL des Eintrags:https://elib.dlr.de/117727/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Cohesive zone modelling of adhesive joints employing a unified and simplified testing program for material characterization
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Brodbeck, Marcelmarcel.brodbeck (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sikora, Sebastian P.sebastian.sikora (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Voggenreiter, HeinzHeinz.Voggenreiter (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:6 Juli 2017
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:cohesive Zone modelling, adhesive joints, epoxy, polyurethane, material characterization
Veranstaltungstitel:4th International Conference on Structural Adhesive Bonding
Veranstaltungsort:Porto, Portugal
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:6.-7. Juli 2017
Veranstalter :Faculty of Engineering, University of Porto
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr (alt)
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - NGC Fahrzeugstruktur (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Fahrzeugkonzepte
Institut für Bauweisen und Strukturtechnologie > Strukturelle Integrität
Hinterlegt von: Brodbeck, Marcel
Hinterlegt am:21 Dez 2017 11:28
Letzte Änderung:21 Dez 2017 11:28

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