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Joining-technique selection for complex multi-material structures focusing on the mechanical behaviour of adhesive joints

Sikora, Sebastian P. and Brodbeck, Marcel and Behling, Tobias (2018) Joining-technique selection for complex multi-material structures focusing on the mechanical behaviour of adhesive joints. In: Book of Abstracts of EURADH 2018, pp. 305-306. Publindústria, Produção de Comunicação, Lda.. 12th European Adhesion Conference and 4th Luso-Brazilian Conference on Adhesion and Adhesives (EURADH/CLBA 2018), 5.-7. Sep. 2018, Lissabon, Portugal. ISBN 978-989-8927-24-8

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Abstract

The trend to use multi-material structures in automotive lightweight design leads to an increasing diversity of joining techniques being applied. In structural components, these often can be combined in a large number of possible joining-technique configurations. This poses a challenge for engineers to choose the optimal configuration. The vision is to automate and facilitate the selection of a mechanically optimal joining-technique configuration in a software environment. Since adhesive solutions are crucial to multi-material designs, the initial focus of the current studies is on epoxy and polyurethane adhesive bonds. As a basis, a universal application-oriented characterization approach for adhesive bonds, developed at DLR, is used. Aiming at full-scale crash models, this approach incorporates cohesive-zone elements due to their high computation efficiency. To optimize the joining configuration, validation starts at the single configuration, proceeding to the optimization process. The cohesive-zone simulation method is applied to develop a validation specimen that exhibits non-trivial deformation during testing. Compared to structural applications, for research purposes, this multiple-joint specimen reduces complexity in the optimization process. It comprises three joints into one sample; for each joint two different adhesives can be chosen. The specimen is shown in the figure. In a tensile test, each joint is dominated by a different stress state - normal, shear and peeling. In that way a complex load case is achieved, for which the first-failing joint and the optimal joining-technique configuration is determined in simulation and validated by experiments.

Item URL in elib:https://elib.dlr.de/122334/
Document Type:Conference or Workshop Item (Speech)
Title:Joining-technique selection for complex multi-material structures focusing on the mechanical behaviour of adhesive joints
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sikora, Sebastian P.sebastian.sikora (at) dlr.deUNSPECIFIED
Brodbeck, Marcelmarcel.brodbeck (at) dlr.deUNSPECIFIED
Behling, Tobiastobias.behling (at) dlr.deUNSPECIFIED
Date:September 2018
Journal or Publication Title:Book of Abstracts of EURADH 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 305-306
Editors:
EditorsEmail
da Silva, Lucas F. M. da SilvaUniversity of Porto
Publisher:Publindústria, Produção de Comunicação, Lda.
ISBN:978-989-8927-24-8
Status:Published
Keywords:joining-technique configuration, structural simulation, multiple-joint specimen, adhesive bond, epoxy, polyurethane
Event Title:12th European Adhesion Conference and 4th Luso-Brazilian Conference on Adhesion and Adhesives (EURADH/CLBA 2018)
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Dates:5.-7. Sep. 2018
Organizer:Lucas F. M. da Silva, University of Porto
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Material and Process Applications for Road and Rail Vehicles
Institute of Structures and Design > Structural Integrity
Deposited By: Sikora, Sebastian
Deposited On:15 Nov 2018 10:13
Last Modified:15 Nov 2018 10:13

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