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Strength Prediction of Adhesively Bonded Single Lap Joints with the eXtended Finite Element Method

Völkerink, Oliver and Kosmann, Jens and Schollerer, Martin and Holzhüter, Dirk and Hühne, Christian (2018) Strength Prediction of Adhesively Bonded Single Lap Joints with the eXtended Finite Element Method. Publindústria, Produção de Comunicação, Lda.. 12th European Adhesion Conference and 4th Luso-Brazilian conference on Adhesion and Adhesives, 05. - 07. Sept. 2018, Lissabon, Portugal. ISBN 978-989-8927-24-8

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Abstract

Because of the planar load introduction, its high strength over weight ratio, the avoidance of holes, corrosion resistance and component reduction, adhesively bonded joints attract increasing attention in the field of lightweight construction. Nonetheless, a reliable prediction of the joints’ behaviour in terms of stress and strength is still a tremendous challenge. In this study the eXtended Finite Element Method (XFEM) in combination with cohesive behaviour is used to model crack growth under quasi-static loading. The objective of this work is to study the influence of different continuum mechanical material models for the adhesive like the von Mises, linear and exponent Drucker-Prager model on XFEM strength predictions. It will be evaluated whether the strength prediction of joints mainly loaded in shear is more accurate with a high sophisticated material model. Therefore, strength predictions of Single Lap Joints (SLJ) with thick aluminium adherends according to ASTM D 5656 are performed. With the help of this example, the chosen continuum mechanics material models for the film adhesive are compared. The material parameters for the adhesive are derived from a number of specimen types with different load combinations. Herein, digital image correlation (DIC) data recorded during experimental tests are used to assess the material models in combination with the derived material parameters. Furthermore, with the experimental results the performed strength predictions are evaluated. In addition, a mesh convergence study for the adhesive bondline with regard to the predicted strength is carried out. It could be revealed that XFEM in combination with a suitable yield criterion and appropriate material parameters is a valid technique for the strength prediction of lap shear joints since the variance to the experiments is less than 1 %.

Item URL in elib:https://elib.dlr.de/121643/
Document Type:Conference or Workshop Item (Speech)
Title:Strength Prediction of Adhesively Bonded Single Lap Joints with the eXtended Finite Element Method
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Völkerink, Oliveroliver.voelkerink (at) dlr.dehttps://orcid.org/0000-0002-9589-1963
Kosmann, JensJens.Kosmann (at) dlr.dehttps://orcid.org/0000-0002-2225-4832
Schollerer, MartinMartin.Schollerer (at) dlr.dehttps://orcid.org/0000-0001-7015-9461
Holzhüter, Dirkdirk.holzhueter (at) dlr.dehttps://orcid.org/0000-0003-1001-2366
Hühne, ChristianChristian.Huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223
Date:5 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 86
Editors:
EditorsEmail
da Silva, Lucas F. M.lucas@fe.up.pt
Publisher:Publindústria, Produção de Comunicação, Lda.
ISBN:978-989-8927-24-8
Status:Published
Keywords:XFEM, DIC, adhesive bonding, SLJ, single lap joint, strength prediction, FEM, Drucker-Prager, film adhesive, EA9695
Event Title:12th European Adhesion Conference and 4th Luso-Brazilian conference on Adhesion and Adhesives
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Dates:05. - 07. Sept. 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation, L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Völkerink, Oliver
Deposited On:13 Dec 2018 06:08
Last Modified:13 Dec 2018 06:08

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