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Surface Toughening – An industrial Approach to increase the Robustness of pure adhesive Joints with film adhesives

Schollerer, Martin and Kosmann, Jens and Holzhüter, Dirk and Bello-Larroche, Carlos and Hühne, Christian (2020) Surface Toughening – An industrial Approach to increase the Robustness of pure adhesive Joints with film adhesives. 1st International Conference on Industrial Applications of Adhesives 2020, 05.-06.03.2020, Madeira, Protugal. ISBN 978-989-9017-17-7

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Official URL: https://web.fe.up.pt/~iaa2020/

Abstract

Bonding is known for its wide range of advantages over bolted joints when joining different materials together. Nevertheless, disadvantages of a bonded joint can quickly occur if the bonded joint is subjected to higher loads. This problem is particularly well known in aviation. Highly loaded components are structurally bonded by a combination of rivets and adhesive in order to underline the advantages of structural adhesive bonding with the safety of the well-known bolted joints. Known as fail-safe design, this concept is damage tolerant and more robust against manufacturing defects through a secured double load path. Especially when joining fiber-reinforced composites, bolts weaken the adherends of the joint and only contribute to load transfer when the brittle adhesive fails [1]. With the help of Surface Toughening [2], a boltless technique for reducing stress concentrations and arresting cracks in adhesive bonded joints is available. This work describes the industrial application of this technique. Starting with coupon tests and a small scale demonstrator to ensure the compatibility with industrial manufacturing processes, such as infusion and prepreg manufacturing, a large scale demonstrator of a 2m CFRP HTP leading edge with hybrid laminar flow control is manufactured by the industrial partner AERnnova. Verifying a simple and cost-effective application of the technology, Surface Toughening enables robust bonded joints with a minimum impact on today's process of adhesive bonding. [1] E. Paroissien, et al., Int. J. Adhes. Adhes.,77,p.183-197,(2017). [2] M.J. Schollerer, et al., J. Adhes., 95:5-7, p.495-514, (2019).

Item URL in elib:https://elib.dlr.de/134367/
Document Type:Conference or Workshop Item (Speech)
Title:Surface Toughening – An industrial Approach to increase the Robustness of pure adhesive Joints with film adhesives
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schollerer, MartinMartin.Schollerer (at) dlr.dehttps://orcid.org/0000-0001-7015-9461
Kosmann, JensJens.Kosmann (at) dlr.dehttps://orcid.org/0000-0002-2225-4832
Holzhüter, Dirkdirk.holzhueter (at) dlr.dehttps://orcid.org/0000-0003-1001-2366
Bello-Larroche, CarlosUNSPECIFIEDUNSPECIFIED
Hühne, ChristianChristian.Huehne (at) dlr.dehttps://orcid.org/0000-0002-2218-1223
Date:5 March 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Book of Abstracts IAA2020
ISBN:978-989-9017-17-7
Status:Published
Keywords:adhesive bonding, Surface Toughening, stress reduction, crack arrest,joint strength increase
Event Title:1st International Conference on Industrial Applications of Adhesives 2020
Event Location:Madeira, Protugal
Event Type:international Conference
Event Dates:05.-06.03.2020
Organizer:L.F.M da Silva
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 - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Schollerer, Martin
Deposited On:16 Mar 2020 09:09
Last Modified:16 Mar 2020 09:09

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