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A hybrid bondline concept for bonded composite joints

Löbel, Thomas and Holzhüter, Dirk and Sinapius, Michael and Hühne, Christian (2016) A hybrid bondline concept for bonded composite joints. International Journal of Adhesion and Adhesives (68), pp. 229-238. Elsevier. doi: 10.1016/j.ijadhadh.2016.03.025. ISSN 0143-7496.

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Based on the experience in the past and the occurrence of in-service damages, the authorities restrict today the application of adhesive bonding of composite structures for aircraft applications. However, certification limitations can be overcome if occurring disbonds within a bond are stopped by implemented design features, so called disbond stopping features. Consequently, a novel bondline architecture for bonded composite joints is proposed. By implementing a distinct rather ductile thermoplastic phase, a physical barrier for growing disbonds is obtained and thus a fail-safe design, respectively. Moreover, the joint is established by using two different joining technologies, namely adhesive bonding and thermoset composite welding. A sophisticated manufacturing technique is developed for the hybrid bondline concept to achieve a high strength joint. The joint's quality is examined by means of several analytical methods like microsections, scanning electron microscopy (SEM), and energy-dispersive X-Ray (EDX) analysis. Additionally, the mechanical performance is evaluated by static Double Cantilever Beam (DCB) and Single Lap Shear (SLS) tests.

Item URL in elib:https://elib.dlr.de/106537/
Document Type:Article
Title:A hybrid bondline concept for bonded composite joints
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Löbel, ThomasThomas.Loebel (at) dlr.deUNSPECIFIED
Holzhüter, Dirkdirk.holzhueter (at) dlr.deUNSPECIFIED
Sinapius, Michaelmichael.sinapius (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Journal or Publication Title:International Journal of Adhesion and Adhesives
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ijadhadh.2016.03.025
Page Range:pp. 229-238
Keywords:Joint design; Fracture toughness; Hybrid joints; Disbond stopping feature
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 (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Löbel, Thomas
Deposited On:16 Oct 2016 10:18
Last Modified:20 Jun 2021 15:48

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