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Enhanced tensile strength of composite joints by using staple-like pins: Working principles and experimental validation

Löbel, Thomas and Kolesnikov, Boris and Scheffler, Sven and Stahl, Arne and Hühne, Christian (2013) Enhanced tensile strength of composite joints by using staple-like pins: Working principles and experimental validation. Composite Structures (106), pp. 453-460. Elsevier. DOI: 10.1016/j.compstruct.2013.06.020 ISSN 0263-8223

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S0263822313003139

Abstract

In this study, z-pinning by implementing staples as load-bearing elements for CFRP dou-ble-lap joints is presented. Both conventional staples and purpose-made stainless steel wire staples were used as fastener elements. Two different inserting methods were inves-tigated. In addition, the influence of the element’s diameter was examined. An overall in-crease of 28% in tensile strength was determined for stand-alone staples in comparison to bolted joints. A patented principle of edge-staple showed an increase of 23% tensile strength in comparison to purely bonded joints. The geometrical form of staples provides an effective way in terms of axial fixation, since pull out did not occur. Furthermore, the staple principle provides the opportunity to use the elements as supporting entities for bonded joints by reducing peak stresses and suppressing peel. Nevertheless, the test re-sults showed a decrease of the in-plane strength with increasing number of elements, which should be considered for joint design. The study represents a first step in technology evaluation and demonstrates the potential of stapled joints.

Item URL in elib:https://elib.dlr.de/83877/
Document Type:Article
Title:Enhanced tensile strength of composite joints by using staple-like pins: Working principles and experimental validation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Löbel, ThomasThomas.Loebel (at) dlr.deUNSPECIFIED
Kolesnikov, BorisUNSPECIFIEDUNSPECIFIED
Scheffler, SvenUNSPECIFIEDUNSPECIFIED
Stahl, ArneUNSPECIFIEDUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.compstruct.2013.06.020
Page Range:pp. 453-460
Publisher:Elsevier
ISSN:0263-8223
Status:Published
Keywords:Staples, Pins, Through-thickness Reinforcement, CFRP-joints
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Löbel, Thomas
Deposited On:19 Dec 2013 20:46
Last Modified:19 Dec 2013 20:46

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