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Local CFRP/Metal Hybrid Material Improving Composite Bolted Joints

Fink, Axel and Kolesnikov, Boris and Stefaniak, Daniel and Hühne , Christian (2011) Local CFRP/Metal Hybrid Material Improving Composite Bolted Joints. ICCS16 - 16th International Conference on Composite Structures, 28. Jun. - 30. Jun 2011, Porto, Portugal.

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One of the main methods currently used for joining composite components for aircraft and spacecraft applications is still mechanical fastening, which shows the advantage of reliability, detachability and inspectability and represents a well-established and well-known method from its origin in the design of metallic structures. However, to attain a satisfactory structural coupling efficiency with composite materials is much more challenging than it is for metals due to the low bearing and shear strengths, the higher notch sensitivity and the dependence on laminate configuration. These properties represent a limiting factor on the structural performance of composite structures and require additional special reinforcement techniques. One effective method of increasing the mechanical joint efficiency of highly loaded composite joints entails the reinforcement of the joining area with thin high-strength metal foils. These foils are locally embedded into the composite laminate by means of ply substitution techniques, thus avoiding any local laminate thickening and providing for a local hybrid laminate with high bearing and shear capabilities and high robustness. The local hybrid reinforcement technique is deemed an efficient approach to increase the joint efficiency of composite bolted joints, thus resulting in considerable mass savings, assembly work reductions and an increase of robustness. The present paper is intended to provide an overview about the mechanical performance and manufacturing of local hybrid CFRP/Ti and CFRP/St material as a reinforcement approach of highly loaded bolted joints highlighting some specific applications for aircraft and spacecraft structures.

Item URL in elib:https://elib.dlr.de/75335/
Document Type:Conference or Workshop Item (Speech)
Title:Local CFRP/Metal Hybrid Material Improving Composite Bolted Joints
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fink, Axelaxel.fink (at) dlr.deUNSPECIFIED
Kolesnikov, Borisboris.kolenikov (at) dlr.deUNSPECIFIED
Stefaniak, Danieldaniel.stefaniak (at) dlr.deUNSPECIFIED
Hühne , Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:28 June 2011
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Composite Structures, Bolted Joints
Event Title:ICCS16 - 16th International Conference on Composite Structures
Event Location:Porto, Portugal
Event Type:international Conference
Event Dates:28. Jun. - 30. Jun 2011
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: Stefaniak, Dr. Daniel
Deposited On:30 Mar 2012 10:07
Last Modified:30 Mar 2012 10:07

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