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Finite element based optimization of a novel metal-composite-joint

  • Aerospace and automotive industries employ three main techniques to set up joints between metal and fibre reinforced plastics parts (FRP); adhesive bonding, mechanical fastening with rives/bolts and a hybrid combination. A new joint technique has been developed to combine the two advantageous mechanisms form-closure and adhesion in a fibre-friendly way. Prior is established through metal structures (pins) which are perpendicularly welded onto metal surfaces with an arc-welding-process. They intrude into the FRP during lay-up and therefore set up a first connection. The composite-matrix is responsible for latter adhesive bonding and final form closure. Finite-element-analyses of cylindrically shaped joints are carried out to get detailed knowledge of the influence of parameters like pin-number, pin-position, pin-height, pin-form sleeve-geometry, and stiffness behaviour. Long calculation times of 3D-models lead to the introduction of a corresponding 2D-axisymmetric-model which is used to run parameter-studies within a reasonable time. For this novel technique the combination of fibre-friendly form closure and adhesive bonding of interface plays a major role. A well selected amount of vertical reinforcements, their placement and geometrical dimensions will lead to a stiffer joint. Goal is to minimize fibre-deletion and overlap length to improve load-transfer and joint-strength, to reduce weight in high-strength-applications as well as the avoidance of safety rivets.

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Metadaten
Author:Stephan A. Ucsnik, Rudolf Gradinger, Ulf Noster, Dieter H. Pahr
ISSN:0083-5560
Parent Title (English):1st EUCOMAS, European Conference on Materials and Structures in Aerospace, Conference Berlin, May 26 - 27, 2008 
Publisher:VDI-Verlag
Place of publication:Düsseldorf
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2008
Release Date:2022/12/08
First Page:371
Last Page:379
Andere Schriftenreihe:VDI-Berichte ; 2028
Institutes:Fakultät Maschinenbau
Technologie-Campus Parsberg-Lupburg
Fakultät Maschinenbau / Labor Werkstoffrandschichtanalytik
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG