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Tragverhalten vorgespannter mechanischer Fügeverbindungen in Strukturbauteilen aus Faserverbund-Werkstoffen

Schlussbericht zu dem über die AiF im Rahmen des Programms zur Förderung der Industriellen Gemeinschaftsforschung und -entwicklung (IGF) vom Bundesministerium für Wirtschaft und Technologie geförderten Vorhaben 16838BR der AiF-Forschungsvereinigung, Europäische Forschungsgesellschaft für Blechverarbeitung e.V.. Bewilligungszeitraum: 01.01.2011-30.04.2013
 
: Denkert, Christian
: Wanner, Martin-Christoph

Rostock, 2013, 114 S., 20 S.
Reportnr.: AiF 16838BR
Deutsch
Bericht
Fraunhofer IPA ()
Fügen; Bolzen; Montage; Faserverbundwerkstoff (FWV)

Abstract
Due to its user-independent assembly and less deviation in pretension lock bolt systems have a significant advantage over conventionale HV-screws. In the industrial environment of an ongoing endeavour to lightweight and the resulting efforts to utilize fiber plastic composites, the use of the lock bolts is facing different challenges. As part of research project, a vacuum-injection-method is established, which allows a flexible and cost-effective production of test laminates. The quality of the product laminates is evaluated using statistical procedures.
Based on the knowledge about design stndards and guideline for screw connections nad for lock bolt systems, this research, report takes on the question of the transferability of these design rules onto fiber art material. The basic interest in this context is the carrying capacity of shear force loaded lock bolts connections and the determination of yielding in the laminate thickness direction.
For shear force loaded lock bolt connections the possible failures will be listed and the accompannying arithmetical verification presented. Due to the variety of fiber plastic composites, whose selection mainly depends on the type and amount of the load, in this project trial-based assessments are determined and the capacities to withstand certain stresses are investigated. The investigation is focused on the determination of the compliances and the ultimate interface pressure, the shear and bearing stress experiments for the experimental determination of the bearing stress coeddicient as well as the use of the statistic test planning and evaluation in respect to the use of slip-restiant preloaded lock bolt connections.
Finally, the experimental determined stress restiance (ultimate surface pressure, ultimate bearing resistance, slip resistance) are compared with the calculated stress resistance and literature values.

: http://publica.fraunhofer.de/dokumente/N-316043.html