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Three-point bending test on CFRP-steel profile hybrid structures

Sonntag (01.01.2040)
00:00 - 19:18 Uhr

00:00 - 19:18 Uhr

In lightweight structures the outstanding mechanical properties of carbon fibre reinforced plastics (CFRP) exhibit a high application potential. There are several ways to join structural CFRP parts to other components such as steel profiles without drilling the CFRP. Feasible joining methods are extrinsic methods like adhesive bonding or embedded metal elements, so called inserts. Another possibility are intrinsic methods where the steel profiles are embedded in the CFRP during the manufacturing process. In previous studies a shape optimized punctiform insert has been subject of research. The insert consists of a threaded shaft and a shape optimized baseplate which is embedded between the fibre layers. The performance of such inserts under different types of loading has been investigated. Now these inserts are used as the connecting element between the CFRP and the steel profile as an alternative to the state of the art adhesive bonded steel profiles. Structures like this represent an option for profiles made out of bulk CFRP or steel. While the metal component introduces ductility and shear stiffness, the CFRP provides the necessary material stiffness and good fatigue properties. Hybrid CFRP / steel structural elements, which are primarily intended to absorb crash loads, are already used in automotive series production. The samples used for the experiments are manufactured by resin transfer moulding (RTM). In addition to the data provided by the testing machine, in this work an inductive position transducer and digital image correlation (GOM Aramis) are used to determine the influence of the connection on to the performance of the samples. At the moment there is no experimental setup available which allows to gather all the data needed. In this work such an experimental setup for three-point bending tests on CFRP-steel profile hybrid structures in quasi-static and cyclic conditions will be presented.

Markus Muth
Karlsruher Institut für Technologie (KIT)
Weitere Autoren/Referenten:
  • Kay André Weidenmann
    Karlsruher Institut für Technologie (KIT)