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2018
Conference Paper
Title

Hybrid materials - Joining of polymers and metals

Abstract
Technologies for joining metals and polymers play a key role in exploiting the potential of lightweight design while also considering economic factors like production cost and material cost. Hybrid joining offers the opportunity to use the right material at the right position of the structural component. Especially connecting thermoplastic polymers and metals promises great potential for optimum solutions with respect to creating lightweight structures economically. The interphase between the two materials plays an important role in achieving high strength of the joint. The metal part is pre-treated by a laser-process which generates a structure of Cone-Like-Portrusions (CLP) or a line structure on the surface. These structures represent undercuts on a microscopic scale and increase the surface area. During manufacturing the melt penetrates into these undercuts and creates the joint via three different mechanisms: positive locking, adhesion, and friction. The present paper evaluates different sets of process parameters for thermal welding by laser, injection moulding and pressing by means of quasi-static tensile tests. Uniaxial and multiaxial fatigue test results are presented for the most promising sets of process parameters. On a demonstrator part, a roof crossrail from a luxury car, the technology is validated.
Author(s)
Spancken, Dominik  
Laveuve, Dominik M.
Beck, J.
Stötzner, Norbert
Fraunhofer-Institut für Chemische Technologie ICT  
Straeten, Kira van der  
Büter, Andreas
Henning, Frank  
Mainwork
18th European Conference on Composite Materials, ECCM 2018. Online resource  
Conference
European Conference on Composite Materials (ECCM) 2018  
Link
Link
Language
English
Fraunhofer-Institut für Chemische Technologie ICT  
Fraunhofer-Institut für Lasertechnik ILT  
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF  
Keyword(s)
  • fatigue

  • hybrid joints

  • hybrid materials

  • Laser Pretreatment

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