Experimental investigation of the load bearing capacity of inserts embedded in thermoplastic compositesWednesday (29.04.2020) 14:20 - 14:40 Room 2
Fibre reinforced thermoplastics (FRT) are predestined for use in lightweight structures especially for high-volume applications. Currently, the multi-material design is focussed in many research and development activities. To ensure an optimal load bearing capacity of the hybrid structure appropriate joining systems are required. In many areas of lightweight construction the use of metal inserts is established as a reliable and efficient joining technique for composite structures. In [Reference] a technology for process integrated embedding of inserts in FRT while compression moulding was presented. The technology is based on the concept of moulding holes by a pin and simultaneously placing an insert in the moulded hole. As a result, the fibres are not severed, but are reoriented around the insert without fibre damage. In this paper the performance of embedded inserts is compared to subsequently integrated commercial solutions like blind rivet nuts. Therefore, three different types of embedded inserts and three conventional solutions are investigated. The load bearing capacity is evaluated for different loading conditions. Tensile tests in plane and out of plane as well as torsion tests are carried out. It is shown that higher loads can be applied by the use of embedded inserts. In addition, these have a lower weight than the conventional solutions considered and have no disturbing contours, i.e. they are flush with the composites surface on both sides. Consequently, the process integrated embedding of inserts has a high potential for use in lightweight constructions in multi-material-design.