Integration of piezoceramic and electronic functional elements in glass fibre-reinforced polyurethane composite structures
For serial applications of intelligent composite structures, large-scale production technologies are required. Glass fibre polyurethane composites (GPC) are particularly suitable for the fabrication of intelligent lightweight parts with integrated sensor elements. Within the Collaborative Research Center / Transregio 39 "PT-PIESA" a novel Multi-Fibre-Injection (MFI) process based on the highly productive Long- Fibre-Injection (LFI) technology is developed. Piezoceramic and electronic functional elements are embedded in the composite structure to realise a piezoelectric functional element with sensory properties. Thus the previously separate production steps module manufacture and part fabrication are merged into one efficient production process. Theoretical and experimental studies pertaining to the elaboration of scientific and technological basics for the production of GPC with integrated sensor elements are presented. Manufacture of different piezoceramic components like fibres or pearls and the development of adapted electronic functional elements is introduced. In first processing studies the effects of process related loads on integrated piezoceramic and electronic functional elements are analysed. Therefore several modes of integration as well as different alignments of PZT-fibres and their interaction with the expanding und curing fibre matrix mixture are investigated.