Combined joining technique for thermoplastic composites with embedded sensor networks

Lightweight components suitable for high-volume production are realizable by utilizing textile-reinforced thermoplastics. These composite structures can be equipped with additional functionalities by embedding sensor networks. With regard to assembly processes, material- and function-adapted joining techniques are required to connect such components efficiently. Therefore, the joint should enable both the transmission of mechanical loads and electrical signals. In order to fulfill these requirements, a combined joining technique based on blind riveting is analyzed in this article. Specimen plates made of glass-fiber-reinforced polypropylene were fabricated by compression molding. They contained adapted conductors embedded between the glass-fiber-reinforced polypropylene layers. In a next step, specimens were joined by blind riveting. The experimental analysis of several joint configurations revealed differences in interface quality and electrical performance. Finally, the reliability of the selected joining concept was verified by the experimental investigation of single-lap specimens under thermal and tensile loading.