Today, fiber reinforced materials are present in a wide field of industrial applications. Short glass fiber reinforcedcomposites are mainly used in automotive, aerospace and medical sectors. In recent years, endless fiber reinforcedthermoplastics have gained importance as construction material, especially for lightweight assembly. There are differentmethods of joining thermoplastic materials such as vibration, resistance and induction welding. Another process is lasertransmission welding, which can be characterized by its excellent reproducibility, high flexibility and potential forautomation. Typically, laser transmission welding can be applied for joining unreinforced or glass fiber reinforcedthermoplastic parts. This welding process was now adapted to heat conduction welding for joining thermoplastic CFRPto itself. The goal of these investigations was to determine the influence of the matrix material on the weld seam quality.The experiments were conducted with a carbon fiber fabric reinforced polyphenylene sulfide with natural matrix materialas well as containing carbon black. In the first step, the temperature distribution at the upper joining member, where theheat generation occurred, was evaluated. The heat affected width was determined and correlated to the processtemperatures in order to develop a process model. In a next step, lap shear samples were welded and tested. These resultswere then correlated with previous results.
展开▼
