Determination of material data in the ultrasonic range – Characterisation of temperature-dependent storage and loss moduli at a typical ultrasonic welding frequency of 20 kHz

In order to permit the simulative assessment of the weldability at an early stage in the development process of new ultrasonic joining components, a new approach was developed for determining the required frequency-dependent and temperature-dependent storage and loss moduli. As an example, the parameters were established for three different materials (PA 6, PP and PMMA) in the solid range. Within the framework of the validation tests, a substantial rise in the prediction quality of the oscillation behaviour was achieved by the chosen approach in comparison with the state of the art. Particularly in the high-frequency oscillation range up to 20 kHz, the methodology thus constitutes a promising alternative for determining the viscoelastic material properties.