Viskoelastizität und Anisotropie von Kunststoffen: Ultraschallbasierte Methoden zur Materialparameterbestimmung

Abstract

In this paper, various aspects of ultrasonic measurement engineering are discussed with regard to viscoelastic materials. First, a viscoelastic material model is developed, taking into account anisotropy and causality. In the following, two different methods for the characterization of material parameters by means of guided ultrasonic waves in cylindrical and plate-like structures are presented, as well as advantages and disadvantages discussed. In this context, consideration is also given to material aging. Thermoplastics, such as polypropylene and polyamide 6, are investigated. To characterize the anisotropy, reference is also made to glass fiber reinforced plate structures with a thermoplastic matrix.