THEORY OF VISCOELASTICITY
Doctoral study programme in mechanical engineering
Lecturer: Doc. dr. Lidija Slemenik Perše
The behavior of polymer materials and related composites and nano-composites changes over time. This time-dependence is strongly influenced by temperature, pressure, humidity, as well as the size and shape of mechanical loading. The analysis of these dependencies constitutes the content of this course. Basic definitions and concepts. Characteristics of nonlinear time-dependent behaviour of polymers, composites, nano-composites and hybrid materials. Structural differences between materials and their effect on time-dependent mechanical properties. Interface issue. Critical nano-dimension of fillers and fibers. Material functions in time and frequency domain. Problems relating to the solving of the inverse problem of the Fredholm integrals of the first kind. Mechanical spectrum. The Emri-Tschoegl algorithm. Effects of temperature, pressure and humidity. Energy absorption at dynamic loading. Physical ageing.