Fragmentation of viscoelastic surface layers
Theoretische Polymerphysik, Universität Freiburg, Rheinstraße 12,
D-79104 Freiburg i.Br., Germany
2 P.N. Lebedev Physical Institute of the Academy of Sciences of Russia, Leninsky Prospekt 53, Moscow 117924, Russia
Accepted: 22 September 1997
Starting from a one-dimensional model, we investigate the influence of viscoelasticity on the fragmentation of a surface layer, wich covers a bulk substrate. The layer is modelled as a chain of breakable springs, which is coupled to the substrate via Kelvin-Voigt elements. Letting the substrate expand, we study the dependence of the fracture patterns on the strain rate. For high strain rates the initial stage of fragmentation process is characterized by the breakage of spring which are close to each other.
PACS: 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1997