Numerical aspects of failure modeling of amorphous thermoplastics

The present work investigates a reliable method of integrating the evolution equations of constitutive models for amorphous thermoplastics that typically utilize a power-law or exponential-type flow rule. When it comes to sudden changes in the external stress (e.g. element deletion technique in explicit finite element analysis) these functional dependencies need a special treatment to assure a numerically stable integration of the evolution equations. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)