0375437 - ÚTAM 2013 RIV US eng J - Journal Article
Minster, Jiří - Micka, Michal
Numerical Simulation of an Indentation Process for Defining the Viscoelastic Characteristics of Time-Dependent Materials.
Journal of Materials Science and Engineering B. Roč. 2, č. 1 (2012), s. 81-89. ISSN 2161-6221
R&D Projects: GA AV ČR(CZ) IAA200710801
Institutional support: RVO:68378297
Keywords : microindentation * numerical simulation * viscoelastic characteristics
Subject RIV: JJ - Other Materials

The aim of the paper is to find a practical numerical approach to define the time-dependent mechanical characteristics of a rheonomic material from microindentation data. The ANSYS FEM program for viscoelastic bodies is used for numerical simulations of the indentation process. All three parts of the indentation process (loading), dwell time with indentation creep and unloading, are well modelled and the histories of the relaxation modulus, the bulk or shear moduli are defined in the form of Prony series. The results obtained by numerical simulation are compared with satisfactory accuracy to the values from an analytical approach based on the linear theory of viscoelasticity and to results of standard macro tests of the material, which had been previously measured by the authors
Permanent Link: http://hdl.handle.net/11104/0208088