Time-dependent mechanical characteristics measured through the use of a microindentation technique

0350945 - ÚTAM 2011 RIV NL eng J - Journal Article
Minster, Jiří - Bláhová, O. - Lukeš, J. - Němeček, J.
Time-dependent mechanical characteristics measured through the use of a microindentation technique.
Mechanics of Time-Dependent Materials. Roč. 14, č. 3 (2010), s. 243-251. ISSN 1385-2000. E-ISSN 1573-2738
R&D Projects: GA AV ČR(CZ) IAA200710801
Institutional research plan: CEZ:AV0Z20710524
Keywords : materials testing * microindentation * viscoelastic compliance * relaxation modulus
Subject RIV: JI - Composite Materials
Impact factor: 0.955, year: 2010

Under accepted simplifications about the linear viscoelastic background of the problem and the time-independent value of the Poisson’s ratio, this paper aims to compare the short-term histories of the viscoelastic functions of a common time-dependent material, e.g. viscoelastic compliance and relaxation modulus measured using a microindentation technique, with data derived from standard macro measurements. Two nano/microindenters were used (Hysitron Triboscan and Nano XP Indenter) at two different laboratories. Four special time-dependent loading histories were applied: indentation under a step load, indentation under a constant load rate, indentation with a fixed depth of penetration and indentation under constant rate of penetration. The goal of the study is to assess the potential of this approach.
Permanent Link: http://hdl.handle.net/11104/0190804