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Observation of viscoelastic displacement recovery after microindentation
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SYSNO ASEP 0353499 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Observation of viscoelastic displacement recovery after microindentation Author(s) Minster, Jiří (UTAM-F) RID, SAI
Novák, Z. (CZ)Number of authors 2 Source Title Mechanics of Time-Dependent Materials - ISSN 1385-2000
Roč. 15, č. 3 (2011), s. 317-325Number of pages 9 s. Publication form on-line www - on-line www Language eng - English Country NL - Netherlands Keywords quasi-homogenous and quasi-isotropic viscoelastic material ; microindentation ; viscoelastic compliance ; interferometry ; creep recovery Subject RIV JI - Composite Materials R&D Projects IAA200710801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20710524 - UTAM-F (2005-2011) UT WOS 000293911800007 EID SCOPUS 80053609937 DOI 10.1007/s11043-010-9129-2 Annotation This paper reports on the time-dependent recovery process in a local part of a quasi-homogeneous and quasi-isotropic viscoelastic hemisphere after microndentation unloading. After contact between an Vickers indenter and a viscoelastic material comes to an end, the recovery progression is monitored using a microscope equipped with an interferometer, and a record is made using a digital camera. The histories of the depth of the indentation and the changes in the contact area are defined. Using an approach involving direct microindentation measurements of viscoelastic properties, the viscoelastic recovery creep compliance is determined and its values are compared with the creep compliance measured by the standard macro creep method, and with the creep compliance derived from instrumented microindentation. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2012
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