Observation of viscoelastic displacement recovery after microindentation

0353499 - ÚTAM 2012 RIV NL eng J - Článek v odborném periodiku
Minster, Jiří - Novák, Z.
Observation of viscoelastic displacement recovery after microindentation.
Mechanics of Time-Dependent Materials. Roč. 15, č. 3 (2011), s. 317-325. ISSN 1385-2000. E-ISSN 1573-2738
Grant CEP: GA AV ČR(CZ) IAA200710801
Výzkumný záměr: CEZ:AV0Z20710524
Klíčová slova: quasi-homogenous and quasi-isotropic viscoelastic material * microindentation * viscoelastic compliance * interferometry * creep recovery
Kód oboru RIV: JI - Kompozitní materiály
Impakt faktor: 1.109, rok: 2011

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.
Trvalý link: http://hdl.handle.net/11104/0192739