National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Geometrické faktory mikroindentace vazkopružných materiálů ostrým indentorem
Minster, Jiří ; Bláhová, O. ; Lukeš, J. ; Němeček, J.
Two approaches are applied to define short-term histories of creep compliance of a common epoxy composition loaded by a step load using microindentation data with the aim to compare the results with previously received data from standard macro measurements and to examine limitations of the method.
Měření vazkopružných vlastností termosetického materiálu pomocí nanoindentace
Lukeš, J. ; Němeček, J. ; Minster, Jiří
Mechanical properties of thermosetting material were studied by means of nanoindentation. A 3x3 matrix of indents was carried out in the load controlled regime. A 5-parameter combined Kelvin-Voigt-Maxwell creep model was successfully used to model a typical loading short-time behaviour of the material. Viscoelastic constants of the model have been found both for loading and dwell parts of the test.
Mechanické charakteristiky reonomních materiálů stanovené užitím mikro- a nanoindentace
Minster, Jiří ; Bláhová, O. ; Le Clere, R.
The paper deals with the disspersion of instrumented indentation measurements of rheonomic materials caused by state and properties of tested samples. It demonstrates the important influence of the temperature of the tested material, its viscoelastic behaviour, techology and microinhomogeneities on the microhardness and instantaneous elastic modulus values measured using the Nano Indenter XP and the microindenter MHT 10V.

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