Počet záznamů: 1

Influence of friction on stress and strain distributions in small punch creep test models

  1. 1.
    0332110 - UFM-A 2010 RIV CH eng J - Článek v odborném periodiku
    Dymáček, Petr - Seitl, Stanislav - Milička, Karel - Dobeš, Ferdinand
    Influence of friction on stress and strain distributions in small punch creep test models.
    Key Engineering Materials. 417-418, - (2010), s. 561-564 ISSN 1013-9826.
    [International Conference on Fracture and Damage Mechanics /8./. Malta, 08.09.2009-10.09.2009]
    Grant CEP: GA AV ČR(CZ) IAA200410801; GA AV ČR(CZ) 1QS200410502
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: small punch test * creep * chromium steel * finite element method
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    www.scientific.net/KEM.417-418.561

    The FEM modeling of small punch tests on miniaturized thin discs (SPT) of two heat resistant steels was performed. The FE models did represent the creep SPT, i.e. tests with constant acting force. It was shown that different values of the surface friction coefficient used in the calculations have significant impact on the calculated stress and strain state and consequently on the deformed shape of the disc. Thus, the surface friction coefficient should be considered one of the key factors for any correct correlation of SPT and uniaxial creep test results. Proper attention must be paid to the friction conditions during the long term creep deformation. An attempt to define simple approach how to relate the SPT with uniaxial tests is suggested. Some of the calculated results are compared with experiment.
    Trvalý link: http://hdl.handle.net/11104/0177450