Počet záznamů: 1

Estimation of apparent fracture toughness of ceramic laminates

  1. 1.
    0337562 - UFM-A 2010 RIV NL eng J - Článek v odborném periodiku
    Náhlík, Luboš - Šestáková, Lucie - Hutař, Pavel
    Estimation of apparent fracture toughness of ceramic laminates.
    Computational Materials Science. Roč. 46, č. 3 (2009), s. 614-620 ISSN 0927-0256
    Grant CEP: GA AV ČR(CZ) KJB200410803
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: bimaterial * strain energy density factor * ceramic composite * apparent fracture toughness
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Impakt faktor: 1.522, rok: 2009

    The paper presented deals with the fracture behavior of ceramic laminates. The residual stresses in individual layers of Al2O3/5vol.%t-ZrO2 (ATZ) and Al2O3/30vol.%m-ZrO2 (AMZ) are determined. Assumptions concerning linear elastic fracture mechanics and small scale yielding are considered. In this frame the procedure based on a generalization of Sih’s strain energy density factor to the case of a crack touching the interfaces between two dissimilar materials is used for determination of effective values of the stress intensity factor on material interfaces. An important increase of fracture toughness at the AMZ/ATZ interface was predicted in comparison to the fracture toughness of individual material components. Predicted values were compared with data available in the literature and mutual good agreement was found.
    Trvalý link: http://hdl.handle.net/11104/0181526