Počet záznamů: 1  

Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates

  1. 1.
    0385918 - ÚFM 2013 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
    Bermejo, R. - Chlup, Zdeněk - Šestáková, L. - Ševeček, O. - Danzer, R.
    Strategies to Optimize the Strength and Fracture Resistance of Ceramic Laminates.
    Mechanical Properties and Performance of Engineering Ceramics and Composites VII. Hoboken, NJ, USA: John Wiley & Sons, Inc.,, 2012 - (Singh, D.; Salem, J.; Halbig, M.; Mathur, S.), s. 163-174. Ceramic Engineering and Science Proceedings. ISBN 9781118205884.
    [International Conference on Advanced Ceramics and Composites /36./. Daytona Beach, Florida (US), 24.01.2012-25.01.2012]
    Institucionální podpora: RVO:68081723
    Klíčová slova: Ceramic * Laminate * Fracture toughness
    Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla
    http://onlinelibrary.wiley.com/doi/10.1002/9781118217467.ch16/summary

    Layered ceramics, compared to conventional monolithic ceramics, are good choices for highly- loaded structural applications because they exhibit greater fracture resistance, higher strengths and better mechanical reliability (i.e. they are flaw tolerant materials). The use of tailored residual compressive stresses in the layers is a key parameter to adjust these properties. In this work ceramic laminates are analyzed which have internal residual compressive stresses. The most important factors having influence on the strength and fracture resistance of these laminates are discussed. A fracture mechanics analysis is employed to estimate the crack growth resistance of the material as a function of the crack length. It is found that the proper selection of a suitable strain mismatch (responsible for the generation of residual stresses), volume ratio of the layer materials and thickness and distribution of individual layers are crucial to achieve a high fracture resistance and/or a high lower limit (threshold) for strength in ceramic laminates. Design guidelines to avoid cracking of layers associated with high residual stresses are also provided. Design criteria to optimize strength and fracture resistance in advanced ceramics to be used in engineering applications are established.
    Trvalý link: http://hdl.handle.net/11104/0215243

     
     
Počet záznamů: 1  

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