Comparison of two creep crack growth parameters, C* and Q*, with F.E. analysis

M. Yatomi, K. M. Nikbin, A. T. Yokobori

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This paper presents a numerical study of creep crack growth in a compact tension specimen. The constitutive behaviour of steel is described by a power law creep model. A damage-based approach is used to predict the crack propagation rate. Elastic-plastic-creep analyses are performed to predict crack extension under plane stress and plane strain conditions. The same load is applied at three different temperatures, 320°C, 360°C and 400°C. In addition, three different loads are applied at the same temperature, 360°C. Two parameters, C* and Q* parameters, are applied to characterise creep crack growth (CCG) rate for comparison. When C* parameter is used for the characterisation of CCG rate, tail parts are observed in the early stage for all F.E. predictions, while for Q* parameters these are not appeared. The F.E. results indicate that under fully steady state da/dt-C* relationship is little dependent on temperatures, load and stress conditions, while under early stage of CCG da/dt-Q* relationship is little dependent on temperatures, load and stress conditions.

    Original languageEnglish
    Title of host publication11th International Conference on Fracture 2005, ICF11
    Pages3197-3202
    Number of pages6
    Publication statusPublished - 2005 Dec 1
    Event11th International Conference on Fracture 2005, ICF11 - Turin, Italy
    Duration: 2005 Mar 202005 Mar 25

    Publication series

    Name11th International Conference on Fracture 2005, ICF11
    Volume5

    Other

    Other11th International Conference on Fracture 2005, ICF11
    CountryItaly
    CityTurin
    Period05/3/2005/3/25

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Yatomi, M., Nikbin, K. M., & Yokobori, A. T. (2005). Comparison of two creep crack growth parameters, C* and Q*, with F.E. analysis. In 11th International Conference on Fracture 2005, ICF11 (pp. 3197-3202). (11th International Conference on Fracture 2005, ICF11; Vol. 5).