Prevention of catastrophic failure of pressure vessels and piping: Results of pressure test with a large vessel (HCl-test)

Rauno Rintamaa, Kari Törrönen, Heikki Keinänen, Matti Sarkimo, Henrik Sundell, Heli Talja, Kari Ikonen

    Research output: Book/ReportReport

    1 Citation (Scopus)

    Abstract

    The aim of the present study was to develop a statistical model for the static strength of concrete, which would be based on the optical micro-structural analysis of concrete. The composition of concrete was analysed optically and modelled as a composite material using the statistical theory of combined parallel and serial systems of basic elements. Concrete is modelled as a composite material consisting of aggregate particles, cement paste and voids. The voids include pores larger than 15 my m in diameter and microcracks over 15 elm in length. The length of microcracks is modelled as a fictive crack corresponding to the modified Griffth's theory. The pores are also modelled as fictive cracks in accordance with the method of Bache. The location of the cracks is modelled statistically against the Poisson distribution. The random distribution of the crack direction has been taken into account in the model. The compressive and bending tensile strengths of six test specimens were calculated with the model of combined parallel and serial systems, using the results of optical microstructural analysis of the samples. The calculated values were compared with the test results. The deviation of the calculated values from the test results varied from 2.5 % to 17 % (mean 6 %) in the case of compressive strength and from 0 % to 26 % (mean 10 %) in the case of bending tensile strength. The greatest source of error was the approximative optical analysis of the mierocracks, which is to undergo further development.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    ISBN (Print)951-38-3043-8
    Publication statusPublished - 1988
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number515
    ISSN0358-5077

    Fingerprint

    piping
    crack
    vessel
    microcrack
    tensile strength
    void
    structural analysis
    compressive strength
    cement
    test
    analysis
    distribution
    material

    Keywords

    • pressure vessels
    • pipes (tubes)
    • failure
    • fracture tests

    Cite this

    Rintamaa, R., Törrönen, K., Keinänen, H., Sarkimo, M., Sundell, H., Talja, H., & Ikonen, K. (1988). Prevention of catastrophic failure of pressure vessels and piping: Results of pressure test with a large vessel (HCl-test). Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 515
    Rintamaa, Rauno ; Törrönen, Kari ; Keinänen, Heikki ; Sarkimo, Matti ; Sundell, Henrik ; Talja, Heli ; Ikonen, Kari. / Prevention of catastrophic failure of pressure vessels and piping : Results of pressure test with a large vessel (HCl-test). Espoo : VTT Technical Research Centre of Finland, 1988. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 515).
    @book{17ca9b41402f487cb6c4d0a64367e83c,
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    abstract = "The aim of the present study was to develop a statistical model for the static strength of concrete, which would be based on the optical micro-structural analysis of concrete. The composition of concrete was analysed optically and modelled as a composite material using the statistical theory of combined parallel and serial systems of basic elements. Concrete is modelled as a composite material consisting of aggregate particles, cement paste and voids. The voids include pores larger than 15 my m in diameter and microcracks over 15 elm in length. The length of microcracks is modelled as a fictive crack corresponding to the modified Griffth's theory. The pores are also modelled as fictive cracks in accordance with the method of Bache. The location of the cracks is modelled statistically against the Poisson distribution. The random distribution of the crack direction has been taken into account in the model. The compressive and bending tensile strengths of six test specimens were calculated with the model of combined parallel and serial systems, using the results of optical microstructural analysis of the samples. The calculated values were compared with the test results. The deviation of the calculated values from the test results varied from 2.5 {\%} to 17 {\%} (mean 6 {\%}) in the case of compressive strength and from 0 {\%} to 26 {\%} (mean 10 {\%}) in the case of bending tensile strength. The greatest source of error was the approximative optical analysis of the mierocracks, which is to undergo further development.",
    keywords = "pressure vessels, pipes (tubes), failure, fracture tests",
    author = "Rauno Rintamaa and Kari T{\"o}rr{\"o}nen and Heikki Kein{\"a}nen and Matti Sarkimo and Henrik Sundell and Heli Talja and Kari Ikonen",
    year = "1988",
    language = "English",
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    publisher = "VTT Technical Research Centre of Finland",
    number = "515",
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    Rintamaa, R, Törrönen, K, Keinänen, H, Sarkimo, M, Sundell, H, Talja, H & Ikonen, K 1988, Prevention of catastrophic failure of pressure vessels and piping: Results of pressure test with a large vessel (HCl-test). Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 515, VTT Technical Research Centre of Finland, Espoo.

    Prevention of catastrophic failure of pressure vessels and piping : Results of pressure test with a large vessel (HCl-test). / Rintamaa, Rauno; Törrönen, Kari; Keinänen, Heikki; Sarkimo, Matti; Sundell, Henrik; Talja, Heli; Ikonen, Kari.

    Espoo : VTT Technical Research Centre of Finland, 1988. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 515).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - Prevention of catastrophic failure of pressure vessels and piping

    T2 - Results of pressure test with a large vessel (HCl-test)

    AU - Rintamaa, Rauno

    AU - Törrönen, Kari

    AU - Keinänen, Heikki

    AU - Sarkimo, Matti

    AU - Sundell, Henrik

    AU - Talja, Heli

    AU - Ikonen, Kari

    PY - 1988

    Y1 - 1988

    N2 - The aim of the present study was to develop a statistical model for the static strength of concrete, which would be based on the optical micro-structural analysis of concrete. The composition of concrete was analysed optically and modelled as a composite material using the statistical theory of combined parallel and serial systems of basic elements. Concrete is modelled as a composite material consisting of aggregate particles, cement paste and voids. The voids include pores larger than 15 my m in diameter and microcracks over 15 elm in length. The length of microcracks is modelled as a fictive crack corresponding to the modified Griffth's theory. The pores are also modelled as fictive cracks in accordance with the method of Bache. The location of the cracks is modelled statistically against the Poisson distribution. The random distribution of the crack direction has been taken into account in the model. The compressive and bending tensile strengths of six test specimens were calculated with the model of combined parallel and serial systems, using the results of optical microstructural analysis of the samples. The calculated values were compared with the test results. The deviation of the calculated values from the test results varied from 2.5 % to 17 % (mean 6 %) in the case of compressive strength and from 0 % to 26 % (mean 10 %) in the case of bending tensile strength. The greatest source of error was the approximative optical analysis of the mierocracks, which is to undergo further development.

    AB - The aim of the present study was to develop a statistical model for the static strength of concrete, which would be based on the optical micro-structural analysis of concrete. The composition of concrete was analysed optically and modelled as a composite material using the statistical theory of combined parallel and serial systems of basic elements. Concrete is modelled as a composite material consisting of aggregate particles, cement paste and voids. The voids include pores larger than 15 my m in diameter and microcracks over 15 elm in length. The length of microcracks is modelled as a fictive crack corresponding to the modified Griffth's theory. The pores are also modelled as fictive cracks in accordance with the method of Bache. The location of the cracks is modelled statistically against the Poisson distribution. The random distribution of the crack direction has been taken into account in the model. The compressive and bending tensile strengths of six test specimens were calculated with the model of combined parallel and serial systems, using the results of optical microstructural analysis of the samples. The calculated values were compared with the test results. The deviation of the calculated values from the test results varied from 2.5 % to 17 % (mean 6 %) in the case of compressive strength and from 0 % to 26 % (mean 10 %) in the case of bending tensile strength. The greatest source of error was the approximative optical analysis of the mierocracks, which is to undergo further development.

    KW - pressure vessels

    KW - pipes (tubes)

    KW - failure

    KW - fracture tests

    M3 - Report

    SN - 951-38-3043-8

    T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

    BT - Prevention of catastrophic failure of pressure vessels and piping

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Rintamaa R, Törrönen K, Keinänen H, Sarkimo M, Sundell H, Talja H et al. Prevention of catastrophic failure of pressure vessels and piping: Results of pressure test with a large vessel (HCl-test). Espoo: VTT Technical Research Centre of Finland, 1988. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 515).