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).
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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.",
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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).