IMPACT OF CREEP ON FLANGE CLAMPING FORCE

Authors

  • Jan Plášek Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech Republic
  • Tomáš Ridoško Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech Republic
  • Jan Ekr Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech Republic
  • Jiří Kytýr Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech Republic
  • Roman Gratza Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, Czech Republic

DOI:

https://doi.org/10.14311/CEJ.2018.02.0019

Keywords:

Creep modulus, Clamping force, Flange connection, FEM, ANSYS

Abstract

The study presents a numerical analysis of the impact of creep in thermoplastic stub ends on the flange clamping force of a thermoplastic pipe flange connection. The analysis uses available creep modulus values that depend on the stress level, temperature and time. A method that takes the creep modulus into account is proposed and applied to four different detailed variants with the aid of the finite element method. The calculations were performed for selected times at a constant temperature and with static load. The obtained results show that the influence of creep in thermoplastic stub ends causes a substantial reduction in flange clamping force in less than one year.

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References

Jirásek M, Zeman J., 2006. Přetváření a porušování materiálů. Dotvarování, plasticita, lom a poškození. (Nakladatelství ČVUT, Praha. ISBN: 80-01-03555-7)

Sobotka Z., 1981. Reologie hmot a konstrukcí. (Academia, Praha)

Osswald T. A., Menges G., 2003. Materials Science of Polymers for Engineers. (2nd Edition, Carl Hanser Verlag, Munich. ISBN: 3-446-22464-5)

EN 1778, 2000. Characteristic values for welded thermoplastics constructions – Determination of allowable stresses and moduli for design of thermoplastics equipment

Belytschko T., Liu W. K., Moran B., 2000. Nonlinear Finite Elements for Continua and Structures. (John Wiley & Sons Ltd., New York)

ANSYS Theory Reference 16.0

Plášek J., Ridoško T., Kytýr J., Gratza R., 2013. Časová změna kruhové tuhosti korugovaného termoplastového kanalizačního potrubí. (Stavební obzor, roč. 2013, č. 03, s. 76-80, ISSN: 1210-4027)

www.simona.de

EN 12573-4, 2000. Welded static non-pressurized thermoplastic tanks. Design and calculation of flanged joints

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Published

2018-07-31

How to Cite

Plášek, J., Ridoško, T., Ekr, J., Kytýr, J., & Gratza, R. (2018). IMPACT OF CREEP ON FLANGE CLAMPING FORCE. Stavební Obzor - Civil Engineering Journal, 27(2). https://doi.org/10.14311/CEJ.2018.02.0019

Issue

Vol. 27 No. 2 (2018)

Section

Articles

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