Publication detail

Effect of the residual stresses on the slow crack growth

HUTAŘ, P. ŠEVČÍK, M. KUČERA, J. ZOUHAR, M. LUKY, R. NÁHLÍK, L.

Original Title

Effect of the residual stresses on the slow crack growth

Type

abstract

Language

English

Original Abstract

Using linear elastic fracture mechanics a new methodology for a lifetime assessment of internally pressurized polymer pipes was developed. The concept is based on the numerical calculation of stress intensity factors for pipes under different loading conditions in combination with experimentally determined creep crack growth kinetics. The main aim of the work is to estimate the effect of residual stresses on the creep crack kinetics. Based on FEM calculations, the evolution of a creep crack in the case of internal pressure loading taking into account residual stresses, is obtained. An approximate equation for the stress intensity factor in the pipe with residual stresses is presented and good agreement with the numerically obtained data is found. The results and methodology presented can be a powerful tool for estimation of a plastic pipes lifetime.

Keywords

residual stresse, crack growth, stress intensity factor

Authors

HUTAŘ, P.; ŠEVČÍK, M.; KUČERA, J.; ZOUHAR, M.; LUKY, R.; NÁHLÍK, L.

Released

24. 9. 2012

BibTex

@misc{BUT95321,
  author="Pavel {Hutař} and Martin {Ševčík} and Jaroslav {Kučera} and Michal {Zouhar} and Robin {Luky} and Luboš {Náhlík}",
  title="Effect of the residual stresses on the slow crack growth",
  booktitle="XVI International Plastic Pipes Conference 2012",
  year="2012",
  note="abstract"
}