Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail publikace
ZOUHAR, M. HUTAŘ, P. ŠEVČÍK, M. NÁHLÍK, L.
Originální název
Pressure pipe damage: Numerical estimation of point load effect
Typ
článek v časopise - ostatní, Jost
Jazyk
angličtina
Originální abstrakt
The most relevant loading conditions for real polymer pipe systems are not only internal pressure, but also loading caused by sand embedding including bending or different kinds of point loads. It has been shown that service lifetime of buried pipes can be reduced especially due to stress concentration caused by external point loads. If the pipe is loaded locally the stress is concentrated here and a crack can initiate at this position or the existing crack can be affected by corresponding stress redistribution. In the paper the effect of the hard indenter, Poissons ratio, hoop stress level and pipe wall thickness on the crack shape was estimated using numerical simulations of the creep crack propagation based on finite element method. Relation between crack length and crack width was found and expressed by simple relationship. A deeper understanding of the point load effect in order to prevent unexpected failure of the pipelines is of paramount importance for pipeline design.
Klíčová slova
polymer pressure pipes, point load, stress intensity factor, crack shape prediction
Autoři
ZOUHAR, M.; HUTAŘ, P.; ŠEVČÍK, M.; NÁHLÍK, L.
Rok RIV
2013
Vydáno
10. 1. 2013
ISSN
1013-9826
Periodikum
Key Engineering Materials (print)
Ročník
525-526
Číslo
1
Stát
Švýcarská konfederace
Strany od
177
Strany do
180
Strany počet
4
BibTex
@article{BUT96846, author="Michal {Zouhar} and Pavel {Hutař} and Martin {Ševčík} and Luboš {Náhlík}", title="Pressure pipe damage: Numerical estimation of point load effect", journal="Key Engineering Materials (print)", year="2013", volume="525-526", number="1", pages="177--180", issn="1013-9826" }