Detail publikace
Lomově mechanický model svarového výronku
ŠEVČÍK, M. HUTAŘ, P. KNÉSL, Z. NEZBEDOVÁ, E. LACH, R. GRELLMANN, W.
Český název
Lomově mechanický model svarového výronku
Anglický název
Fracture Mechanics Model of a Weld Bead
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
In the case of large diameter HDPE and/or PP pipes the most usual joint is the butt weld. This paper focuses on fracture mechanics modeling of a weld bead. To this aim a stress concentrator created by connection between the weld bead and the pipes free surface is considered as a notch. In the first part of the contribution the connection of a weld bead and the pipes free surface is studied from the point of linear elastic fracture mechanics and the influence of high stress concentration in this region on crack initiation and propagation is discussed. In the second part the behavior of the weld bead under creep loading is studied. It is demonstrated that in the case of creep loading conditions the existence of stress concentrators caused by the weld bead has no negative influence on the life time of welded pipes.
Český abstrakt
V této práci je studován vliv geometrie svarového výronku u svaru polymerního potrubí na chování creepové trhliny. Ukázalo se, že vlivem triaxiality napětí je životnost zkušebního vzorku při creepovém namáhání srovnatelná s nevrubovaným vzorkem.
Anglický abstrakt
In the case of large diameter HDPE and/or PP pipes the most usual joint is the butt weld. This paper focuses on fracture mechanics modeling of a weld bead. To this aim a stress concentrator created by connection between the weld bead and the pipes free surface is considered as a notch. In the first part of the contribution the connection of a weld bead and the pipes free surface is studied from the point of linear elastic fracture mechanics and the influence of high stress concentration in this region on crack initiation and propagation is discussed. In the second part the behavior of the weld bead under creep loading is studied. It is demonstrated that in the case of creep loading conditions the existence of stress concentrators caused by the weld bead has no negative influence on the life time of welded pipes.
Klíčová slova česky
creep; vrub; koncentrace napětí; triaxialita napětí; svar polymerů
Klíčová slova anglicky
creep; notch; stress concentration; stress triaxiality; polymer weld
Rok RIV
2011
Vydáno
28.06.2011
Místo
Merseburg
ISBN
978-3-86829-400-2
Kniha
13. Tagung Problemseminar Deformation und Bruchverhalten von Kunstoffen
Strany od–do
570–573
Počet stran
598
BIBTEX
@inproceedings{BUT88375,
author="Martin {Ševčík} and Pavel {Hutař} and Zdeněk {Knésl} and Eva {Nezbedová} and Ralf {Lach} and Wolfgang {Grellmann},
title="Fracture Mechanics Model of a Weld Bead",
booktitle="13. Tagung Problemseminar Deformation und Bruchverhalten von Kunstoffen",
year="2011",
month="June",
pages="570--573",
address="Merseburg",
isbn="978-3-86829-400-2"
}