Publication detail
Fracture Mechanics Model of a Weld Bead
ŠEVČÍK, M. HUTAŘ, P. KNÉSL, Z. NEZBEDOVÁ, E. LACH, R. GRELLMANN, W.
Czech title
Lomově mechanický model svarového výronku
English title
Fracture Mechanics Model of a Weld Bead
Type
conference paper
Language
en
Original abstract
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.
Czech abstract
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.
English abstract
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.
Keywords in Czech
creep; vrub; koncentrace napětí; triaxialita napětí; svar polymerů
Keywords in English
creep; notch; stress concentration; stress triaxiality; polymer weld
RIV year
2011
Released
28.06.2011
Location
Merseburg
ISBN
978-3-86829-400-2
Book
13. Tagung Problemseminar Deformation und Bruchverhalten von Kunstoffen
Pages from–to
570–573
Pages count
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"
}