Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Numerical methods to predict failure during the in-service welding of gas pipelines
Autore:
Sabapathy, PN; Wahab, MA; Painter, MJ;
Indirizzi:
Univ Adelaide, Dept Mech Engn, Adelaide, SA 5005, Australia Univ AdelaideAdelaide SA Australia 5005 gn, Adelaide, SA 5005, Australia CSIRO, Adelaide, SA, Australia CSIRO Adelaide SA AustraliaCSIRO, Adelaide, SA, Australia
Titolo Testata:
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
fascicolo: 6, volume: 36, anno: 2001,
pagine: 611 - 619
SICI:
0309-3247(200111)36:6<611:NMTPFD>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Keywords:
stress analysis; gas pipelines; in-service welding; numerical predictions; burn-through; hot tapping;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Wahab, MA Univ Adelaide, Dept Mech Engn, Adelaide, SA 5005, Australia UnivAdelaide Adelaide SA Australia 5005 de, SA 5005, Australia
Citazione:
P.N. Sabapathy et al., "Numerical methods to predict failure during the in-service welding of gas pipelines", J STRAIN A, 36(6), 2001, pp. 611-619

Abstract

It is evident that numerical methods have a useful role in the assessment of welding conditions for the safe in-service welding of high-pressure gas pipelines. No published work has considered the direct calculation of bum-through using a combination of thermal and stress analysis. Using empirical relationships between welding process parameters and weld bead size and shape is an appropriate way of defining the weldment geometry and the heat-source coordinates. With this approach, adequate agreement between predicted weld penetration, weld cooling times and heat-affected zone hardness has been made. Following the prediction of a thermal field a full thermo-elastic plastic model can be used to predict the conditions likely to cause bum-through. In this paper two significant research aspects of in-service welding have been addressed, as follows:1. A new mathematical description of a heat source to represent the commonin-service welding process, i.e. vertically up and vertically down manual metal arc welding with hydrogen controlled electrodes has been formed and has given good correlation with experiment and field welds.2. Preliminary bum-through modelling of in-service welding using non-linear thermal-stress numerical methods has given encouraging results.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 09:34:18