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Ductile Fracture Arrest Assessment in a Gas Transmission Pipeline Using CTOA FREE

[+] Author Affiliations
G. Mannucci, G. Buzzichelli

Centro Sviluppo Materiali, Rome, Italy

P. Salvini

Cassino University, Italy

Robert Eiber

Robert J. Eiber, Consultant Inc.

Lorne Carlson

Alliance Pipeline Ltd.

Paper No. IPC2000-138, pp. V001T02A028; 6 pages
doi:10.1115/IPC2000-138
From:
  • 2000 3rd International Pipeline Conference
  • Volume 1: Codes, Standards and Regulations; Design and Constructions; Environmental; GIS/Database Development; Innovative Projects and Emerging Issues
  • Calgary, Alberta, Canada, October 1–5, 2000
  • Conference Sponsors: Pipeline Division
  • ISBN: 978-0-7918-4024-5
  • Copyright © 2000 by ASME

abstract

An analysis of the ductile fracture arrest in the first Alliance burst test has been conducted to examine the arrest of a ductile fracture in the presence of a rich gas, high stress level (80% SMYS), and high pressure (1740 psig, 12 MPa). The analysis used a three dimensional finite element analysis of a ductile fracture propagating in a buried gas transmission pipe to determine the crack tip opening angle (CTOA). The CTOA was calculated as a function of the fracture speed.

The critical CTOA was determined from Charpy V-notch and Drop Weight Tear Test specimens. The results indicate that in this instance the CTOA accurately assessed the fracture behavior observed in the burst test.

Copyright © 2000 by ASME
This article is only available in the PDF format.

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