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Title: Prediction of arrest pressure in pipe based on CTOA
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2363s
Date of Publication: 2015-12-01
Price: $25.00 US
Authors: by Mohamed Ben Amara, Prof. Guy Pluvinage, Prof. J Capelle, and Prof. Z Azari
Abstract: CRACK EXTENSION MODELLED by the finite- element method using the crack-tip- opening angle (CTOA) criterion coupled with the node-release technique is used to predict the crack velocity, the arrest pressure, and the crack length. This method is compared with different Two- Curve Methods: Batelle HLP, and HLP- Sumitomo, and is close to the latter for two pipe steels API5L X-65 and X-100. The infl uence of pipe thickness is studied through the concept of triaxial stress constraint: this method also confi rms that the arrest pressure decreases exponentially with the square root of the diameter.
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