Standard: WRC BUL 288
FRACTURE OF PIPELINES AND CYLINDERS CONTAINING A CIRCUMFERENTIAL CRACK
This standard is available for individual purchase.
IHS Standards Expert subscription, simplifies and expedites the process for finding and managing standards by giving you access to standards from over 370 standards developing organizations (SDOs).FEATURES & BENEFITS
- Maximize product development and R&D with direct access to over 1.6 million standards
- Discover new markets: Identify unmet needs and discover next-generation technologies
- Improve quality by leveraging consistent standards to meet customer and market requirements
- Minimize risk: Mitigate liability and better understand compliance regulations
- Boost efficiency: Speed up research, capture and reuse expertise
HOW TO SUBSCRIBE
This study is concerned with the problem of a pipe containing a part-through or a through circumferential crack. First, the stress intensity factors for an internal or an external circumferential surface crack in a pipe are obtained. The main objective here is to give the necessary theoretical information for the treatment of subcritical crack growth process. Next the problem of a through crack in the presence of large scale plastic deformations is considered. The crack opening displacement (COD) is used as the main parameter to analyze the fracture instability problem and to correlate the experimental results. In the analytical part of the study Reissner's shell theory and an elastic or elastic-plastic line spring model are used to formulate the problem. The experiments were performed on 20-inch diameter X60 line pipes. A 0.025-inch wide starter notch was introduced to the pipes which were then subjected to cyclic loading under four point bending. The limited data obtained from the fatigue tests give the expected result, namely that the crack propagation rate in pipes may be predicted from the baseline data obtained from simple specimens provided the stress intensity factors for pipes are calculated with sufficient accuracy. The ductile fracture results show that the technique based on the asymptotic behavior of COD may be quite useful in determining a conservative estimate of the fracture instability load.
|Organization:||Welding Research Council|
|Document Number:||wrc bul 288|
|Change Type:||NEW ADDITION|
|Most Recent Revision:||YES|