Fracture mechanics analysis of a fire tube boiler

✍ Scribed by Maher Y.A. Younan; Sayed M. Metwalli; Ahmed A. Ei-Zoghby

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 877 KB
• Volume: 17
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(83)90084-x

✦ Synopsis

This paper is involved with the fracture mechanics study of the tire tube and the outer shell of a boiler. A simplistic approach for determining the stress-intensity to load relations is presented. The results of this approach agreed well with those obtained from a special fracture mechanics finite element program. This approach may well be used in any thin walled cracked problem. The tire tube has been treated as one of the following problems:

(1) A straight elliptical externally pressurized tube with a longitudinal crack.

(2) A corrugated elliptical externally pressurized tube with longitudinal crack.

(3) 'A perfectly round externally pressurized corrugated tube with a circumferential crack. The allowable working pressure has been obtained for different crack to thickness ratios and ditTerent out of roundness.

The external shell of the boiler has been checked using the leak before burst criterion.