Evaluation on an Internal Surface Crack in a Compound Tube
In this paper stress intensity factors of a longitudinal semielliptical surface crack on the inner surface in a compound tube subjected to internal pressure are presented. Variations of modulus of ela...
In this paper stress intensity factors of a longitudinal semielliptical surface crack on the inner surface in a compound tube subjected to internal pressure are presented. Variations of modulus of ela...
Erratum: Retraction: “Estimates of Elastic Crack Opening Displacements of Slanted Through-Wall Cracks in Plate and Cylinder” [Journal of Pressure Vessel and Technology, 2009, 131(6), p. 061404]
Weight Minimization of Natural Gas Distribution Riser Systems
J. Pressure Vessel Technol. -- December 2009 -- Volume 131, Issue 6, 065001 (5 pages)
doi:10.1115/1.3148189
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This study investigates the optimal piping layout in the installation of residential natural gas riser piping systems subjected to daily temperature fluctuations. Specifically, it is desired to evaluate the optimal safe configuration for minimum weight requirements in the absence of flexible expansion joints between the riser pipe and the branches. Structural optimization is carried out using fully parametric finite element models employing the singular value decomposition algorithm. Thermally induced stresses are examined to identify the optimal layout. The results indicate that the optimal piping layout satisfies strength requirements and achieves significant weight reduction and hence cost saving compared with existing, rule-based configurations.
©2009 American Society of Mechanical Engineers
| History: | Received 3 June 2008; revised 26 December 2008; published 23 September 2009 | |
| doi: | http://dx.doi.org/10.1115/1.3148189 | |
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