Elastic Working Stresses in High-pressure Vessels with an Offset Oblique Cross Bore

Elastic Working Stresses in High-pressure Vessels with an Offset Oblique Cross Bore
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© 2023 by IJETT Journal
Volume-71 Issue-12
Year of Publication : 2023
Author : PK Nziu
DOI : 10.14445/22315381/IJETT-V71I12P227

How to Cite?

PK Nziu , "Elastic Working Stresses in High-pressure Vessels with an Offset Oblique Cross Bore," International Journal of Engineering Trends and Technology, vol. 71, no. 12, pp. 292-298, 2023. Crossref, https://doi.org/10.14445/22315381/IJETT-V71I12P227

Abstract
The purpose of this study was to investigate the effects of oblique offset cross bore on elastic working stress in highpressure vessels. A total of 140 different axisymmetric models were created and analysed in this work using finite element analysis commercial software Abaqus. Results from most of the cylinders studied revealed that the lowest working stresses predicted by both Tresca’s and Von Mises’s elastic failure theories occurred at an oblique angle of 00 , with the exception of thickness ratios of 1.4, 1.5 and 2.0, which had their minima at 150 . Moreover, the highest magnitudes of working stresses were noted at an inclination angle of 600 for all thickness ratios studied, apart from K = 2.0, which occurred at 450 . Finally, it was established that a pressure carrying capacity ranging from 173.7% to 559.8% and 161.9% to 531.5% for Tresca’s and Von Mises working stresses, respectively, can be reclaimed whenever the cross bore is positioned appropriately at the region of lowest working stresses.

Keywords
High-pressure vessels, Oblique angle, Offset location ratio, Working stresses.

References
[1] Naftali Kiplagat, “Optimal Geometric Configuration of a Cross Bore in Thick Compound Cylinders,” Vaal University of Technology, pp. 1-133, 2021.
[Google Scholar] [Publisher Link]
[2] John F. Harvey, Theory and Design of Pressure Vessels, Van Nostrand Reinhold Company, pp. 1-623, 1985.
[Google Scholar] [Publisher Link]
[3] Hugh Ford, and John Malcolm Alexander, Advanced Mechanics of Materials, 2nd ed., Halsted Press, 1977.
[Google Scholar] [Publisher Link]
[4] L.M Masu, and G. Craggs, “Fatigue Strength of Thick-Walled Cylinders Containing Cross Bores with Blending Features,” Proceedings of the Institution of Mechanical Engineers, vol. 206, no. 5, pp. 299-309, 1992.
[CrossRef] [Google Scholar] [Publisher Link]
[5] P. Makulsawatudom, D. Mackenzie, and R. Hamilton, “Stress Concentration at Crossholes in Thick Cylindrical Vessels,” The Journal of Strain Analysis of Engineering Design, vol. 39, no. 5, pp. 471-481, 2004.
[CrossRef] [Google Scholar] [Publisher Link]
[6] Masu, and M. Leonard, “The Effect of Cross Bore Geometry on the Strength of Pressure Vessels,” University of Nairobi, 1989.
[Google Scholar] [Publisher Link]
[7] Kihiu, and John Muniu, “Numerical Stress Characterization in Cross Bored Thick Walled Cylinders under Internal Pressure,” University of Nairobi, 1989.
[Google Scholar] [Publisher Link]
[8] Tugrul Comlekci et al., “Elastic Stress Concentration at Radial Crossholes in Pressurized Thick Cylinders,” The Journal of Strain Analysis for Engineering Design, vol. 42, no. 6, 2007.
[CrossRef] [Google Scholar] [Publisher Link]
[9] J.M. Kihiu, and C.A. Adenya, “Stress Concentration Factors in Thick-Walled Cylinders with Elliptical Cross Bore,” Jomo Kenyatta University of Agriculture and Technology, 2010.
[Google Scholar] [Publisher Link]
[10] Robert E. Little, and Bagci Cemil, “Stress Analyses of Pressurized Cylinders,” Engineering Research Bulletin Publication, vol. 145, pp. 1-98, 1965.
[Google Scholar] [Publisher Link]
[11] B.N. Cole, “Strategy for Cross-Bores in High-Pressure Vessels Containers,” Journal Mechanical Engineering Science, vol. 11, no. 2, 1969.
[CrossRef] [Google Scholar] [Publisher Link]
[12] Y.F. Cheng, “Stress Concentration around Inclined Holes in Pressurized Thick-Walled Cylinders,” Defense Technical Information Center, 1978.
[Google Scholar] [Publisher Link]
[13] Gérard C. Nihous, Christopher K. Kinoshita, and Stephen M. Masutani, “Stress Concentration Factors for Oblique Holes in Pressurized Thick Walled Cylinders,” Journal of Pressure Vessel Technology, vol. 130, no. 2, pp. 1-7, 2008.
[CrossRef] [Google Scholar] [Publisher Link]