Circumferential ring stiffeners are commonly used to improve the buckling strength of cylindrical shells. Under special circumstances, stiffener ring needs to be partially cut in order to avoid interference with vessel attachments or surrounding structures. No clear guideline is available in rule-based method to deal with such case. This paper investigates the extent of reduction in buckling capacity for a range of cylindrical shell geometries with stiffener rings having different cross sections and different extents of circumferential cut. Finite-element (FE)-based analysis as per ASME Section VIII, Division 2, Part 5 has been employed to determine the permissible external pressure in each of the cases. Effects of ring cross section and extent of circumferential cut of stiffening ring on the maximum permissible external pressure have been presented. A total of 63 combinations of shell-stiffening ring configurations of different L/D, D/t ratios, cross section shape, and extent of cut have been investigated. Geometrical parameters for these combinations under study are so chosen that normal working range in industries is covered. The results obtained provide guidelines to design shells with partially cut stiffening rings.
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February 2017
Research-Article
Investigation of Reduction in Buckling Capacity of Cylindrical Shells Under External Pressure Due to Partially Cut Ring Stiffeners
Snehankush Chikode,
Snehankush Chikode
Department of Mechanical Engineering,
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: snehankush.s.chikode@gmail.com
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: snehankush.s.chikode@gmail.com
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Nilesh Raykar
Nilesh Raykar
Department of Mechanical Engineering,
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: nilesh_raykar@spce.ac.in
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: nilesh_raykar@spce.ac.in
Search for other works by this author on:
Snehankush Chikode
Department of Mechanical Engineering,
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: snehankush.s.chikode@gmail.com
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: snehankush.s.chikode@gmail.com
Nilesh Raykar
Department of Mechanical Engineering,
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: nilesh_raykar@spce.ac.in
Sardar Patel College of Engineering,
University of Mumbai,
Mumbai 400058, India
e-mail: nilesh_raykar@spce.ac.in
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received August 31, 2015; final manuscript received May 9, 2016; published online August 5, 2016. Assoc. Editor: David L. Rudland.
J. Pressure Vessel Technol. Feb 2017, 139(1): 011202 (7 pages)
Published Online: August 5, 2016
Article history
Received:
August 31, 2015
Revised:
May 9, 2016
Citation
Chikode, S., and Raykar, N. (August 5, 2016). "Investigation of Reduction in Buckling Capacity of Cylindrical Shells Under External Pressure Due to Partially Cut Ring Stiffeners." ASME. J. Pressure Vessel Technol. February 2017; 139(1): 011202. https://doi.org/10.1115/1.4033653
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