Localized and global, of eigenmode type, initial geometric imperfections were superimposed on perfect torispherical, ellipsoidal, and toroidal shells of circular and elliptical cross section. Reduction of the load-carrying capacity was then calculated numerically for various geometries and the yield point of material which was assumed to be mild steel. Results show that the buckling strength of torispheres and ellipsoids could be strongly affected by imperfections, but reduction of its magnitude was dependent on the choice of imperfection shape and, more importantly, on the imperfection’s location. Calculations carried out for closed toroids of circular cross section show that these shells are not sensitive to eigenmode-type imperfections, while toroids with elliptical cross sections are sensitive to eigen-imperfections.
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February 1999
Research Papers
On the Choice of Initial Geometric Imperfections in Externally Pressurized Shells
J. Błachut,
J. Błachut
Department of Engineering, The University of Liverpool, Liverpool, L69 3GH, UK
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O. R. Jaiswal
O. R. Jaiswal
Department of Engineering, The University of Liverpool, Liverpool, L69 3GH, UK
Search for other works by this author on:
J. Błachut
Department of Engineering, The University of Liverpool, Liverpool, L69 3GH, UK
O. R. Jaiswal
Department of Engineering, The University of Liverpool, Liverpool, L69 3GH, UK
J. Pressure Vessel Technol. Feb 1999, 121(1): 71-76 (6 pages)
Published Online: February 1, 1999
Article history
Received:
February 9, 1998
Revised:
July 7, 1998
Online:
February 11, 2008
Citation
Błachut, J., and Jaiswal, O. R. (February 1, 1999). "On the Choice of Initial Geometric Imperfections in Externally Pressurized Shells." ASME. J. Pressure Vessel Technol. February 1999; 121(1): 71–76. https://doi.org/10.1115/1.2883670
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