PREDICTION OF THE INFLUENCE OF GEOMETRICAL IMPERFECTION TO LOAD CARRYING CAPACITY OF CONICAL SHELLS UNDER AXIAL LOADING

In the present study, the effect of geometrical imperfections on the load carrying capacity of conical shells under axial loading was investigated. In accordance with this purpose, limit loads for both ideal and imperfect conical shells were utilized via a series of numerical analysis. Numerical analyses were made for radially constrained conical shells at various shell thicknesses and semi-vertex angles. Thus, it is aimed to evaluate the effect of the geometric imperfections on shells with various geometrical parameters. In all numerical simulations, nonlinear geometry influences were included (GNIA – Geometrically nonlinear analysis with imperfection included). It is found that with increasing semi-vertex angle, the sensitivity of the structures to imperfection also reduces. Shell thickness ??ℎ??? has almost no effect on the sensitivity to imperfection.

Keywords:

Conical shell elastic buckling, axial compression, imperfection,

PDF

___

[1] Cooper, PA, Dexter, CB. “Buckling of the conical shell with local imperfections”. NASA Technical Memorandum. NASA TM X2991, NASA Langley, Va: USA; p. 1–21, (1974).
[2] Wunderlich, W., and U. Albertin. “The influence of boundary conditions on the load carrying behavior and the imperfection sensitivity of conical shells.” Carrying Capacity of Steel Shell Structures: 98-105, (1996).
[3] Zielnica, J. “Imperfection sensitivity and stability of an elastic-plastic conical shell under axisymmetrical load.” Archive of Applied Mechanics 72.6-7: 395-417, (2002).
[4] Goldfeld, Yiska, Izhak Sheinman, and Menahem Baruch. “Imperfection sensitivity of conical shells.” AIAA journal 41.3: 517-524, (2003).
[5] Jabareen, Mahmood, and Izhak Sheinman. “Postbuckling analysis of geometrically imperfect conical shells.” Journal of engineering mechanics 132.12: 1326-1334, (2006).
[6] Goldfeld, Yiska. “Imperfection sensitivity of laminated conical shells.” International journal of solids and structures 44.3: 1221-1241, (2007).
[7] Jabareen, Mahmood, and Izhak Sheinman. “Stability of imperfect stiffened conical shells.” International Journal of Solids and Structures 46.10: 2111-2125, (2009).
[8] Ifayefunmi, O., and J. Błachut. “The Effect of Shape, Thickness and Boundary Imperfections on Plastic Buckling of Cones.” ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, (2011).
[9] Błachut, J. “Combined stability of geometrically imperfect conical shells.” Thin-Walled Structures 67: 121-128, (2013).
[10] ECCS TC8 TWG 8.4 “Buckling of Steel Shells”, European Design Recommendations, 5th Edition, Published by ECCS, ISBN: 92-9147-000-92, (2008).
[11] EN 1993-1-6 Eurocode 3: “Design of Steel Structures - Part 1-6: Strength and Stability of Shell Structures”, Published by The European Union, ISBN: 978 0 580 50669 7, (2007).
[12] Marios K. Chryssanthopoulos, C. Poggi, A. Spagnoli, “Buckling design of conical shells based on validated numerical models”, Thin-Walled Structures, 31, 257–270, (1998).
[13] COSMOS/M User’s Guide. Structural Research and Analysis Corporation. (2001).
[14] Simulia, D. S. Abaqus 6.13 Analysis User’s Guide. Dassault Systems, Providence, RI (2013).

Sigma Mühendislik ve Fen Bilimleri Dergisi-Cover

ISSN: 1304-7191
Yayın Aralığı: Yılda 4 Sayı
Yayıncı: Yıldız Teknik Üniversitesi

Arşiv