Imperfection sensitivity of an orthotropic spherical shell under external pressure

Öry, Huba; Reimerdes, Hans-Günther; Schmid, Thomas; Rittweger, Andreas; García, Javier Espinosa

doi:10.1016/s0020-7462(01)00091-9

Cited by 22 publications

(3 citation statements)

References 6 publications

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“…18(b) was used to assemble the segments and then weld them. The shells investigated were expected to be sensitive to deviations from the perfect shape (see, for example, Refs [129][130][131][132][133][134][135]). It was, therefore, decided to carefully monitor shell's shape prior to testing, i.e., after pressing, cutting, and welding.…”

Section: Combinedmentioning

confidence: 99%

Experimental Perspective on the Buckling of Pressure Vessel Components

Błachut

2013

Applied Mechanics Reviews

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This review aims to complement a milestone monograph by Singer et al. (2002, Buckling Experiments-Experimental Methods in Buckling of Thin-Walled Structures, Wiley, New York). Practical aspects of load bearing capacity are discussed under the general umbrella of "buckling." Plastic loads and burst pressures are included in addition to bifurcation and snap-through/collapse. The review concentrates on single and combined static stability of conical shells, cylinders, and their bowed out counterpart (axial compression and/or external pressure). Closed toroidal shells and domed ends onto pressure vessels subjected to internal and/or external pressures are also discussed. Domed ends include: torispheres, toricones, spherical caps, hemispheres, and ellipsoids. Most experiments have been carried in metals (mild steel, stainless steel, aluminum); however, details about hybrids (copper-steel-copper) and shells manufactured from carbon/glass fibers are included in the review. The existing concerns about geometric imperfections, uneven wall thickness, and influence of boundary conditions feature in reviewed research. They are supplemented by topics like imperfections in axial length of cylinders, imperfect load application, or erosion of the wall thickness. The latter topic tends to be more and more relevant due to ageing of vessels. While most experimentation has taken place on laboratory models, a small number of tests on full-scale models are also referenced.

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Section: Combinedmentioning

confidence: 99%

Experimental Perspective on the Buckling of Pressure Vessel Components

Błachut

2013

Applied Mechanics Reviews

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“…The modified iteration method It is very difficult to solve equation (2). Ye Kaiyuan proposed the modified iteration method to solve this problem in1965 [6]．Then Liu Renhuai solved the stability of a sphere shell with a hole on the top by this method, he applied this method in the nonlinear vibration of corrugated plate successfully [7].…”

Section: Advances In Fracture and Behaviormentioning

confidence: 99%

“…There are several reasons that result in the instability failure, for instance, the original geometry imperfection during manufacture and fixing or local corrosion and residual stress due to welding. Some studies has been conducted on the influence of original geometry imperfection to the stability of shells [2,3], and some theoretical formulas have been proposed and applied in engineering shell structures. Some scholar mentioned the imperfection on the top of the shallow spherical shell is more dangerous.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Local Thinned Shallow Spherical Roof of Oil Storage Tank

Yang

Liu

Li³

et al. 2008

AMR

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The analytical evaluation and finite element methods are used to analyze the critical stability of the shallow spherical roof of oil storage tank with an axial symmetrical corrosion region. At first, the nonlinear finite element method is adopted to calculate the global critical load of the storage tank roof, and the local corrosion region is equivalent to a circular corrosion pit with uniform depth. The results show that the tank wall and inner pressure of the stored oil have slight effects on the stability of the roof. To build the formula of local critical load of the tank roof, the circular corrosion pit is separated from the whole roof and treated as a shallow spherical shell which is elastically supported on the rest part of the roof. The equivalent support stiffness is obtained by the deformation compatibility at the edge of the corrosion pit. The resulted nonlinear stability equation is solved with a modified iteration method to determine the local critical load. The local critical load for an in-service corroded oil tank roof is analyzed by the proposed approach and the results are compared with those calculated by the conventional nonlinear finite element method with good agreement and the geometrical parameter of the corrosion region corresponding to the minimal critical load is 9.5.

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Stability of composite shell–type structures

Degenhardt

2017

Stability and Vibrations of Thin Walled Composite Structures

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Imperfection sensitivity of an orthotropic spherical shell under external pressure

Cited by 22 publications

References 6 publications

Experimental Perspective on the Buckling of Pressure Vessel Components

Experimental Perspective on the Buckling of Pressure Vessel Components

Stability Analysis of Local Thinned Shallow Spherical Roof of Oil Storage Tank

Stability of composite shell–type structures

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