Plastic buckling of ring-stiffened conical shells under external hydrostatic pressure

Ross, Carl T.F.; Little, Andrew; Adeniyi, Kehinde A.

doi:10.1016/j.oceaneng.2004.05.007

Cited by 28 publications

(15 citation statements)

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“…10 in Ref. [88]). Strain gauges on the inner surface, primarily used to indicate the number of lobes in the failure mode, recorded large plastic strains just prior to buckling.…”

Section: Externally Pressurized Conesmentioning

confidence: 90%

“…In this case, the ratio of p exp tl /p numerical varied between 0.62 and 0.80. In a separate research, with scattered results in Refs [88][89][90], a series of 15 mild steel cones reinforced by external rings have been tested under quasi-static external hydrostatic pressure. It is reported that the failures were sudden with a loud bang accompanying failure.…”

Section: Externally Pressurized Conesmentioning

confidence: 99%

See 1 more Smart Citation

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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“…10 in Ref. [88]). Strain gauges on the inner surface, primarily used to indicate the number of lobes in the failure mode, recorded large plastic strains just prior to buckling.…”

Section: Externally Pressurized Conesmentioning

confidence: 90%

Section: Externally Pressurized Conesmentioning

confidence: 99%

Experimental Perspective on the Buckling of Pressure Vessel Components

Błachut

2013

Applied Mechanics Reviews

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“…Refs. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], and 2) "closed-ended" chambers, e.g. Refs.…”

Section: Conventional External Pressure Testing Methodsmentioning

confidence: 99%

A Review of External Pressure Testing Techniques for Shells including a Novel Volume-Control Method

MacKay

Keulen

2009

Exp Mech

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A review of conventional testing methods for applying external hydrostatic pressure to buckling-critical shells is presented. A new "volume-control" pressure testing method, aimed at preventing catastrophic specimen failures and improving control of specimen deformation near the critical load, is also introduced. The implementation of conventional and volume-control systems in an experimental program involving the destructive pressure testing of ring-stiffened cylinders is described. The volume control method was found to improve control of the specimen deformations, especially near the critical load, and catastrophic failures observed while using a conventional setup were avoided. The quasi-static tracking of postcollapse load-deformation relationships for snap-through buckling behaviour was possible while using a volumecontrol system, but precise control of dynamic shell deformations during buckling was not achieved for specimens failing with large buckling lobes. Expressions for estimating the available control over specimen deformations for pressure testing systems are presented.

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“…14 and 15 were obtained for the results of 12 ring-stiffened cones, tested to destruction. Cones 1-6 [1,8,11] and Cones 10-12 [12] were carried out elsewhere, and Cones 7-9 are reported in the present text. The results for these vessels are shown in Tables 5 and 6 where P cr is the theoretical elastic buckling pressure (Kendrick Part 1 or Part 3); P exp the experimental buckling pressure; l 0 the thinness ratio (see above calculation); P cr /P exp the plastic knockdown factor ¼ PKD.…”

Section: Conementioning

confidence: 99%