Progressive Failure Analysis of Laminated Composite Cylindrical Shell Roofs

Sengupta, Jayashree; Ghosh, Arghya; Chakravorty, D.

doi:10.1007/s11668-015-9951-6

Cited by 13 publications

(10 citation statements)

References 17 publications

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“…In case of a solution in dimensional parameters, the sought-for functions have a different order, for example, the deflections W have the order 1 10  and , , , xy UV  have the order 23 10 -10 .…”

Section: Discussionmentioning

confidence: 99%

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Dimensionless Models of Deformation of Stiffened Shell Structures

2018

PNRPU MB

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Original Russian Text: Karpov V.V., Semenov A.A. Dimensionless models of deformation of stiffened shell structures. PNRPU Mechanics Bulletin, 2015, no. 3, pр. 74-94. This paper suggests a variant of dimensionless parameters for a wide range of shell structures. Dimensionless parameters have been used for shallow shells of rectangular planform for a long time. There is no universal form of dimensionless relations for shells of a general type, since the Lamé parameters are different for each type of shells, as far as their values and dimensions are concerned. Therefore, the work shows the dimensionless relations for strains, stresses, forces, moments and the functional of total potential energy of deformation. These relations consider geometrical nonlinearity, transverse shears, material orthotropy, as well as the introduction of ribs according to the structural anisotropy method with their shear and torsional rigidity taken into account. The authors show a further approach to solving strength and stability problems with respect to different types of shells in dimensionless parameters. Some methods intended to solve nonlinear strength problems are not quite correct, when dimensional parameters are used (for example, the methods based on the best parameter continuation method). In dimensionless parameters, all calculation are beyond doubt, as far as their correctness is concerned. The article also provides the calculations of some shell structures in dimensionless and dimensional parameters and shows their consistency. The introduction of dimensionless parameters in the course of calculation of such structures allows to obtain more comprehensive information on the stress and strain state of shells and detect strain features for a whole range of such shells. Also, this approach is suitable for optimizing the choice of structural parameters. The authors analyze some differences in critical loads that were obtained in the dimensionless and dimensional solutions of the problem. © PNRPU

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Section: Discussionmentioning

confidence: 99%

“…Shell structures are widely used in various industries, and the study of the process of their deformation is an important task [1][2][3][4]. During operation, the shells may be subjected to various loads, and therefore it is necessary to analyze their strength, stability and non-linear vibrations.…”

Section: Introductionmentioning

confidence: 99%

Dimensionless Models of Deformation of Stiffened Shell Structures

2018

PNRPU MB

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“…These authors studied free vibration properties of conoids using finite element. Sengupta et al [13] studied the progressive failure of cylindrical shell roof. Bakshi and Chakravorty [14] reported the geometrically nonlinear analysis of conoidal shell.…”

Section: Introductionmentioning

confidence: 99%

Impact Response of Laminated Composite Simply-Supported Stiffened Conoidal Shell With Cut-Out

Sharma,

Bhattacharjee,

Jana

et al. 2024

Advanced Materials in Civil Engineering

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Laminated composite has become popular in the weight sensitive branches of engineering. In recent times it is widely used in civil engineering as roofing entity. It has advantages like low specific weight, high specific strength, weathering resistance and can be tailored as per the user. Despite these advantages low transverse shear capacity under impact loading compelled researchers to conduct further research for its successful implementation industrial sectors. Impact, which is likely to occur in cyclone prone zones and aircraft bases where wind borne debris causes the same. Impact causes delamination, cracks in epoxy medium or tearing of fibers which remains suppressed under lamina and causes eventual failures. Conoidal shells used as roofing entity is often provided with cut-outs for accommodation of utilities. Concentration of stresses in discontinuous edges may cause unacceptable deformation and stress concentration. Stiffeners become unavoidable in certain cases to lower the stress generated around cut-outs. Incorporation of proper contact law is important for impact analysis. Literature survey reveals that conoidal shell is an interesting roofing entity and needs to be studied for its confident application. Present study is an effort to investigate the impact behaviour of such conoidal shell roof.

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“…В исследованиях, посвященных прочности материалов и конструкций, достаточно ча-сто встречаются критерий максимальных напряжений [26,38], критерий Гольденблата -Копнова [12,13], критерий Цая-Ву [26,28,31,40], критерий Хоффмана [17,26,38], критерий Хашина [25, 27,28,30].…”

Section: Introductionunclassified

Analysis of the strength of shell structures, made from modern materials, according to various strength criteria

Semenov¹

2018

DREAM

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The paper analyzes the possibility of applying five different strength criteria (maximum stress criterion, Mises-Hill, Pisarenko-Lebedev, Fisher, Goldenblat-Kopnov) to calculating the strength of orthotropic shell structures. We consider shallow shells of double curvature, square in plan, panels of cylindrical and conical shells. A geometrically nonlinear mathematical model of their deformation, taking into account transverse shearing, is used. For calculations, the characteristics of modern orthotropic materials are used, such as fiberglass and CFRP. An increase in the areas of the failure of strength conditions with increasing load is shown.

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Progressive Failure Analysis of Laminated Composite Cylindrical Shell Roofs

Cited by 13 publications

References 17 publications

Dimensionless Models of Deformation of Stiffened Shell Structures

Dimensionless Models of Deformation of Stiffened Shell Structures

Impact Response of Laminated Composite Simply-Supported Stiffened Conoidal Shell With Cut-Out

Analysis of the strength of shell structures, made from modern materials, according to various strength criteria

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