Buckling load analysis of grid stiffened composite cylinders

Kidane, Samuel; Li, Guoqiang; Helms, Jack E.; Pang, Su‐Seng; Woldesenbet, Eyassu

doi:10.1016/s1359-8368(02)00074-4

Cited by 162 publications

(58 citation statements)

References 1 publication

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“…First of all it is required to determine the equivalent stiffness parameters of the overall structure in order to calculate the vibration frequencies of a composite cylinder with inner stiffening structure. The analytical tool employed for this, so-called the smeared stiffener approach, uses a mathematical model to smear the stiffeners into an equivalent laminate and determine the equivalent stiffness of the laminate (for further details the reader is referred to [24,25]). …”

Section: Equivalent Stiffnessmentioning

confidence: 99%

“…Kidane et al [24,25] derived the buckling loads of a generally cross and horizontal grid-stiffened composite cylinder by developing a smeared method for determination of the equivalent stiffness parameters of a grid-stiffened composite cylindrical shell. The stiffness contribution of the stiffeners was superimposed with those of the shell to obtain 2 Advances in Acoustics and Vibration the equivalent stiffness parameters of the whole panel.…”

Section: Introductionmentioning

confidence: 99%

“…A smeared method is employed to superimpose the stiffness contribution of the stiffeners with those of shell in order to obtain the equivalent stiffness parameters of the whole panel [24,25]. As stated in [24,25], it is assumed that the transverse modulus of the unidirectional stiffeners is much lower than the longitudinal one and therefore the stiffeners are assumed to behave like a truss element and support the axial load only. A 3D finite element model is also built using ABAQUS software which takes into consideration the exact geometric configuration of the stiffeners and the shell.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of Vibrational Behavior of Grid-Stiffened Cylindrical Shells

Rahimi

Hemmatnezhad

Ansari

2014

Advances in Acoustics and Vibration

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A unified analytical approach is applied to investigate the vibrational behavior of grid-stiffened cylindrical shells with different boundary conditions. A smeared method is employed to superimpose the stiffness contribution of the stiffeners with those of shell in order to obtain the equivalent stiffness parameters of the whole panel. Theoretical formulation is established based on Sanders' thin shell theory. The modal forms are assumed to have the axial dependency in the form of Fourier series whose derivatives are legitimized using Stoke's transformation. A 3D finite element model is also built using ABAQUS software which takes into consideration the exact geometric configuration of the stiffeners and the shell. The achievements from the two types of analyses are compared with each other and good agreement has been obtained. The Influences of variations in shell geometrical parameters, boundary condition, and changes in the cross stiffeners angle on the natural frequencies are studied. The results obtained are novel and can be used as a benchmark for further studies. The simplicity and the capability of the present method are also discussed.

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Section: Equivalent Stiffnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prediction of Vibrational Behavior of Grid-Stiffened Cylindrical Shells

Rahimi

Hemmatnezhad

Ansari

2014

Advances in Acoustics and Vibration

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“…1, stiffness matrix of grid structures can be obtained as below [16]: Substituting the force and moment expressions for the stiffener network from Eq. 2, and the force and moment expressions for the shell from Eq.…”

Section: Equivalent Stiffness Matrix Of the Stiffener And Shellmentioning

confidence: 99%

Vibration Analysis of Grid-Stiffened Circular Cylindrical Shells with Full Free Edges

Jam¹,

Zadeh²,

Taghavian³

et al. 2011

Polish Maritime Research

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Free vibration of grid stiffened circular cylindrical shells is investigated based on the first Love's approximation theory using Galerkin method. Full free edges are considered for boundary conditions. An equivalent stiffness model (ESM) is used to develop the analytical solution of the grid stiffened circular cylindrical shell. The effect of helical stiffeners orientation and some of the geometric parameters of the structure have been shown. The accuracy of the analysis has been examined by comparing results withthose available in the literature and finite element approach.

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“…As a concept, smearing of stiffeners is not new, especially in stiffened metallic shells. For composites, several smeared stiffeners models were presented in the recent past [3][4][5][6][7][8][9][10][11] . Different criteria such as rib spacing, stiffness contribution (by force-moment analysis), equivalence of strain energy, etc.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Filament Wound Grid-stiffened Composite Cylindrical Structures

Buragohain

Ramachandran

2011

DSJ

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An integral account of design and analysis of grid-stiffened cylindrical structures is presented. For convenience, a two-phase approach is adopted. In the initial phase, with a view to arriving at a few initial possible optimal configurations, parametric analysis through smeared stiffeners approach is utilised. The ribs, in a filament wound grid-stiffened structure, introduce several additional design elements that result in many possible design configurations; in the initial phase, these design options are efficiently reduced to a few numbers. Finite element modelling is used in the final design and analysis. Rib material is distinct from normal unidirectional composites and this aspect is inherently accounted for in the modelling approaches considered here.

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Buckling load analysis of grid stiffened composite cylinders

Cited by 162 publications

References 1 publication

Prediction of Vibrational Behavior of Grid-Stiffened Cylindrical Shells

Prediction of Vibrational Behavior of Grid-Stiffened Cylindrical Shells

Vibration Analysis of Grid-Stiffened Circular Cylindrical Shells with Full Free Edges

Optimal Design of Filament Wound Grid-stiffened Composite Cylindrical Structures

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