On the Free Vibration of Stiffened Shallow Shells

Nayak, Amar Nath; Bandyopadhyay, Jayita

doi:10.1006/jsvi.2001.4159

Cited by 66 publications

(28 citation statements)

References 21 publications

(17 reference statements)

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“…As a result of a grid independence study, a grid size of 100x100 was found to model accurately the Natural Frequency of a Composite Laminated plate described in the corresponding results. The accuracy of the computer model was verified by comparing results from the present study with those obtained by Rastgaar [22], Ngo-Cong [27], Lam [5], Tkant [17] Experimental, Analytical and FEA results. figure 5.4 and in table 5.2 illustrates the natural frequencies of free vibration for different composite material like glass fiber, honeycomb and carbon-ud (carbon unidirectional) are to be shows that the maximum and minimum amount of total deformation.…”

Section: A Validationsupporting

confidence: 68%

Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis

Landge¹

2017

IJRASET

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I. INTRODUCTION A. What is a composite Material?A broad definition of composite is: Two or more chemically distinct materials that when combined has improved properties over individual materials. The composites may be either natural or synthetic. B. ApplicationThe glass-reinforced polyester has all the properties that make it ideal for this purpose and has become the standard material. Laminated plywood panels with thin layer of reinforced plastic are also widely used in truck trolleys. Various methods are used to produce them and the low cost, and the strength offered by the plywood that is attractive. They may not be as light as desired, but are found to be considerably more durable than conventional constructions, particularly under heavy duty conditions. There is also a growing market for products such as vans and trailers that are made from glass-reinforced plastic at competitive prices. Vehicles destined for consumer markets tend to be attractively designed, their appearance is different and the tools are easy. Mold reinforced plastic of the full size model of the piece are taken. The pattern can be made of wood, clay or plaster. The automotive sheet body is molded into molding molds paired with glass fiber or wick as reinforcements. Large and complex pieces can be produced and their reproduction can be made equally fast. Parts made using this technique generally have a uniform thickness, because the additional reinforcing fibers cannot be loaded easily or accurately. Composite molding materials are used when small rigid parts have to be made and are usually prepared by casting. The bulk molding compound is composed of polyester resin, glass fibers and filler. The strength is less than that obtained by other molding processes. The molding compounds may be prepared as continuous sheets. Due to the longer fibers and a high glass content, its strength is better than those made in the bulk molding method. Injection molding are used to some extent to produce materials that can be applied to structural materials. After the separate manufacture of parts by molding or other methods, the assembly of the vehicle body has to be made. Tools and accessories similar to those used in metal parts are used for drilling and drilling operations. The assembly of several parts is usually accomplished by adhesion, using resins that are catalyzed to cure at room temperature in a short time. A good bonding strength is achieved even without pressure, although fastening devices are required to locate the assembled parts correctly in relation to each other. High-build primers are used to give a high-gloss finish so that surface imperfections do not become obvious. Commercial aircraft applications are the most important uses of the compounds. Aircraft, unlike other vehicles, need to place greater emphasis on safety and weight. They are achieved using

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Section: A Validationsupporting

confidence: 68%

Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis

Landge¹

2017

IJRASET

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“…The vibration analysis of stiffened plates has been investigated by Barrette and Beslin [3] using hierarchical finite elements with a set of local trigonometric interpolation functions. Nayak and Bandyopadhyay [13] presented a finite element analysis for free vibration behaviour of doubly curved stiffened shallow shells. The eight-/nine-node doubly curved isoparametric thin shallow shell elements along with the three-node curved isoparametric beam element has been used in this study.…”

Section: Introductionmentioning

confidence: 99%

Vibration analysis of stiffened plates using finite element method

Hamedani

Khedmati

Azkat

2012

Lat. Am. j. solids struct.

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This paper presents the vibration analysis of stiffened plates, using both conventional and super finite element methods. Mindlin plate and Timoshenko beam theories are utilized so as to formulate the plate and stiffeners, respectively. Eccentricity of the stiffeners is considered and they are not limited to be placed on nodal lines. Therefore, any configuration of plate and stiffeners can be modeled. Numerical examples are proposed to study the accuracy and convergence characteristics of the super elements. Effects of various parameters such as the boundary conditions of the plate, along with orientation, eccentricity, dimensions and number of the stiffeners on free vibration characteristics of stiffened panels are studied.

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“…(21). Applying the principle of stationary action to functional A h , we obtain the following system equations for the shell under consideration…”

Section: Averaging Descriptionmentioning

confidence: 99%

“…The earlier models can be found in for example Hill [9], Hashin and Rosen [8], Budiansky [3]. The dynamic analysis of the stiffened shells can also be found in many papers, for example, see Mead and Bardell [16]) Mecitoglu and Dokmeci [17], Wang et al [25], Nayak and Bandyopadhyay [21], Solaroli et al [23]. The above-mentioned studies are concerned with analysis shells with low number of the stiffeners where distances between stiffeners are large compared to the width of stiffeners.…”

Section: Introductionmentioning

confidence: 97%

Dynamic modeling thin skeletonal shallow shells as 2D structures with nonuniform microstructures

Michalak

2012

Arch Appl Mech

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The subject of this consideration is a thin skeletonal elastic shallow shell with an orthogonal beamgrid microstructures. The important feature of the considered shells is that a dimension of the microstructure is of an order of the shell thickness. The formulation of 2D-macroscopic mathematical model of these shells, based on a tolerance averaging approximation (Woźniak et al., 2008), is the aim of the paper. During the modeling procedure, the shell under consideration is treated as a structure with a nonuniform microstructure. The general results of the contribution will be illustrated by the analysis of natural vibrations of a cylindrical thin skeletonal shallow shell.

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On the Free Vibration of Stiffened Shallow Shells

Cited by 66 publications

References 21 publications

Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis

Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis Free and forced vibration of a laminate structure with different material configuration & angle orientation by using finite element analysis

Vibration analysis of stiffened plates using finite element method

Dynamic modeling thin skeletonal shallow shells as 2D structures with nonuniform microstructures

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