Large Amplitude Forced Vibration Response of Laminated Composite Rectangular Plates by a Finite Element Method

Wentz, Kenneth R.; Mei, Chuh; Chiang, C. K.

doi:10.1007/978-94-009-4952-2_50

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…Gary et al [13] studied large-amplitude vibrations and random responses of symmetrically laminated rectangular plates. Wentz et al [35] studied large-amplitude forced vibrations of laminated composite rectangular plates by a finite-element method. Eslami and Kandil [12] used the method of multiple scales to study the nonlinear response of an orthotropic panel to a harmonic excitation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear combination resonances in cantilever composite plates

Nayfeh

1996

Nonlinear Dyn

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We experimentally investigated nonlinear combination resonances in two graphite-epoxy cantilever plates having the configurations (90/30/-30/-30/30/90L and (-75/75/75/-75/75/-75)~. As a first step, we compared the natural frequencies and modes shapes obtained from the finite-element and experimental-modal analyses. The largest difference in the obtained frequencies for both plates was 6%. Then, we transversely excited the plates and obtained force-response and frequency-response curves, which were used to characterize the plate dynamics. We acquired time-domain data for specific input conditions using an A/D card and used them to generate time traces, power spectra, pseudo-state portraits, and Poincarg maps. The data were obtained with an accelerometer monitoring the excitation and a laser vibrometer monitoring the plate response. We observed the external combination resonance f~ ~ a)2 -t-037 in the quasi-isotropic plate and the external combination resonance f~ ~ (1/2) (a~2 + cJs) and the internal combination resonance f~ ~ w8 ~ (1/2)(co2 + w13) in the +75 plate, where the wi are the natural frequencies of the plate and fZ is the excitation frequency. The results show that a low-amplitude high-frequency excitation can produce a high-amplitude low-frequency motion.

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Section: Introductionmentioning

confidence: 99%

Nonlinear combination resonances in cantilever composite plates

Nayfeh

1996

Nonlinear Dyn

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“…al 1985 Present a finite element formulation for examining the large amplitude, steady-state, forced vibration response of arbitrarily laminated composite rectangular thin plates. [1] To analysis nonlinear forced vibration laminated composite rectangular plate, the nonlinear stiffness and harmonic force matrices has been developed and parametric variation in form of laminate angles and number of plies, in-plane boundary conditions has also been presented. The FE results are compared with available approximate continuum solutions.…”

Section: Literature Surveymentioning

confidence: 99%

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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“…(25) into Eq. (21) and equating coefficients of like powers of e yields The general solution to Eq. (54) can be expressed as…”

Section: Case Of 12 Near Onmentioning

confidence: 99%

“…This method also is used to solve the nonlinear forced vibration of symmetrically laminated rectangular plates by Mei and Chiang. 20 Later, Wentz et al 21 presented the forced vibration response of a generally laminated rectangular plate.…”

Section: Introductionmentioning

confidence: 99%

Two-mode nonlinear vibration of orthotropic plates using method of multiple scales

Eslami

Kandil

1989

AIAA Journal

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Nonlinear forced oscillation of a rectangular orthotropic plate subjected to uniform harmonic excitation is solved using the method of multiple scales. The governing equations are based on the von Karman type geometrical nonlinearity, and the effect of damping is included. The general multimode solution is developed for simply supported boundary conditions, and the solution is specialized for two-symmetric modes analysis. The primary resonances and the subharmonic and superharmonic secondary resonances are studied in detail.

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Large Amplitude Forced Vibration Response of Laminated Composite Rectangular Plates by a Finite Element Method

Cited by 5 publications

References 9 publications

Nonlinear combination resonances in cantilever composite plates

Nonlinear combination resonances in cantilever composite plates

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

Two-mode nonlinear vibration of orthotropic plates using method of multiple scales

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