The Behavior of Structures Composed of Composite Materials

Vinson, J. R.; Sierakowski, Robert L.; Bert, Charles W.

doi:10.1115/1.3172985

Cited by 177 publications

(229 citation statements)

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“…Different methods have been used in this case, such as the Boundary Integral Equation Method [5], the Transfer Matrix Method [16], the Differential Quadrature Method [29], the Green Function [30], or the Flexibility Influence Function Method (FIFM) [31]. The FIFM is a technique that does not require the calculation of the natural frequencies or vibration modes of the beam [32]. This method is especially useful for solving hyper static problems in dynamic conditions because the influence of the boundary conditions in this method is restricted to the solution of equations for static conditions.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Fiber Orientation and Position of Circular Hole on Torsional Natural Frequency of Laminated Composite Beam

Padhi¹

2018

IJRASET

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The composite materials are well known by their excellent combination of high structural stiffness and low weight. The main feature of these anisotropic materials is their ability to be tailored for specific applications by optimizing design parameters such as stacking sequence, ply orientation and performance targets. Finding free torsional vibrations characteristics of laminated composite beams is one of the bases for designing and modeling of industrial products. With these requirements, this work considers the free torsional vibrations for laminated composite beams of doubly symmetrical cross sections. The torsional vibrations of the laminated beams are analyzed analytically based on the classical lamination theory, and accounts for the coupling of flexural and torsional modes due to fiber orientation of the laminated beams are neglected. Also, the torsional vibrations of the laminated beams analyzed by shear deformation theory in which the shear deformation effects are considered. Numerical analysis has been carried out using finite element method (FEM). The finite element software package ANSYS 13.0 is used to perform the numerical analyses using an eight-node layered shell element to describe the torsional vibration of the laminated beams. The rotary inertia and shear deformation effects of the element are taken. The influence of fiber directions and stacking sequences of laminates on torsional natural frequencies were investigated. Also, the effects of boundary conditions are demonstrated. Numerical results, obtained by the ANSYS 13.0, classical lamination theory, and shear deformation theory are presented to highlight the effects of fibers orientation and layers stacking sequence on torsional frequencies of the beams. The results obtained by ANSYS are compared against the classical lamination theory, as well as shear deformation theory.

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Section: Literature Reviewmentioning

confidence: 99%

Effect of Fiber Orientation and Position of Circular Hole on Torsional Natural Frequency of Laminated Composite Beam

Padhi¹

2018

IJRASET

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“…Therefore, the laminate plate theory [26,27] can be used to analyze its bending response. According to the es perpendicular to the surface of th in straight and perpendicular to the deform functional forms of the displacements for the la- …”

Section: Laminate Plate Theorymentioning

confidence: 99%

“…As given in [26], for the laminate plate simply supporte on all four edges, the solutions for the flexural vibration ma …”

Section: Dynamic Analysis Of Laminate Plate Including Mationmentioning

confidence: 99%

Bending and dynamic analyses of sandwich panels considering the size effect of sandwich core

Qiu

Zhang

Zhu

2009

Int. J. Simul. Multidisci. Des. Optim.

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-In this paper, the bending and dynamic responses of sandwich panels with the size variation of different sandwich cores and the homogenized cores are analyzed numerically, including the hexagonal and rectangular cores, the square and rhombic cores and the circle and X-shape corrugated cores. In dependence on the ratio of the span dimensions to thickness, the laminate plate theory is also adopted for the static and dynamic analysis of sandwich panels with the homogenized cores. The computational results demonstrate the influencing rule of size variation of unit cells in the sandwich core on the bending and dynamic response of sandwich panels.

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“…Another potentially useful method for delaying concrete cover separation is the use of FRP strips that are tapered at the ends. In the design of adhesive bond repairs for laminated composite structures, tapering has been widely applied to avoid premature failure by reducing the adhesive peel stresses [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Strengthening efficiency of taper ended FRP strips bonded to RC beams

Gao

Kim

Leung

2006

Composites Science and Technology

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Abstract:External bonding of fiber reinforced plastic (FRP) strips to reinforced concrete (RC) beams has been widely accepted as an effective method for strengthening and rehabilitation of aging civil structures. The FRP strips improve significantly the ultimate flexural strength of RC beams. This paper reports the effectiveness of taper end FRP design in further enhancing the structural performance of strengthened RC beams. The relative performance of taper distance was specifically evaluated in an effort to optimize the FRP strip end geometry for given RC beam dimensions. With rehabilitation of damaged and/or aging structures in mind, precracked RC beams were also studied. The four point bending experiment indicated that the tapered FRP strip end design augmented significantly the ultimate load and mitigated the reduction in beam deflection corresponding to the ultimate load, compared to the beams bonded with constant thickness FRP strips. There was negligible difference in flexural performance between the virgin and precracked RC beams after they were bonded with taper ended FRP strips, indicating that the tapered FRP design concept can be applied to both undamaged and aging/damaged structures.

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The Behavior of Structures Composed of Composite Materials

Cited by 177 publications

References 0 publications

Effect of Fiber Orientation and Position of Circular Hole on Torsional Natural Frequency of Laminated Composite Beam

Effect of Fiber Orientation and Position of Circular Hole on Torsional Natural Frequency of Laminated Composite Beam

Bending and dynamic analyses of sandwich panels considering the size effect of sandwich core

Strengthening efficiency of taper ended FRP strips bonded to RC beams

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