Free vibration analysis of cantilever open-hole composite plates

Aidi, Bilel; Shaat, Mohamed; Abdelkefi, Abdessattar; Case, Scott W.

doi:10.1007/s11012-017-0626-0

Cited by 20 publications

(4 citation statements)

References 25 publications

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“…Over the last few decades, Fiber Reinforced Polymer (FRP) has been widely acknowledged in aerospace, 16 marine, 17 transport, 18 building and construction, 19 and rehabilitation, 20 in which the use of multi-material designed components and the assembly of the structural component is unavoidable. 21 Moreover, the assembly of dissimilar materials by conventional thermal joining process is restricted due to metallurgical incompatibilities. 22 Holes are made to the structural components to accommodate bolts and rivets in order to assemble the parts.…”

Section: Assembly and Joining Of Composite Componentmentioning

confidence: 99%

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Gupta

Pal

Ray

2023

J of Applied Polymer Sci

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Aerospace and aircraft companies follow a pyramidal structure of testing, ranging from specimen tests to full-scale structure tests, for aircraft structural design. At the base level, open hole strength evaluation is one of the qualification procedures for composite components. The holes are made in the structural components to accommodate bolts and rivets in order to assemble the parts into a single unit. Holes in the component are also used to fulfill functional requirements, such as the passage of wire bundles. FRP components are sensitive to these holes/cutouts as substantial decrement in the strength is observed in several experiments. The degradation in the strength of the component is due to stress concentration around the hole. This review aims to comprehend the effect of the hole on the mechanical properties of FRP laminates; the emphasis is mainly on CFRP laminates and experimental results. An overview of tensile, compressive, flexural and post buckling properties of laminates with the hole is presented to aid in the optimal design of the component. Finally, the failure mechanism during loading is discussed and described through a graphical presentation.

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Section: Assembly and Joining Of Composite Componentmentioning

confidence: 99%

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Gupta

Pal

Ray

2023

J of Applied Polymer Sci

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“…Using the Galerkin discretization [ 41 ] and equalizing the mean values of the cantilever flexural work and kinetic energy per oscillation cycle, the resonance frequencies of the cantilever can be obtained as:

\begin{equation}{\omega }_n = \sqrt {\frac{{\mathop \smallint \nolimits_0^L {E}_c{I}_c\ddot{\varphi }_n^2dx + \mathop \smallint \nolimits_{{L}_1}^{{L}_2} {E}_a{I}_a\ddot{\varphi }_n^2dx}}{{\mathop \smallint \nolimits_0^L {\rho }_c{b}_c{h}_c{\mathrm{\varphi }}_n^2dx + \mathop \smallint \nolimits_{{L}_1}^{{L}_2} {\rho }_a{b}_a{h}_a{\mathrm{\varphi }}_n^2dx}}} \ \end{equation}

where L 1 and L 2 are represented in Figure 1.…”

Section: Modelmentioning

confidence: 99%

Tailored Microcantilever Optimization for Multifrequency Force Microscopy

Bhattacharya,

Lionadi,

Stevenson

et al. 2023

Advanced Science

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Microcantilevers are at the heart of atomic force microscopy (AFM) and play a significant role in AFM‐based techniques. Recent advancements in multifrequency AFM require the simultaneous excitation and detection of multiple eigenfrequencies of microcantilevers to assess more data channels to quantify the material properties. However, to achieve higher spatiotemporal resolution there is a need to optimize the structure of microcantilevers. In this study, the architecture of the cantilever with gold nanoparticles using a dip‐coating method is modified, aiming to tune the higher eigenmodes of the microcantilever as integer multiples of its fundamental frequency. Through the theoretical methodology and simulative model, that integer harmonics improve the coupling in multifrequency AFM measurements is demonstrated, leading to enhanced image quality and resolution. Furthermore, via the combined theoretical‐experimental approach, the interplay between induced mass and stiffness change of the modified cantilever depending on the attached particle location, size, mass, and geometry is found. To validate the results of this predictive model, tapping‐mode AFM is utilized and bimodal Amplitude Modulation AFM techniques to examine and quantify the impact of tuning higher‐order eigenmodes on the imaging quality of a polystyrene‐polymethylmethacrylate (PS‐PMMA) block co‐polymer assembly deposited on a glass slide and Highly Ordered Pyrolytic Graphite (HOPG).

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“…They can have different shapes, e.g., square, circular, oval, or triangular shapes. However, their existence can have a major impact on the vibratory [1][2][3], static [4][5][6], and buckling [7][8][9] behavior of structures.…”

Section: Introductionmentioning

confidence: 99%

Finite Element and Neural Network Based Predictive Model to Determine Natural Frequency of Laminated Composite Plates with Eccentric Cutouts under Free Vibration

Seba

Kebdani

2022

Adv. technol. innov.

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This research proposes a predictive model to identify changes in the mechanical and geometrical properties of composite plates with eccentric cutouts based on natural frequency. Finite elements (FE) and neural networks are used to develop the model based on machine learning. First, the numerical analysis of free vibration is performed by the FE model on the laminated composite plates with a stacking sequence [0/90]2s under a clamped-free (CFFF) boundary condition. The outputs of the FE model (520 configurations) are then utilized to train the artificial neural network (ANN) model through the Levenberg-Marquardt method, and the developed ANN model is then used to evaluate the influence of various parameters on the natural frequency. The results show that the changes in the mechanical and geometrical properties of composite plates have impacts on the natural frequency. Furthermore, the findings of the ANN model are substantially identical to those of the numerical model, with a small margin of error.

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Free vibration analysis of cantilever open-hole composite plates

Cited by 20 publications

References 25 publications

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

An overview of mechanical properties and failure mechanism of FRP laminates with hole/cutout

Tailored Microcantilever Optimization for Multifrequency Force Microscopy

Finite Element and Neural Network Based Predictive Model to Determine Natural Frequency of Laminated Composite Plates with Eccentric Cutouts under Free Vibration

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