Fundamental frequency optimization of variable stiffness composite skew plates

Farsadi, Touraj; Asadi, Davood; Kurtaran, Hasan

doi:10.1007/s00707-020-02871-9

Cited by 25 publications

(5 citation statements)

References 37 publications

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“…Besides, the NF and the buckling load were defined by utilizing the one-dimensional Carrera's unified formulation (1D-CUF). Similarly, Farsadi et al [243] employed GA optimization methodologies to optimize the FF of composite skew plates with variable stiffness. Contrary, Jing et al [244] developed a new variable stiffness optimization algorithm (VSOA) to optimize the vibration of variable stiffness CPs by utilizing a linear deviation fiber path function.…”

Section: Plate Structurementioning

confidence: 99%

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Al Mahmoud,

Safaei,

Sahmani

et al. 2024

Arch Computat Methods Eng

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Recently, the mechanical performance of various mechanical, electrical, and civil structures, including static and dynamic analysis, has been widely studied. Due to the neuroma's advanced technology in various engineering fields and applications, developing small-size structures has become highly demanded for several structural geometries. One of the most important is the nano/micro-plate structure. However, the essential nature of highly lightweight material with extraordinary mechanical, electrical, physical, and material characterizations makes researchers more interested in developing composite/laminated-composite-plate structures. To comprehend the dynamical behavior, precisely the linear/nonlinear-free vibrational responses, and to represent the enhancement of several parameters such as nonlocal, geometry, boundary condition parameters, etc., on the free vibrational performance at nano/micro scale size, it is revealed that to employ all various parameters into various mathematical equations and to solve the defined governing equations by analytical, numerical, high order, and mixed solutions. Thus, the presented literature review is considered the first work focused on investigating the linear/nonlinear free vibrational behavior of plates on a small scale and the impact of various parameters on both dimensional/dimensionless natural/fundamental frequency and Eigen-value. The literature is classified based on solution type and with/without considering the size dependency effect. As a key finding, most research in the literature implemented analytical or numerical solutions. The drawback of classical plate theory can be overcome by utilizing and developing the elasticity theories. The nonlocality, weight fraction of porosity, or the reinforcements, and its distribution type of elastic foundation significantly influence the frequencies.

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Section: Plate Structurementioning

confidence: 99%

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Al Mahmoud,

Safaei,

Sahmani

et al. 2024

Arch Computat Methods Eng

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“…Nicholas et al [ 25 ] investigated the role of Artificial Neural Networks (ANN) and GA in the structural optimization of fiber reinforced composite turbine blades in terms of stacking sequence arrangements and found that using ANN instead of FE methods in the optimization process decreased the computational cost. Farsadi et al [ 26 ] used a GA coupled with a differential quadrature method to determine the best stacking sequence to optimize the natural frequencies of composite skewed plates under various end conditions, fiber path functions, and geometries. They found that adjusting the geometry and increasing the skew angle to 30° and 60° greatly increased the natural frequencies of the composite skewed plates.…”

Section: Introductionmentioning

confidence: 99%

Influence of multi‐walled carbon nanotubes reinforced honeycomb core on vibration and damping responses of carbon fiber composite sandwich shell structures

Maneengam

Siddique²,

Selvaraj³

et al. 2022

Polymer Composites

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In the present study, vibration and damping characteristics of the multi‐walled carbon nanotubes (MWCNT) reinforced honeycomb embedded sandwich composite shell structures have been investigated numerically using finite element (FE) method. The efficacy of the FE method by deriving the governing equations using higher order theory is verified by comparing the natural frequencies assessed using ABAQUS 3D FE model. The influence of MWCNT reinforcement, support condition, and radius of curvature on the dynamic performance of honeycomb sandwich shell with carbon fiber reinforced polymer (CFRP) composite face sheets are explored. In addition, the optimal ply orientations of the various configurations of CFRP sandwich shells with MWCNT/GFRP honeycomb are identified using the developed FE model coupled with genetic algorithm (GA) to enrich the natural frequencies and loss factors. Further, it can be observed that the reinforcement of MWCNTs in honeycomb core, geometry of shell structure, and optimal ply orientations significantly influences the natural frequencies and loss factors of the sandwich composite shell structures.

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“…It was verified that optimal variable stiffness designs provide higher frequencies (up to 10%) when compared to constant stiffness ones. More recently, Farsadi et al [9] included plates with different aspect ratios, boundary conditions and skew angles. The fundamental frequency was also studied and optimized together with other composite characteristics.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Frequency Optimization of Variable Angle Tow Laminates with Embedded Gap Defects

2022

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Variable stiffness composite laminates can improve the structural performance of composite structures by expanding the design space. This work explores the application of variable stiffness laminated composite structures to maximize the fundamental frequency by optimizing the tow angle. To this end, an optimization framework is developed to design the fiber angle for each layer based on the maximization of the fundamental frequency. It is assumed that the design process includes the manufacturing constraints encountered in the automated fiber placement process and a linear fiber angle variation. The current study improves existing results by considering embedded gap defects within the optimization framework. The plates are assumed symmetric, with clamped and simply supported boundary conditions. The optimal results and a comparison between the non-steered and steered plates with and without gaps are presented. Results show that, although gaps deteriorate the structural performance, fiber steering can still lead to an increase in the fundamental frequency depending on the plate’s geometry and boundary conditions.

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Fundamental frequency optimization of variable stiffness composite skew plates

Cited by 25 publications

References 37 publications

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Influence of multi‐walled carbon nanotubes reinforced honeycomb core on vibration and damping responses of carbon fiber composite sandwich shell structures

Fundamental Frequency Optimization of Variable Angle Tow Laminates with Embedded Gap Defects

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