Natural frequency and buckling optimization of laminated hybrid composite plates using genetic algorithm and simulated annealing

Karakaya, Şükrü; Soykasap, Omer

doi:10.1007/s00158-010-0538-2

Cited by 50 publications

(18 citation statements)

References 22 publications

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“…Although H4 hybrid disc springs have more carbon/epoxy plies, in comparison to H2, H2 has greater maximum load capacity. Here, the positive effect of using rigid carbon/epoxy for outer plies and symmetric lamination are clearly seen [16].…”

Section: Hybrid Composite Disc Springmentioning

confidence: 79%

Investigation of Hybrid and Different Cross-Section Composite Disc Springs Using Finite Element Method

Karakaya

2012

Transactions of the Canadian Society for Mechanical Engineering

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In this study the effectiveness of composite disc springs with different cross-section and hybrid type are determined by taking into account load capacities, masses, hybridization characteristics and costs of composite disc springs. The disc springs are analyzed with ABAQUS finite elements program by compressing between two rigid plates. The load-deflection characteristics obtained as a result of the analysis are compared with the analytic and experimental studies. Then different cross-section and hybrid composite disc springs were modeled. The trapeze A disc spring were confirmed to be more advantageous in terms of load capacity and mass by investigating the modeled disc springs. The effect of hybridization on hybrid disc springs with standard cross-section was investigated and optimum hybrid disc spring was determined according to cost and maximum loading capacity. Consequently, it is determined that carbon/epoxy plies used for outer layers are more advantageous. But the outer ply subjected to force was damaged thus this layer should be particularly reinforced.

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Section: Hybrid Composite Disc Springmentioning

confidence: 79%

Investigation of Hybrid and Different Cross-Section Composite Disc Springs Using Finite Element Method

Karakaya

2012

Transactions of the Canadian Society for Mechanical Engineering

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“…GA is a bionic algorithm inspired by natural evolution which is especially suitable for parallelizing the algorithm since the calculations of each generation are independent of one another. 12,[31][32][33] As one type of metaheuristic algorithms, GA works by iteratively improving themselves with past data after each iteration rather than performing a stochastic or exhaustive search. Initialization, crossover, selection, and mutation are four basic bio-inspired operators used in the procedure of GA.…”

Section: Gamentioning

confidence: 99%

Modification of boundary condition for the optimization of natural frequencies of plate structures with fluid loading

Mak

2018

Advances in Mechanical Engineering

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A finite element method, boundary element method, and genetic algorithm combined method is developed for the optimization of natural frequencies of fluid-loaded plates. In this method, the coupled finite element method-boundary element method is used for the free flexural vibration analysis of plates with arbitrary fluid loading effects and arbitrary elastic boundary conditions, and the genetic algorithm method is combined with the finite element method-boundary element method for searching the optimal values of plate's boundary parameters. By using this method, multiple natural frequencies of a given fluid-loaded plate can be optimized simultaneously to different target values. The coupled finite element method-boundary element method is first validated by comparing with earlier published results. The proposed optimization method is then applied to the optimal boundary condition design of four different cases. The results show natural frequencies of a fluid-loaded plate are sensitive to its boundary conditions. The possibility of optimizing the natural frequencies of a fluid-loaded plate by modifying boundary conditions is demonstrated, as well as the effectiveness of the proposed method as a structural optimization tool. According to the authors' knowledge, this study is the first attempt of optimizing fluid-loaded plate natural frequencies by considering arbitrary boundary conditions as optimization variables.

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“…2–5 Reduction of the structural mass is a critical factor for aerospace applications, whereas it is minor factor for other aspects, like marine applications. 6 When structures are exposed to severe vibration circumstances, a frequent goal of designing such vibrating structures is to avoid resonance caused by external excitations, and natural frequency maximization, especially the fundamental one 7–9 is of great importance in the design of composite laminates to decrease the risk of resonance. For example, by using lamination parameters, Abdalla et al.…”

Section: Introductionmentioning

confidence: 99%

Maximization of fundamental frequency and buckling load for the optimal stacking sequence design of laminated composite structures

Chen

2018

Proceedings of the IMechE

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The paper illustrates the application of a two-level approximation method to the lay-up design of laminated structures for maximization of fundamental frequency and buckling load with design constraints. Previously developed for the mass-minimization design, the approximation method was achieved by starting from an initial design of stacking sequence. Benchmark examples have verified its efficacy in dealing with the mass-reduction problems, but it does not have the capability to address the objective-maximization problems, which is mainly due to the limitation of the second-level approximate problem. In this work, this method is improved and extended for the consideration of objective maximization with more design constraints. The second-level approximate problem is reconstructed with mixed direct/reciprocal design variables, suitable for solving maximization problems. By varying different initial designs of stacking sequence and conducting repeated runs in the numerical examples, its efficiency is significantly shown after making comparisons with other methods.

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Natural frequency and buckling optimization of laminated hybrid composite plates using genetic algorithm and simulated annealing

Cited by 50 publications

References 22 publications

Investigation of Hybrid and Different Cross-Section Composite Disc Springs Using Finite Element Method

Investigation of Hybrid and Different Cross-Section Composite Disc Springs Using Finite Element Method

Modification of boundary condition for the optimization of natural frequencies of plate structures with fluid loading

Maximization of fundamental frequency and buckling load for the optimal stacking sequence design of laminated composite structures

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