Buckling Analysis and Stacking Sequence Optimization of Symmetric Laminated Composite Plates

Çakıroğlu, Celal; Bekdaş, Gebrai̇l

doi:10.1007/978-3-030-61848-3_9

Cited by 2 publications

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References 10 publications

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“…The first buckling modes of a CFRP plate without cut-outs are shown in Figure 4 for all three aspect ratios. The critical uniaxial compressive load of a symmetric laminated composite plate with simply supported boundary conditions can be calculated using Equation (2), where D 1 , D 2 , D 3 are the plate stiffness values and m, n are the numbers of half-sine waves in the buckled plate in the x and y directions, respectively [59]. Figure 5 conceptually shows the variation of the critical line load for the different aspect ratios when stiffness parameters have fixed values.…”

Section: Resultsmentioning

confidence: 99%

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Metaheuristic Optimization of Laminated Composite Plates with Cut-Outs

et al. 2021

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The stacking sequence optimization of laminated composite plates while maximizing the structural performance or minimizing the weight is a subject investigated extensively in the literature. Meanwhile, research on the optimization of laminates with cut-outs has been relatively limited. Cut-outs being an indispensable feature of structural components, this paper concentrates on the stacking sequence optimization of composite laminates in the presence of circular cut-outs. The buckling load of a laminate is used as a metric to quantify the structural performance. Here the laminates are modeled as carbon fiber-reinforced composites using the finite element analysis software, ABAQUS. For the optimization, the widely used harmony search algorithm is applied. In terms of design variables, ply thickness, and fiber orientation angles of the plies are used as continuously changing variables. In addition to the stacking sequence, another geometric variable to consider is the aspect ratio (ratio of the length of the longer sides to the length of the shorter sides of the plate) of the rectangular laminates. The optimization is carried out for three different aspect ratios. It is shown that, by using dispersed stacking sequences instead of the commonly used 0°/±45°/±90° fiber angle stacks, significantly higher buckling loads can be achieved. Furthermore, changing the cut-out geometry is found to have a significant effect on the structural performance.

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Section: Resultsmentioning

confidence: 99%

“…In the case of a square plate with a symmetric stacking sequence, the equation for the buckling load of a plate is given in Equation (A1) [59].…”

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confidence: 99%

Metaheuristic Optimization of Laminated Composite Plates with Cut-Outs

et al. 2021

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“…Structural optimization aims at designing structures with the best possible dimensions that minimize cost without any impact on structural performance. In recent years metaheuristic optimization techniques have been increasingly applied to the optimization of different structures such as cylindrical reinforced concrete walls [ 1 , 2 ], retaining walls [ 3 , 4 , 5 ], plate girders [ 6 ], laminated composite plates [ 7 , 8 , 9 ], concrete-filled steel tubes [ 10 , 11 ], truss systems [ 12 ], timber structures [ 13 ], and liquid mass dampers [ 14 , 15 , 16 ]. These algorithms can be divided into evolutionary, physics-based, swarm-based, and population-based algorithms [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization and Predictive Modeling of Reinforced Concrete Circular Columns

et al. 2022

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Metaheuristic optimization techniques are widely applied in the optimal design of structural members. This paper presents the application of the harmony search algorithm to the optimal dimensioning of reinforced concrete circular columns. For the objective of optimization, the total cost of steel and concrete associated with the construction process were selected. The selected variables of optimization include the diameter of the column, the total cross-sectional area of steel, the unit costs of steel and concrete used in the construction, the total length of the column, and applied axial force and the bending moment acting on the column. By using the minimum allowable dimensions as the constraints of optimization, 3125 different data samples were generated where each data sample is an optimal design configuration. Based on the generated dataset, the SHapley Additive exPlanations (SHAP) algorithm was applied in combination with ensemble learning predictive models to determine the impact of each design variable on the model predictions. The relationships between the design variables and the objective function were visualized using the design of experiments methodology. Applying state-of-the-art statistical accuracy measures such as the coefficient of determination, the predictive models were demonstrated to be highly accurate. The current study demonstrates a novel technique for generating large datasets for the development of data-driven machine learning models. This new methodology can enhance the availability of large datasets, thereby facilitating the application of high-performance machine learning predictive models for optimal structural design.

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Buckling Analysis and Stacking Sequence Optimization of Symmetric Laminated Composite Plates

Cited by 2 publications

References 10 publications

Metaheuristic Optimization of Laminated Composite Plates with Cut-Outs

Metaheuristic Optimization of Laminated Composite Plates with Cut-Outs

Optimization and Predictive Modeling of Reinforced Concrete Circular Columns

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