Two-level optimization technique of composite laminate panels by genetic algorithms

Yamazaki, Koetsu

doi:10.2514/6.1996-1539

Cited by 45 publications

(36 citation statements)

References 6 publications

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“…The two-level approach has been applied as an eective means [25] to solve complex optimization problems that are involved in the design of composite laminates. Recently, it was successfully applied to solve a challenge optimization problem for tow-steering composite laminates [35], which possess spatially varying material properties.…”

Section: Lamination Parametersmentioning

confidence: 99%

“…The optimization process for the postbuckling behaviour design of composite laminated plates is conducted in a two-level strategy using lamination parameters as intermediate design variables [25]. Diaconu and Weaver [26] derived the closed-form solution for the initial postbuckling response of innitely long and symmetrically laminated composite plates, and applied it into a two-level strategy for the postbuckling optimization.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design for the Moderately Deep Postbuckling Behavior of Composite Plates

Raju

2017

Journal of Aircraft

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Section: Lamination Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Design for the Moderately Deep Postbuckling Behavior of Composite Plates

Raju

2017

Journal of Aircraft

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“…At the end of the rst step, we recover a smooth, continuous variation of lamination parameters that satisfy feasibility constraints on their values. At the second step, smooth, spatially varying distributions of ber orientation angles are retrieved from the target lamination parameters using a genetic algorithm (GA) in a similar way to that done previously [34,35]. The two-level approach provides an ecient way to solve the optimization problem, especially for VAT laminates.…”

Section: Introductionmentioning

confidence: 99%

“…In the current work, the buckling optimization of VAT plates is carried out within an enhanced two-level strategy, which advances the optimization framework rst proposed by Yamazaki [34] and further developed by Weaver and coworkers [3537] for straight ber composites. At the rst step, structural analysis is conducted using a Rayleigh-Ritz method in which novel explicit expressions for plate-level stiness matrices are written in terms of component material invariants and lamination parameters.…”

Section: Introductionmentioning

confidence: 99%

Framework for the Buckling Optimization of Variable-Angle Tow Composite Plates

2015

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The variable angle tow (VAT) technique allows bers to be steered curvilinearly.In doing so, it oers substantially enlarged freedom for stiness tailoring of composite laminates. Prior work has shown that VAT composite structures can have improved buckling and postbuckling load carrying capability when compared to straight ber composites. However, their structural analysis and optimal design is signicantly more computationally expensive than conventional laminates due to the exponential increase in number of variables associated with spatially varying planar ber orientations in addition to the usual stacking sequence considerations. In this work, an ecient two-level optimization framework using lamination parameters as design variables has been enhanced and generalised to the design of VAT plates. At the rst level, a computationally ecient Rayleigh-Ritz model is adopted to compute the buckling load of VAT plates and is used with a globally convergent gradient-based algorithm (GCMMA) to determine the optimal distribution of lamination parameters. As a result of this analysis, new explicit stiness matrices are found in terms of component material invariants and lamination parameters. The spatial variation of lamination parameters over the planform of VAT plates is represented in the form of B-splines.The convex hull property of B-splines ensures the point-wise feasibility of lamination parameters, and notably, ensures feasibility between control points as well as at them.

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“…Since the 1990s, different design systems which aim to overcome these limitations have been proposed. These proposals have involved approaches ranging from traditional techniques such as classical nonlinear optimization procedures combined with finite element modelling [4,5], through generic task methods and case-based reasoning [6], to modern artificial intelligence techniques [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Memetic Computing Applied to the Design of Composite Materials and Structures

Peláez

Gómez-Ruiz

Veintimilla

et al. 2017

Mathematical Problems in Engineering

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Presently, there exists an important need for lighter and more resistant structures, with reduced manufacturing costs. Laminated polymers are materials which respond to these new demands. Main difficulties of the design process of a composite laminate include the necessity to design both the geometry of the element and the material configuration itself and, therefore, the possibilities of creating composite materials are almost unlimited. Many techniques, ranging from linear programming or finite elements to computational intelligence, have been used to solve this type of problems. The aim of this work is to show that more effective and dynamic methods to solve this type of problems are obtained by using certain techniques based on systematic exploitation of knowledge of the problem, together with the combination of metaheuristics based on population as well as on local search. With this objective, a memetic algorithm has been designed and compared with the main heuristics used in the design of laminated polymers in different scenarios. All solutions obtained have been validated by the ANSYS5 software package.

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Two-level optimization technique of composite laminate panels by genetic algorithms

Cited by 45 publications

References 6 publications

Analysis and Design for the Moderately Deep Postbuckling Behavior of Composite Plates

Analysis and Design for the Moderately Deep Postbuckling Behavior of Composite Plates

Framework for the Buckling Optimization of Variable-Angle Tow Composite Plates

Memetic Computing Applied to the Design of Composite Materials and Structures

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