A discrete model for the optimal design of thin composite plate-shell type structures using a two-level approach

Soares, Cristóvão M. Mota; Correia, Victor M. Franco; Mateus, H.C.; Herskovits, José

doi:10.1016/0263-8223(94)00042-5

Cited by 28 publications

(17 citation statements)

References 15 publications

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“…By using restart and post-processing structural analysis results, a sensitivity analysis formulation based on the variational or Lagrangian approach can also be efficiently developed and implemented (tIaug et al 1986;Mota Soares and Leal 1992). This last formulation is advantageous when the source code is not available.…”

Section: Dz I 26x Imentioning

confidence: 98%

Shape optimization of axisymmetric shells using a higher-order shear deformation theory

Csonka

Kozák

Soares

1995

Structural Optimization

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In this paper structural and sensitivity analysis for the optimization of laminated axisymmetric shells subjected to static constraints and arbitrary loading is presented. The shell thickness, radial coordinate of a nodal point, lamina thickness and the angle of orientation of the fibers are the design variables. The objective of the design optimization is the minimization of the volume of the shell or the strain energy. The model is based on a three-node axisymmetric finite element with 24 degrees of freedom. A higher-order theory is developed for the nonlinear distribution of the meridional displacement component through the thickness of the shell. The sensitivities of the discrete model developed are evaluated analytically using a symbolic manipulator. The efficiency and accuracy of the proposed model is discussed with reference to the applications.

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Section: Dz I 26x Imentioning

confidence: 98%

Shape optimization of axisymmetric shells using a higher-order shear deformation theory

Csonka

Kozák

Soares

1995

Structural Optimization

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“…Stacking sequence optimization of laminated cylindrical shells for buckling and free vibration using genetic algorithm and neural networks have been investigated by Gharib and Shakeri (2010). Mota Soares et al (1995) researched the sensitivity analysis of the optimization of general thin shell structures made of composite materials. Chern and Chao (2000) studied the natural frequencies of laminates in spherical, cylindrical, planed, and curved panel geometries by a three-dimensional theory.…”

Section: Laminated Cylindrical Shellsmentioning

confidence: 99%

Maximization of Fundamental Frequency of Laminated Composite Cylindrical Shells by Ant Colony Algorithm

Koide

Luersen

2013

J.Aerosp. Technol. Manag.

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The success in developing modern aerospace systems addresses competitive subjects as optimization, reduced costs, sustainability, environment, weight, and safety. There is an increased demand for lighter materials such as laminated composites. In order to match the demand of aeronautical companies, the shell structures are very important. The dynamic behavior of composite structures is also essential to improve the potential applications of these materials. The knowledge of the dynamic response of the cylindrical shell structures is an important issue in their design, in which the ply thicknesses are often preestablished and the ply orientations are usually restricted to a small set of angles due to manufacturing constraints. Obtaining the best stacking sequence of laminated shell may lead to a problem of combinatorial optimization. As this problem is hard to be solved, several techniques have been developed. Ant colony optimization is a class of heuristic optimization algorithms inspired by the behavior of real ants, related to their ability to find the shortest path between the nest and the food source. Thus, this paper deals with optimal stacking sequence of laminated cylindrical composite shells with the aim of maximizing their fundamental frequency using this approach. The ant colony algorithm was implemented in Matlab platform and was linked to Abaqus academic version to compute the structural response. Cylindrical shells with and without a cutout geometry were studied. Fundamental frequencies were maximized for both cases, and results were presented and discussed.

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“…Locating the globally optimal material design with a local search algorithm is almost a hopeless enterprise. For this reason, many researchers preferred global search algorithms like genetic algorithms (Soremekun et al, 2001;Todoroki & Tetsuya, 2004;Kang & Kim, 2005), simulated annealing algorithm (Soares et al, 1995;Jayatheertha et al, 1996;Sciuva et al, 2003;Correia et al, 2003;Erdal & Sonmez, 2005;Moita et al, 2006;Akbulut & Sonmez, 2008), improving hit-and run (Savic et al, 2001). …”

Section: Composites Optimizationmentioning

confidence: 99%

Structural Optimization Using Simulated Annealing

Sonmez¹

2008

Simulated Annealing

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A discrete model for the optimal design of thin composite plate-shell type structures using a two-level approach

Cited by 28 publications

References 15 publications

Shape optimization of axisymmetric shells using a higher-order shear deformation theory

Shape optimization of axisymmetric shells using a higher-order shear deformation theory

Maximization of Fundamental Frequency of Laminated Composite Cylindrical Shells by Ant Colony Algorithm

Structural Optimization Using Simulated Annealing

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