A discrete model for the design sensitivity analysis of multi-layered composite shells of revolution

Soares, Cristovão M. Mota; Cordeiro, N. M. Marques; Barbosa, J. Infante

http://hdl.handle.net/10400.13/3378

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Authors

Soares, Cristovão M. Mota

Cordeiro, N. M. Marques

Barbosa, J. Infante

Abstract(s)

This paper studies the sensitivity analysis for the optimization of the multi-layered composite axisymmetric shells subjected to arbitrary static loading and free vibrations. The structural analysis is carried out using a two node frustum-cone finite element with 16 degrees of freedom based on Love-Kirchhoff assumptions. The design variables are the angle of orientation of the fibers and/or the vectorial distances from middle surface to upper surface of each ply. The constraint functions are displacements, stresses (Tsai-Hill criterion) and the natural frequency of a specified mode shape. Four types of objective functions can be used: maximum displacement or natural frequency or elastic strain energy and material volume. The design sensitivities are calculated analytically, semi-analytically and by global finite difference. The potentiality of the proposed model and the accuracy of the sensitivities of response are discussed with reference to the applications.

Keywords

Composite axisymmetric shells . Faculdade de Ciências Exatas e da Engenharia

URI

http://hdl.handle.net/10400.13/3378

Citation

Soares, C. M. M., Cordeiro, N. M., & Barbosa, J. I. (1995). A discrete model for the design sensitivity analysis of multi-layered composite shells of revolution. Composites Engineering, 5(5), 533-550.