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Discrete double directors shell element for the functionally graded material shell structures analysis
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DOI：10.1016/j.cma.2014.05.011.png)
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Abstract
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In this paper, the accuracy and the efficiency of the 3d-shell model based on a double directors shell element for the functionally graded material (FGM) shell structures analysis is studied. The vanishing of transverse shear strains on top and bottom faces is considered in a discrete form. Thus, the third-order shear deformation plate theory (TSDT) is a particular case of the discrete double directors shell model (DDDSM) used in the present work. The DDDSM is introduced to remove the shear correction factors, when using the first-order shear deformation theory (FSDT), and improve an excellent performance when compared with other works. This model can be used for static, free vibration and buckling analyses of FGM. The convergence of the proposed model is compared to other well-known formulations found in the literature. (C) 2014 Elsevier B.V. All rights reserved.
Keywords:
FGM
Shell element
Third-order deformation theory
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