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Title of Journal: Acta Mech

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Abbravation: Acta Mechanica

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Springer Vienna

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DOI

10.1002/ijc.2910440720

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1619-6937

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A new efficient higherorder shear deformation the

Authors: Sandipan Nath Thakur Chaitali Ray Subrata Chakraborty
Publish Date: 2016/07/29
Volume: 228, Issue: 1, Pages: 69-87
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Abstract

Appropriate representation of the displacement field is important to establish proper stress distribution including shearfree condition at free surfaces for a laminated composite shell used in real engineering applications The present study attempted to develop a more accurate higherorder displacement field for the analysis of a doubly curved laminated composite shell with hbox C0 finite element model based on higherorder shear deformation theory A new displacement function is proposed for static and free vibration analysis of such a shell The accurate strain displacement relationship is applied in the analysis of a shell structure with exactly zero shearfree condition at top and bottom surfaces The proposed model is capable of determining the accurate shear stress distribution across the thickness of the laminate Moderately deep and thick shells can be analyzed very accurately as the ratio of thickness coordinate to radius of curvature is incorporated in the formulation An eightnoded isoparametric shell element with seven degrees of freedom at each node is used to formulate the finite element model The numerical results in terms of deflection stresses and natural frequencies obtained by the present formulations are compared with those available in the published literature to validate the accuracy of the proposed model

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