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Aerospace 2015, 2(4), 637-672; doi:10.3390/aerospace2040637

C0 Layerwise Model with Fixed Degrees of Freedom and Variable In- and Out-of-Plane Kinematics by Strain Energy Updating Technique

Dipartimento di Ingegneria Meccanica e Aerospaziale, Politecnico di Torino—Corso Duca degli Abruzzi 24, 10129 Torino, Italy
These authors contributed equally to this work.
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Academic Editor: Konstantinos Kontis
Received: 19 October 2015 / Revised: 11 November 2015 / Accepted: 11 November 2015 / Published: 17 November 2015
(This article belongs to the Collection Feature Papers in Aerospace)
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Abstract

Physically based zigzag models have the merit of giving accurate stress predictions for laminates and sandwiches keeping fixed the functional degrees of freedom, though at the expense of the introduction of their derivatives. In the present paper, a technique that enables deleting these derivatives is developed. The objective is finding a priori corrections of displacements, which make the energy of the model with all the derivatives neglected equivalent to that of its initial counterpart model containing all the derivatives. Numerical applications show that this technique can obtain accurate results, even for strongly asymmetrical lay-ups, keeping low the computational cost. View Full-Text
Keywords: zigzag model; fixed degrees of freedom (d.o.f.); technique for converting derivatives; stress analysis zigzag model; fixed degrees of freedom (d.o.f.); technique for converting derivatives; stress analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Icardi, U.; Sola, F. C0 Layerwise Model with Fixed Degrees of Freedom and Variable In- and Out-of-Plane Kinematics by Strain Energy Updating Technique. Aerospace 2015, 2, 637-672.

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