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Retracted : Positional finite element solutions for laminated composites
Authors: Amal Sinaceur, Ahmed Sahli, Sara Sahli
Number of views: 383
This paper deals with the development a finite element of laminated planar gantry based on the positional formulation whose kinematics enables independent turns and variation of slab thickness in an extension of the Layerwise theory. The objective is to verify the results obtained with the element proposed in this work and to compare its efficiency in relation to the two-dimensional finite elements. In addition, the analyzes are performed in order to verify the consistency, the efficiency and the robustness of the formulation with respect mainly to the correct representation of the stresses distributions.
It is intended, therefore, to obtain an element capable of performing non-linear geometric analyzes in structures of plane porticoes composed of laminated composite materials with thin or thick cross-section. Thus, the results of strain distributions and stresses are expected to be more realistic along the thickness and interfaces, aiming at future modelling of the lamination failure process by delamination or sliding. The finite element proposed in this work presents a kinematics based on the Layerwise theory, but with positions intrinsically compatible by the positional mapping functions themselves. The formulation is geometric nonlinear with the possibility of large displacements and rotations and the proposed kinematics allows to represent the Zigzag effect and the transverse heterogeneity. In all examples, numerical analyzes are performed on the Ansys software using two-dimensional finite elements.