Abstract
This work develops a kinematically linear shell model departing from a consistent nonlinear theory. The initial geometry is mapped from a flat reference configuration by a stress-free finite deformation, after which, the actual shell motion takes place. The model maintains the features of a complete stress-resultant theory with Reissner-Mindlin kinematics based on an inextensible director. A hybrid displacement variational formulation is presented, where the domain displacements and kinematic boundary reactions are independently approximated. The resort to a flat reference configuration allows the discretization using 2-D Multiple Fixed Least-Squares (MFLS) on the domain. The consistent definition of stress resultants and consequent plane stress assumption led to a neat formulation for the analysis of shells. The consistent linear approximation, combined with MFLS, made possible efficient computations with a desired continuity degree, leading to smooth results for the displacement, strain and stress fields, as shown by several numerical examples.
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Acknowledgments
The first author acknowledges his master studies funding by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) under grant number 2009/04525-5 and his PhD grant by CNPq (Conselho Nacional de Desenvolvimento Tecnológico). This work is part of the research activity carried out by the second author at ICIST, Instituto de Engenharia de Estruturas, Território e Construção, and has been partially financed by FCT (Fundação para a Ciência e Tecnologia) in the framework of Project ICIST, U0076. The third author acknowledges the support by CNPq (Conselho Nacional de Desenvolvimento Tecnológico) under the grant 301279/2009-8.
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Costa, J.C., Tiago, C.M. & Pimenta, P.M. Meshless analysis of shear deformable shells: the linear model. Comput Mech 52, 763–778 (2013). https://doi.org/10.1007/s00466-013-0837-8
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DOI: https://doi.org/10.1007/s00466-013-0837-8