This paper presents a novel methodology to construct refined shell finite elements. The approach makes use of the axiomatic-asymptotic method and leads to the definition of Best Theory Diagrams. The typical results provided by the proposed methodology are the minimum set of unknown variables required to meet a given accuracy level if compared to 3D results and the best accuracy available for given computational cost. Also, the current approach can serve as a tool to assess the accuracy and computational accuracy of any structural model. The numerical results focus on isotropic and multilayer shells and highlight the importance of specific higher-order terms in refined models. Via the appropriate choice of the effective terms, the present technique succeeded in halving the number of nodal degrees of freedom without significant accuracy degradations.

Best Theory Diagrams for Shell Finite Elements / Petrolo, M.; Carrera, E.. - ELETTRONICO. - (2019). ((Intervento presentato al convegno AIAA Scitech 2019 Forum tenutosi a San Diego, USA nel 7-11 January 2019 [10.2514/6.2019-1765].

Best Theory Diagrams for Shell Finite Elements

M. Petrolo;E. Carrera
2019

Abstract

This paper presents a novel methodology to construct refined shell finite elements. The approach makes use of the axiomatic-asymptotic method and leads to the definition of Best Theory Diagrams. The typical results provided by the proposed methodology are the minimum set of unknown variables required to meet a given accuracy level if compared to 3D results and the best accuracy available for given computational cost. Also, the current approach can serve as a tool to assess the accuracy and computational accuracy of any structural model. The numerical results focus on isotropic and multilayer shells and highlight the importance of specific higher-order terms in refined models. Via the appropriate choice of the effective terms, the present technique succeeded in halving the number of nodal degrees of freedom without significant accuracy degradations.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2722613
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