A. Pagani

D. Scano

E. Carrera

R. Augello

English

PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino)

29 November 2022POLITECNICO DI TORINORepository ISTITUZIONALEAdvanced FEs for the analysis of composite structure with global/local and node-dependent kinematics approaches /Augello, R.; Carrera, E.; Pagani, A.; Scano, D.. - ELETTRONICO. - (2021). ((Intervento presentato al convegno 24thInternational Conference on Composite Structures (ICCS24) tenutosi a Porto, Portugal nel 14 - 18 June 2021.OriginalAdvanced FEs for the analysis of composite structure with global/local and node-dependent kinematicsapproachesPublisher:PublishedDOI:Terms of use:openAccessPublisher copyright(Article begins on next page)This article is made available under terms and conditions as specified in the  corresponding bibliographic description inthe repositoryAvailability:This version is available at: 11583/2918629 since: 2021-08-26T12:52:58ZICCS24Advanced FEs for the analysis of composite structurewith global/local and node-dependent kinematicsapproachesR. Augello*, E. Carrera, A. Pagani, D. Scano§Mul 2 GroupDepartment of Mechanical and Aerospace Engineering, Politecnico di TorinoCorso Duca degli Abruzzi 24, 10129 Torino, Italy.In the modern engineering, composite structures are widely adopted, especially in theaerospace industry. The outstanding mechanical propoerties which they ensure are due totheir heterogeneous nature. However, this gives rise to significant challenges to numericalmodeling. For this purpose, a great variety of structural models has been proposed in history.Models based on classical theories are capable to detect the structural behavior of slenderstructures, whereas when the transverse stresses of cross-section (for beams) or thickness (forplates/shells) need to be accurately described, refined models have to be included. Gener-ally, the accuracy of the model can be achieved by increasing the order of the mathematicalfunction used for the description of the cross-secion or thickness. This automatically leads toan increased number of degrees of freedom in FE models and makes the solution computa-tionally expensive. However, a local refinement of the model, where higher-order phenomenaare expected to occur, can help to reach a compromise between the desired accuracy andsolution expenses. The local refinement can be achieved adopting the global/local (see [1])or the Node-Dependent Kinematics (NDK) (see [2]) approaches. The former distinguishesthe kinematic theories at the FE level, whereas the latter at the structural node level. Thepresent work wants to apply these two mathematical techniques for the static analysis ofcomposite structures in the framework of the Carrera Unified Formulation ([3]). In fact, thisformulation allows to build FEs with low-order Equivalent Single Layer (ESL) theories andrefined Layer-Wise (LW) theories with ease and to mix them within the global/local and NDKscenarios. Several analyses are carried out employing 1D beams and 2D plates/shells models,showing the applicability of the two approaches and the advantages in terms of accuracy andcomputational saving that they guarantee.References[1] Li, X. and Dahsin L., “A laminate theory based on global–local superposition”, Commu-nications in numerical methods in engineering, (1995).*PhD Student. E-mail: riccardo.augello@polito.itProfessor of Aerospace Structures and Aeroelasticity. E-mail: erasmo.carrera@polito.itAssistant Professor. Corresponding author. E-mail: alfonso.pagani@polito.it§Post Graduate Research Assistant. E-mail: daniele.scano@studenti.polito.it1[2] Carrera, E. and Zappino, E. “One-dimensional finite element formulation with node-dependent kinematics” Computers & Structures, (2017).[3] Carrera, E. and Cinefra, M. and Petrolo, M. and Zappino, E., “Finite element analysisof structures through unified formulation” John Wiley & Sons, (2014).2

Advanced FEs for the analysis of composite structure with global/local and node-dependent kinematics approaches

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Advanced FEs for the analysis of composite structure with global/local and node-dependent kinematics approaches

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