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EnglishThe paper presents a locking-free four-node element for laminated composite and sandwich plates based on Refined Zigzag Theory (RZT). Initially, two RZT-based plate elements are derived using four-node and eight-node configurations, achieved by way of standard C0 isoparametric shape functions. In addition, with a view on improving the modelling of extremely thin plates, an anisoparametric four-node element is developed in which the transverse deflection variable is interpolated using quadratic polynomial shape functions, whereas the remaining kinematic variables are bilinear. A straightforward transverse-shear edge-constraint procedure gives rise to a four-node anisoparametric element. A further enhancement is achieved using an Element Shear Correction (ESC) factor that is derived from a strain-energy matching procedure. The resulting four-node element (ZQ4c) uses full Gauss quadrature, consistent load vector, and mass matrix. Furthermore, the ZQ4c stiffness matrix has no spurious zero-energy modes, and the element is extremely robust when modelling ultra-thin plates. Several numerical studies are carried out to demonstrate the predictive capabilities of the four elements examined in this investigation. It is concluded ZQ4c is a highly accurate element over a wide range of material systems and span-to-thickness ratios, and is the best performing element of the four elements examined in this study.
A robust four-node quadrilateral element for laminated composite and sandwich plates based on Refined Zigzag Theory / Sorrenti, M.; Di Sciuva, M.; Tessler, A.. - In: COMPUTERS & STRUCTURES. - ISSN 0045-7949. - ELETTRONICO. - 242(2020), pp. 1-22.
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| Titolo: | A robust four-node quadrilateral element for laminated composite and sandwich plates based on Refined Zigzag Theory |
| Autori: | |
| Data di pubblicazione: | 2020 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.compstruc.2020.106369 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 2021_CS_A_ robust_four-node_quadrilateral_plate_element_RZT.pdf | Published paper | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
| A Robust four-node FINAL Accepted_Version_with DOI.pdf | Accepted paper | 2. Post-print / Author's Accepted Manuscript |  | Embargo: 15/09/2022 Richiedi una copia |
http://hdl.handle.net/11583/2845827
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