Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Conference Object Mixed Finite Element Formulation for Laminated Composite Cylindrical Shells Based on Refined Zigzag Theory(Scipedia S.L., 2024) Dördüncü, Mehmet; Kutlu, A.; Dorduncu, M.; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThis paper presents a mixed finite element formulation to examine the linear static behavior of thin and moderately thick laminated composite cylindrical shells within the framework of the Refined Zigzag Theory (RZT). The RZT is very suitable for modeling thick and highly heterogeneous laminated composite structures without the need for the shear correction factor. The system's stationary condition is expressed by using the HellingerReissner principle. Finite element model employs four-noded quadrilateral elements with bilinear shape functions, meeting the C0 continuity requirements. The mixed finite element equations produce direct nodal displacements and stress resultants simultaneously. Comparisons and convergence analyses are performed by considering various lamination configurations and boundary conditions for validation purposes. © 2024, Scipedia S.L., All rights reserved.Article Citation - WoS: 3Citation - Scopus: 3Nonlocal Static Modeling of Laminated Composite Shells Using Peridynamic Differential Operator in a Higher-Order Shear Deformation Framework(Elsevier Ltd, 2025) Dördüncü, Mehmet; Dorduncu, Mehmet; Kutlu, Akif; Markert, Bernd; 01. Izmir Institute of Technology; 03. Faculty of Engineering; 03.10. Department of Mechanical EngineeringThis study investigates the flexural behaviour of the laminated composite shells in the framework of Higher-Order Shear Deformation Theory (HSDT) and Peridynamic Differential Operator (PDDO), namely PD-HSDT, for the first time. Laminated composite shell structures are widely used in aerospace, automotive, and marine industries due to their high strength-to-weight ratio and design flexibility. Therefore, understanding their mechanical behavior under various loading conditions is crucial for ensuring structural reliability and performance optimization. However, such structures may possess complex curvatures and highly heterogenous laminate stackings, leading to inaccurate numerical stress analyses. The HSDT successfully captures displacement and stress distributions as well as cross-sectional warping through higher-order functions exist in the kinematics. Moreover, the PDDO represents the local derivatives in their nonlocal form, making it well-suited for problems involving higher-order derivatives and discontinuities. The governing equations and boundary conditions of the HSDT are solved by using the PDDO to accurately achieve the stress and displacement fields in the laminated composite shells. The robustness of the PD-HSDT is established by considering various loading and boundary conditions. The proposed approach demonstrates high accuracy in stress and displacement predictions when validated against reference solutions available in existing literature. This indicates strong potential for extending the methodology to more complex loading scenarios and damage mechanisms in future studies.