Thèses sur le sujet « Carrera's Unified Formulation »
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DE, PIETRO GABRIELE. « Modeling and Design of Multi-Stable Composite Structures ». Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2729360.
Texte intégralHUI, YANCHUAN. « Multi-scale Modelling and Design of Composite Structures ». Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2739922.
Texte intégralFALLAHI, NASIM. « Analysis and Optimization of Variable Angle Tow Composites Through Unified Formulation ». Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2875739.
Texte intégralWenzel, Christian. « Local FEM Analysis of Composite Beams and Plates : free-Edge effect and Incompatible Kinematics Coupling ». Thesis, Paris 10, 2014. http://www.theses.fr/2014PA100107/document.
Texte intégralThis work considers local stress concentrations, especially the free-Edge effects of multilayered structures. At the interface of two adjacent layers with different elastic properties, the stresses can become singular in the intermediate vicinity of the free edge. This is valid while assuming a linear elastic material behaviour. As a consequence this zones are an essential delamination trigger. Via the Carrera Unified Formulation (CUF), different kinematical models are testes in order to obtain the correct local stress concentration. In the first part of this work, the reduced dimensional modelling approaches are compared. Two main class are presented: Equivalent Single Layer (ESL) models treating the layered structure like one homogenous plate of equal mechanical proper- ties, and the Layer Wise approach, treating each layer independently. Subsequently their capabilities to capture the appearing singularities are compared. In order to have a comparable measurement of those singularities, the obtained stress distributions will be expressed via a power law function, which has a priori a singular behaviour. Only two parameters fully describe therefore the singular stress components in the vicinity of the free edge. With the help of these two parameters not only the different models capabilities will be compared, but also the free edge effect itself will be measured and compared for different symmetrical laminates and the case of extensional and uniform bending load. The results for all laminates under both load cases confirm the before stated need for rather complex models in the vicinity of the free edge. However far from the free edges, in the composite plates centre, no significant difference can be noted for rather simple models. The second part of this work is therefore dedicated to the coupling of kinematically incompatible models. The use of costly expensive complex models is restricted to local domains of interest, while economic simple models will model the global do- main. The Extended Variational Formulation (XVF) is identified as the most suitable way to couple the kinematically heterogenous but dimensional homogenous models. As it uses a configuration with one common interface without domain overlap, the additional efforts for establishing the coupling are limited. Further the XVF offers the possibility to adapt the conditions imposed at the interface using a single scalar parameter. It will be shown that for the homogenous dimensional problem under consideration only two different conditions can be imposed by this parameter. One matching the strong conditions imposed by the classical Multi Point Constrains (MPC) and a second one providing a weak condition. The last one is shown to provide the possibility to reduce further the domain using the complex kinematical model, without the loss of local precision. As this is the first application of the XVF towards composite structures, the need for a new coupling operator was identified. A new form is proposed, tested and its robustness will be evaluated
REHAN, REHAN. « One-dimensional Advanced Beam Models for Marine Structural Applications ». Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2680980.
Texte intégralZAPPINO, ENRICO. « Variable kinematic 1D, 2D and 3D Models for the Analysis of Aerospace Structures ». Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2573739.
Texte intégralMAIARU', MARIANNA. « Multiscale approaches for the failure analysis of fiber-reinforced composite structures using the 1D CUF ». Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2571353.
Texte intégralKALEEL, IBRAHIM. « Computationally-efficient multiscale models for progressive failure and damage analysis of composites ». Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2729362.
Texte intégralLI, GUOHONG. « Variable Kinematic Finite Element Formulations Applied to Multi-layered Structures and Multi-field Problems ». Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2729361.
Texte intégralAUGELLO, RICCARDO. « Advanced FEs for the micropolar and geometrical nonlinear analyses of composite structures ». Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2872330.
Texte intégralVIGLIETTI, ANDREA. « Low Fidelity and High Fidelity Structural Models for Hybrid Composite Aircraft Structures ». Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2710182.
Texte intégralPAGANI, ALFONSO. « Component-wise models for static, dynamic and aeroelastic analyses of metallic and composite aerospace structures ». Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2598370.
Texte intégralVARELLO, ALBERTO. « Advanced higher-order one-dimensional models for fluid-structure interaction analysis ». Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2517517.
Texte intégralHui, Yanchuan, Gaetano GIunta, Salim Belouettar, Erasmo Carrera et Heng Hu. « Multi-scale Modelling and Design of Composite Structures ». Doctoral thesis, 2019. http://hdl.handle.net/11583/2728670.
Texte intégralWENZEL, CHRISTIAN. « Local FEM Analysis of Composite Beams and Plates : Free-Edge effect and Incompatible Kinematics Coupling ». Doctoral thesis, 2014. http://hdl.handle.net/11583/2582373.
Texte intégralKaleel, Ibrahim, Erasmo Carrera, Marco Petrolo et Anthony M. Waas. « Computationally-efficient multiscale models for progressive failure and damage analysis of composites ». Doctoral thesis, 2019. http://hdl.handle.net/11583/2728662.
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