| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rebulla, Sergio Minera
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2019Efficient 3D Stress Capture of Variable-Stiffness and Sandwich Beam Structurescitations
- 2019Comparing the effect of geometry and stiffness on the effective load paths in non-symmetric laminates
- 2019Geometrically nonlinear finite element model for predicting failure in composite structurescitations
- 2019On the accuracy of localised 3D stress fields in tow-steered laminated composite structurescitations
- 2018Three-dimensional stress analysis for laminated composite and sandwich structurescitations
- 2018Three-dimensional stress analysis for beam-like structures using Serendipity Lagrange shape functionscitations
- 2017On the accuracy of the displacement-based Unified Formulation for modelling laminated composite beam structures
- 2017Linearized buckling analysis of thin-walled structures using detailed three-dimensional stress fieldscitations
- 2017Continuum mechanics of beam-like structures using onedimensional finite elements based on Serendipity Lagrange cross-sectional discretisationscitations
- 20173D stress analysis for complex cross-section beams using unified formulation based on Serendipity Lagrange polynomial expansion
- 2017A Computationally Efficient Model for Three-dimensional Stress Analysis of Stiffened Curved Panels
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article
Geometrically nonlinear finite element model for predicting failure in composite structures
Abstract
Composite structures are extensively used in many industries, where they are subjected to a variety of loads and may undergo large deformations. Reliable utilisation of such structures requires prior knowledge of their failure response. In order to predict failure loads and modes, accurate, yet computationally efficient, evaluation of three-dimensional (3D) stress fields becomes important. In this paper, we present a modelling approach, based on the Unified Formulation, that accounts for geometric nonlinearity in laminated composites and predicts 3D stress fields for subsequent failure analysis. The approach builds upon the hierarchical Serendipity Lagrange finite elements and is able to capture high-order shear deformation, as well as local cross-sectional warping. A total Lagrangian approach is adopted and the classic Newton-Raphson method is employed to solve the nonlinear governing equations. A key novelty of the proposed formulation is its completeness and its applicability to fully anisotropic structures. In other words, using the Green-Lagrange strain components within the Unified Formulation framework, the explicit form of the tangent stiffness matrix is derived including general stiffness properties. This new model is benchmarked against 3D finite element solution, as well as other formulations available in the literature, by means of static analyses of highly nonlinear, laminated composite beam-like structures. Significant computational efficiency gains over 3D finite elements are observed for similar levels of accuracy. Furthermore, to show the enhanced capabilities of the present formulation, the postbuckling response of a composite stiffened panel is compared with experimental results from the literature. The 3D stress fields computed in the postbuckling regime are used to detect failure of the stiffened panel. The corresponding failure mode, as obtained by the new model, is shown to match with the experiment.