| 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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Groh, Rainer Mj
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (45/45 displayed)
- 2024Quantifying efficient shape-shiftingcitations
- 2024Dataset for computational and experimental buckling analysis of constant-stiffness and variable-stiffness composite cylinders
- 2023Local Analysis-Test Correlation of Tow-Steered Composite Shells with Small Cutouts
- 2023Increasing reliability of axially compressed cylinders through stiffness tailoring and optimizationcitations
- 2022Probing the stability landscape of prestressed stayed columns susceptible to mode interactioncitations
- 2021Optimization of imperfection-insensitive continuous tow sheared rocket launch structurescitations
- 2021Design of Shape-Adaptive Deployable Slat-Cove Filler for Airframe Noise Reductioncitations
- 2021Manufacture and buckling test of a variable-stiffness, variable-thickness composite cylinder under axial compressioncitations
- 2021Flexural analysis of laminated beams using zigzag theory and a mixed inverse differential quadrature method
- 2020Imperfection-Insensitive Continuous Tow-Sheared Cylinderscitations
- 2020A strain-displacement mixed formulation based on the modified couple stress theory for the flexural behaviour of laminated beams.citations
- 2020An efficient semi-analytical framework to tailor snap-through loads in bistable variable stiffness laminatescitations
- 2020Newton’s method for experimental path-following of nonlinear structures
- 2020Imperfection-Insensitive Continuous Tow Sheared Cylinder
- 2019Efficient 3D Stress Capture of Variable-Stiffness and Sandwich Beam Structurescitations
- 2019A strain-displacement variational formulation for laminated composite beams based on the modified couple stress theory
- 2019Happy Catastrophecitations
- 2019On the accuracy of localised 3D stress fields in tow-steered laminated composite structurescitations
- 2018A tailored nonlinear slat-cove filler for airframe noise reduction.
- 2018Generalised path-following for well-behaved nonlinear structurescitations
- 2018Design and testing of a passively adaptive inletcitations
- 2018Three-dimensional stress analysis for laminated composite and sandwich structurescitations
- 2018Extreme mechanics in laminated shellscitations
- 2018HCI meets Material Sciencecitations
- 2017Post-buckling analysis of variable-angle tow composite plates using Koiter's approach and the finite element methodcitations
- 2017Computationally efficient beam elements for accurate stresses in sandwich laminates and laminated composites with delaminationscitations
- 2017Investigation of failure initiation in curved composite laminates using a higher-order beam modelcitations
- 2017Adaptive air inlet for fluid flow control
- 2016Deleterious localised stress fieldscitations
- 2016Morphing structures for flow regulation
- 2016A computationally efficient 2D model for inherently equilibrated 3D stress predictions in heterogeneous laminated plates. Part Icitations
- 2016Adaptive Nonlinear Structures for Flow Regulation
- 2016Higher-order beam model for stress predictions in curved beams made from anisotropic materialscitations
- 2016A computationally efficient 2D model for inherently equilibrated 3D stress predictions in heterogeneous laminated plates. Part IIcitations
- 2016Mixed shell element for static and buckling analysis of variable angle tow composite platescitations
- 2016Koiter asymptotic analysis of Variable Angle Tow composite plates
- 2015Application of the Refined Zigzag Theory to the Modeling of Delaminations in Laminated Composites
- 2015Static inconsistencies in certain axiomatic higher-order shear deformation theories for beams, plates and shellscitations
- 2015A mixed-variational, higher-order zig-zag theory for highly heterogeneous layered structures
- 2015Mass Optimisation of Variable Angle Tow, Variable Thickness Panels with Static Failure and Buckling Constraintscitations
- 2015Full-field stress tailoring of composite laminates
- 2015On displacement-based and mixed-variational equivalent single layer theories for modelling highly heterogeneous laminated beamscitations
- 2014Buckling analysis of variable angle tow, variable thickness panels with transverse shear effectscitations
- 2014Post-buckling analysis of variable angle, variable thickness panels manufactured by Continuous Tow Shearing
- 2013Buckling analysis of variable angle tow, variable thickness panels with transverse shear effects
Places of action
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article
Increasing reliability of axially compressed cylinders through stiffness tailoring and optimization
Abstract
The capabilities of the rapid tow shearing (RTS) process are explored to reduce the well-known imperfection sensitivity of axially compressed cylindrical shells. RTS deposits curvilinear carbon fibre tapes with a fibre-angle-thickness coupling that enables the in situ manufacturing of embedded rings and stringers. By blending the material’s elastic modulus and wall thickness smoothly across the cylindrical surface, the load paths can be redistributed favourably with a minimal-design approach that contains part count and weight while ameliorating imperfection sensitivity. A genetic algorithm that incorporates realistic manufacturing imperfections and axial stiffness penalty is used to maximize the 99.9% reliability load of straight fibre (SF) and RTS cylinders. The axial stiffness penalty ensures that reliability does not come at the expense of stiffness. The first-order second-moment method is used to calculate statistical moments that enable an estimate of the 99.9% reliability load. Due to the fibre-angle-thickness coupling of RTS, buckling data are normalized by mass and thickness. Compared to a quasi-isotropic laminate, which corresponds to the optimal eight-layer design for a perfect cylinder, the optimized SF and RTS laminates have a 6% and 8% greater 99.9% normalized reliability load. By relaxing the axial stiffness penalty, the performance benefit can be increased such that SF and RTS cylinders exceed the 99.9% normalized reliability load of an eight-layer quasi-isotropic laminate by 23% and 37%, respectively. Both improvements (with and without penalty functions) stem largely from a reduction in the variance of the buckling-load distribution, thereby demonstrating the potential of fibre-steered cylinders in reducing the imperfection sensitivity of cylindrical shells.