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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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Hühne, Christian
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Increased accuracy of service life prediction for fiber metal laminates by consideration of the manufacturing-induced residual stress statecitations
- 2024Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperaturecitations
- 2024STRUCTURAL PART STIFFNESS TEST IN COMPARISON TO THE FE-PREDICTION. A TEST COMBINING CONTINUOUS STRUCTURE WITH COMPLEX INTERFACES
- 2024Equivalent plate formulation of Double-Double laminates for the gradient-based design optimization of composite structurescitations
- 2024Local Surface Toughening – A boltless crack stopping technology for aerospace structures
- 2024Validation of static residual strength analyses of fiber composite bonded joints
- 2023Steigerung der Robustheit von strukturellen Klebungen mittels Surface Toughening am Beispiel HAP
- 2023Anisotropic flexure hinges: Manufacturing and mechanical characterization forapplication in pressure-actuated morphing structures
- 2023THERMAL CONDUCTIVITY CHARACTERIZATION OF A CFRP SINGLE-LAP JOINT
- 2023Curvature Analysis of asymmetric Specimes for the residual stress quantification in fiber metal laminates
- 2023Comparison of Continuum Shell and Solid Element-Based Modeling Strategies for Mesoscale Progressive Damage Analysis of Fiber Compositescitations
- 2023Investigations on Guided Ultrasonic Wave Dispersion Behavior in Fiber Metal Laminates Using Finite Element Eigenvalue Analysiscitations
- 2023Anisotropic flexure hinges: Manufacturing and mechanical characterization for application in pressure-actuated morphing structurescitations
- 2023Gradient-based Design Optimization of Composite Structures using Double-Double Laminates
- 2023Aeroelastic Analysis of Actuated Adaptive Wingtips Based on Pressure-Actuated Cellular Structures
- 2023Effect of low temperature on mode I and mode II interlaminar fracture toughness of CFRP-steel hybrid laminatescitations
- 2022Polyetherimide-Reinforced Smart Inlays for Bondline Surveillance in Composites
- 2022In-situ quantification of manufacturing-induced strains in fiber metal laminates with strain gages
- 2022Applicability of Asymmetric Specimens for Residual Stress Evaluation in Fiber Metal Laminatescitations
- 2020Surface toughening - An industrial approach to increase the robustness of pure adhesive joints with film adhesivescitations
- 2019Decision Tree-based Machine Learning to Optimize the Laminate Stacking of Composite Cylinders for Maximum Buckling Load and Minimum Imperfection Sensitivity
- 2016Degradation analysis of fibre-metal laminates under service conditions to predict their durability
- 2016Experimental investigations on residual stresses during the fabrication of intrinsic CFRP-steel laminates
- 2013Effective lightweight design of a rocket interstage ring through mixed-integer optimization
- 2012Experimental identification of process parameters inducing warpage of autoclave-processed CFRP partscitations
- 2011A semi-analytical simulation strategy and its application to warpage of autoclave-processed CFRP partscitations
- 2005Robuster Entwurf beulgefährdeter, unversteifter Kreiszylinderschalen aus Faserverbundwerkstoff ; Robust Design of Unstiffened Cylindrical Shells made of Composite Material
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document
Effective lightweight design of a rocket interstage ring through mixed-integer optimization
Abstract
The full lightweight potential of carbon fiber reinforced plastics in complex structures can onlybe exploited using an adequate combination of material and design. Potential combinations can be found, usingan optimization routine integrated into the design process. This paper presents a detailed comparison of theoptimization results for distinctive rocket interstage design concepts. The complex cylindrical grid structure hasto withstand the mission loads while being as light as possible. For the efficient use of the superior materialproperties, carbon fiber reinforced plastics are combined with a foam core to form a sandwich configuration.To minimize the total mass, parametric finite element models are used within a constrained, mixed-integeroptimization. The structure is modeled using a bottom up strategy. An optimization framework, incorporatingthe CAE software Ansys into the multi-purpose optimization package pyOpt, is presented. The augmentedlagrangian particle swarm algorithm is used to find the configurations having minimal weight. As manufacturabilityis an important design requirement, a winding process is represented by constraints in the parameter set ofthe geometry. The stiffnesses of the structure, as well as strength criteria of the laminate are used as inequalityconstraints for the optimization. Further on, a lower bound of the first natural eigenfrequency using additionalconstraints, is investigated. Finally, the impact of the governing geometry, material parameters and hence theirinfluences on the optimization problem are carefully reviewed. It is shown that appropriate design – materialcombinations can significantly reduce the structural mass.