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  • thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials  (106)
  • KIT Scientific Publishing  (106)
  • 2020-2024  (106)
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  • 2020-2024  (106)
Year
  • 1
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    Advanced Elastocaloric Cooling Devices Based on Shape Memory Alloy Films (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Elastocaloric cooling is an emerging solid-state cooling technology with the potential to provide environmentally friendly, efficient cooling. The elastocaloric effect in superelastic shape memory alloy films is used to develop advanced cooling devices for small-scale applications. Cascaded and parallelized devices are developed to increase device temperature span and cooling capacity. The concepts are proven experimentally, a maximum temperature span of 27° C is achieved in a cascaded device.
    Keywords: Elastokalorik ; Festkörperkühlung ; Kaskadierte Kühleinheit ; Superelastische Formgedächtnislegierung ; Aktive Miniatur Kühlung ; Elastocaloric Cooling ; Solid-State Cooling ; Superelastic Shape Memory Alloy ; Cascaded Cooling Device ; Small Scale Cooling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 2
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    Microstructure modeling and crystal plasticity parameter identification for predicting the cyclic mechanical behavior of polycrystalline metals (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Computational homogenization permits to capture the influence of the microstructure on the cyclic mechanical behavior of polycrystalline metals. In this work we investigate methods to compute Laguerre tessellations as computational cells of polycrystalline microstructures, propose a new method to assign crystallographic orientations to the Laguerre cells and use Bayesian optimization to find suitable parameters for the underlying micromechanical model from macroscopic experiments.
    Keywords: Polykristalline Metalle; Ermüdung; Mikromechanische Modellierung; Laguerre-Kachelungen; Texturkoeffizienten-Optimierung; Polycrystalline metals; Fatigue; Micromechanical modeling; Laguerre tessellations; Texture coefficients optimization ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 3
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    Thermomechanical Modeling and Experimental Characterization of Sheet Molding Compound Composites (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The aim of this work is to model and experimentally characterize the anisotropic material behavior of SMC composites on the macroscale with consideration of the microstructure. Temperature-dependent thermoelastic behavior and failure behavior are modeled and the corresponding material properties are determined experimentally. Additionally, experimental biaxial damage investigations are performed. A parameter identification merges modeling and experiments and validates the models.
    Keywords: SMC Verbundwerkstoff; Thermomechanische Eigenschaften; Mikrostrukturbasierte Makromodellierung; Biaxiale Schädigungs- und Versagens-Experimente; SMC composite; Thermomechanical properties; Microstructure-based macro modeling; Biaxial damage and failure experiments ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 4
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    Beitrag zur Entwicklung von Konstantflusspumpen für Frischbeton unter genauerer Betrachtung der Dickstoffventile (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: On almost every construction site, mobile fresh-concrete pumps of different designs can be found, all of which have an interruptions in delivery. In this work, a fresh-concrete constant-flow pump is developed and simulated. In order to be able to develop the new type of fresh-concrete valve required for this, knowledge is built up in a first step. This is done with a test bench using statistical design of experiments.
    Keywords: Konstantflusspumpe für Frischbeton ; Frischbetonventil ; statistische Versuchsplanung ; virtual Prototyping ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 5
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    Fundamentals for the Dimensioning and Optimization of Prestressed Segmented Girders for Application in Bridge Crane Systems (2022)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Bridge cranes are widely used as discontinuous material handling systems in industrial environments. The so-called crane bridge plays a central role in the overall construction. With increasing span widths and load capacities, the dimensions of the crane bridge also increase. The core of this work is the design and optimization of a new type of bridge crane system, which consists of individual segments and is eccentrically pretensioned by a tensile member.
    Keywords: Maschinenbau; Kranbau; Nichtlineare Optimierung; Mechanik; Mechanical Engineering; Crane construction; Nonlinear Optimization; Engineering mechanics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 6
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    Modellierung von Lithium-Ionen-Batterien zur Lebensdauerprädiktion unter besonderer Berücksichtigung des Anodenüberhangeffekts (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The focus of this work is on the modelling of the degradation behaviour of conventional lithium-ion cells with graphite/NMC electrodes in conjunction with electrolytes based on LiPF6 in organic solvents. The potential for improvements of parameterization methods dealing with physical-chemical aging effects and simulation studies for optimization of the battery lifetime is shown. In the process of model parameterization mostly data-based as well as non-invasive analysis methods are used.
    Keywords: Lithium-Ionen-Zelle ; Batterie ; Elektrofahrzeug ; Degradationsmechanismen ; Lebensdauerprädiktion ; lithium-ion cell ; battery ; electric vehicle ; degradation mechanism ; lifetime prediction ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 7
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    Assistenzsysteme zur Reduktion des Schädigungsverhaltens von Komponenten einer mobilen Arbeitsmaschine (2021)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: In this work, modular damage reduction assistance systems are investigated. Identification modules provide information about the current driving and working state, the machine operator, the bulk material mass and system parameters. Damage modules with complexity reduced calculation approaches allow a quantification of the machine damage. Possible applications and the potential of the assistance systems are demonstrated in a model-based development environment.
    Keywords: Assistenzsysteme ; Schädigungsreduktion ; Machine Learning ; Modellbasierte Entwicklung ; Radlader ; assistance systems ; damage reduction ; machine learning ; model-based development ; wheel loader ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 8
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    Process simulation of wet compression moulding for continuous fibre-reinforced polymers (2022)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Interdisciplinary development approaches for system-efficient lightweight design unite a comprehensive understanding of materials, processes and methods. This applies particularly to continuous fibre-reinforced plastics (CoFRPs), which offer high weight-specific material properties and enable load path-optimised designs. This thesis is dedicated to understanding and modelling Wet Compression Moulding (WCM) to facilitate large-volume production of CoFRP structural components.
    Keywords: Faserverbundkunststoffe; Nasspresstechnologie; Kohlefasergewebe; FEM-Methode; Abaqus; Fiber composite plastics; Wet compression molding; carbon fiber fabric; FEM ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 9
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    Ferromagnetische Inhomogenitäten zur berührungslosen Bestimmung der Geschwindigkeit und gleisselektiven Position von Schienenfahrzeugen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Ferromagnetic inhomogeneities along the track serve as landmarks. With these, each track section in the track network can be uniquely identified. In addition to non-contact speed determination, this also provides a track-selective method for determining the absolute position of the rail vehicle.
    Keywords: bordautonome Lokalisierung ; berührungslose Geschwindigkeitsmessung ; ferromagnetische Inhomogenitäten ; ferromagnetische Signaturen ; Schienenfahrzeug ; high accuracy velocity and position estimation ; ferromagnetic inhomogeneities ; ferromagnetic signatures ; rail vehicle ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 10
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    A computational multi-scale approach for brittle materials (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Materials of industrial interest often show a complex microstructure which directly influences their macroscopic material behavior. For simulations on the component scale, multi-scale methods may exploit this microstructural information. This work is devoted to a multi-scale approach for brittle materials. Based on a homogenization result for free discontinuity problems, we present FFT-based methods to compute the effective crack energy of heterogeneous materials with complex microstructures.
    Keywords: Effektive Rissenergie; FFT-basierte Homogenisierungsmethoden; Phasenfeld-Bruchmechanik; Minkowski-Tensoren; Fast-Marching-Methoden; Effective crack energy; FFT-based computational homogenization; Phase-field fracture; Minkowski tensors; Fast marching methods ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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