Materiell Nichtlineare Kontinuumsmodellierung Ferroelektrischer Funktionskeramiken Mit Piezoelektrischen Und Flexoelektrischen Eigenschaften
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Materiell Nichtlineare Kontinuumsmodellierung Ferroelektrischer Funktionskeramiken Mit Piezoelektrischen Und Flexoelektrischen Eigenschaften
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Author : Sutter, Felix
language : de
Publisher: KIT Scientific Publishing
Release Date : 2024-03-15
Materiell Nichtlineare Kontinuumsmodellierung Ferroelektrischer Funktionskeramiken Mit Piezoelektrischen Und Flexoelektrischen Eigenschaften written by Sutter, Felix and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-15 with categories.
Die vorliegende Arbeit beschäftigt sich mit der Entwicklung eines makroskopischen Kontinuumsmodells zur Untersuchung des Einflusses des flexoelektrischen Effekts auf mikrostrukturelle Domänenumklappprozesse in ferroelektrischen Funktionskeramiken. Dabei ist von Interesse, ob in Piezokeramiken durch direkte Flexoelektrizität ein Polungsprozess in Gang gesetzt werden kann und ob durch indirekte Flexoelektrizität eine Verbesserung der aktorischen Eigenschaften eines IDE-Wafers möglich ist. - The present work deals with the development of a macroscopic continuum model to investigate the influence of the flexoelectric effect on microstructural domain switching processes in ferroelectric ceramics. It is of interest whether direct flexoelectricity can initiate a poling process in piezoceramics and if indirect flexoelectricity can improve the actuator performance of an IDE wafer.
Materiell Nichtlineare Kontinuumsmodellierung Ferroelektrischer Funktionskeramiken Mit Piezoelektrischen Und Flexoelektrischen Eigenschaften
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Author : Felix Sutter
language : de
Publisher:
Release Date : 2023*
Materiell Nichtlineare Kontinuumsmodellierung Ferroelektrischer Funktionskeramiken Mit Piezoelektrischen Und Flexoelektrischen Eigenschaften written by Felix Sutter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023* with categories.
Multiscale Modeling Of Curing And Crack Propagation In Fiber Reinforced Thermosets
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Author : Schöller, Lukas
language : en
Publisher: KIT Scientific Publishing
Release Date : 2024-03-15
Multiscale Modeling Of Curing And Crack Propagation In Fiber Reinforced Thermosets written by Schöller, Lukas and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-15 with categories.
During the production of fiber-reinforced thermosets, the resin material undergoes a reaction that can lead to damage. A two-stage polymerization reaction is modeled using molecular dynamics and evaluations of the system including a fiber surface are performed. In addition, a phase-field model for crack propagation in heterogeneous systems is derived. This model is able to predict crack growth where established models fail. Finally, the model is used to predict crack formation during curing.
Phase Field Modeling Of Phase Changes And Mechanical Stresses In Electrode Particles Of Secondary Batteries
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Author : Zhang, Tao
language : en
Publisher: KIT Scientific Publishing
Release Date : 2021-09-27
Phase Field Modeling Of Phase Changes And Mechanical Stresses In Electrode Particles Of Secondary Batteries written by Zhang, Tao and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-27 with Technology & Engineering categories.
Most storage materials exhibit phase changes, which cause stresses and, thus, lead to damage of the electrode particles. In this work, a phase-field model for the cathode material NaxFePO4 of Na-ion batteries is studied to understand phase changes and stress evolution. Furthermore, we study the particle size and SOC dependent miscibility gap of the nanoscale insertion materials. Finally, we introduce the nonlocal species concentration theory, and show how the nonlocality influences the results.
Simulation Of The Thermoforming Process Of Ud Fiber Reinforced Thermoplastic Tape Laminates
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Author : Dörr, Dominik
language : en
Publisher: KIT Scientific Publishing
Release Date : 2021-10-29
Simulation Of The Thermoforming Process Of Ud Fiber Reinforced Thermoplastic Tape Laminates written by Dörr, Dominik and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-29 with Technology & Engineering categories.
In this work, initially, the requirements on a simulation model of the non-isothermal stamp forming process of unidirectional fiber-reinforced, and thermoplastic tape laminates are investigated experimentally. On this basis, different isothermal as well as a fully coupled thermomechanical simulation model under consideration of the crystallization kinetics are developed. For validation, a complex shaped geometry is simulated and compared to experimental forming results.