Kalorik in ferroelektrischen Werkstoffen – von der Variationsformulierung zur Modellierung und Simulation

Wingen, Marius

dc.date.accessioned	2022-01-14T07:38:33Z
dc.date.available	2022-01-14T07:38:33Z
dc.date.issued	2021
dc.identifier	doi:10.17170/kobra-202112145254
dc.identifier.uri	http://hdl.handle.net/123456789/13517
dc.description	Zugleich: Dissertation, Universität Kassel, 2021
dc.language.iso	ger
dc.publisher	kassel university press
dc.rights	Namensnennung 4.0 International	*
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	*
dc.subject	Ferroelektrika	ger
dc.subject	Kalorik	ger
dc.subject	Thermo-ferroelektrisches Materialverhalten	ger
dc.subject	Variationsformulierung	ger
dc.subject	Mehrfeldprobleme	ger
dc.subject	Modellierung und Simulation	ger
dc.subject	Leistungsbilanz	ger
dc.subject.ddc	600
dc.title	Kalorik in ferroelektrischen Werkstoffen – von der Variationsformulierung zur Modellierung und Simulation	ger
dc.type	Buch
dcterms.abstract	Ferroelectric materials are nowadays used in many areas due to their special electro-mechanical properties. Since their material properties are partly strongly dependent on temperature and the temperature can have a decisive influence on the reliability and life time of ferroelectric components, caloric aspects have increasingly been investigated in recent years, not least because the electrocaloric effect is suitable for solid-state refrigeration. The thesis deals with the modeling and simulation of nonlinear thermo-ferroelectric material behavior. The focus is particularly on the modeling of temperature changes due to domain wall motion in the material and its numerical implementation. To establish a corresponding numerical discretization scheme, a weak form has to be derived, which conatins the constitutive and balance equations of dissipative thermo-electro-magneto-mechanical multi-field problems. The method of weighted residuals is usually used for this purpose, since a classical functional of caloric and electrodynamic problems, as a prerequisite for a cariational approach, is not known. Deficiencies lie in the different units, which, in contrast to mechanical stress, electric displacement and magnetic field, intrinsically involve time rates in the fluxes of heat and electrical current. By combining classical variational principles, i.e. Hamilton’s and Jourdain’s principles, and introducing a heat and a charge flux potential, a modified variational principle is introduced and referred to as the principle of Hamilton-Jourdain. Based on the weak formulation, an algebraic system of equations is finally set up and implemented together with the thermo-electro-mechanical constitutive model into a commercial finite element software, which is finally used to numerically solve various boundary value problems.	eng
dcterms.accessRights	open access
dcterms.creator	Wingen, Marius
dcterms.dateAccepted	2021-05-2021
dcterms.extent	xvi, A5
dc.contributor.corporatename	Kassel, Universität Kassel, Fachbereich Maschinenbau
dc.contributor.referee	Ricoeur, Andreas (Prof. Dr.)
dc.contributor.referee	Kästner, Markus (Prof. Dr.)
dc.publisher.place	Kassel
dc.relation.isbn	978-3-7376-1006-3
dc.subject.swd	Thermodynamik	ger
dc.subject.swd	Ferroelektrikum	ger
dc.subject.swd	Werkstoff	ger
dc.subject.swd	Stoffeigenschaft	ger
dc.subject.swd	Leistungsbilanz	ger
dc.subject.swd	Mehrfeldproblem	ger
dc.subject.swd	Modellierung	ger
dc.subject.swd	Simulation	ger
dc.type.version	publishedVersion
dcterms.source.series	Berichte des Instituts für Mechanik
dcterms.source.volume	Bericht 4/2021
kup.iskup	true
kup.price	39,00
kup.series	Berichte des Instituts für Mechanik	ger
kup.subject	Naturwissenschaft, Technik, Informatik, Medizin	ger
kup.typ	Dissertation
kup.institution	FB 15 / Maschinenbau
kup.binding	Softcover
kup.size	DIN A5
ubks.epflicht	true