Wissel, Sebastian (2023)
Determination of effective electric conductivity of UFG/PEI-composites considering quantum mechanical tunnelling effects.
Technische Universität Darmstadt
doi: 10.26083/tuprints-00023035
Masterarbeit, Erstveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
The increased utilization of composite materials in recent years and concomitant struggles in optimizing their properties while avoiding unrequested properties directed attention to accurate material design. Due to their cost efficiency in parameter studies, Finite Element (FE) simulation could play an important role, if appropriate material models are evolved. In this work, quantum mechanical tunnelling is implemented as a user element in numerical simulations to investigate the electric properties of a composite of insulating matrix material (polyetherimide) and conducting spherical inclusions (exfoliated, unfunctionalized graphite). While the algorithm's functionality is proven by accordance with determined correlation length exponents with theoretical literature values, the utilization of a homogenization technique leads to reasonable effective conductivities of the composite material acknowledging the quality of the algorithm.
| Typ des Eintrags: | Masterarbeit |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Wissel, Sebastian |
| Art des Eintrags: | Erstveröffentlichung |
| Titel: | Determination of effective electric conductivity of UFG/PEI-composites considering quantum mechanical tunnelling effects |
| Sprache: | Englisch |
| Referenten: | Xu, Prof. Dr. Bai-Xiang ; Zhang, Prof. Dr. Hongbin |
| Publikationsjahr: | 2023 |
| Ort: | Darmstadt |
| Kollation: | 48 Seiten |
| Datum der mündlichen Prüfung: | 16 September 2021 |
| DOI: | 10.26083/tuprints-00023035 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23035 |
| Kurzbeschreibung (Abstract): | The increased utilization of composite materials in recent years and concomitant struggles in optimizing their properties while avoiding unrequested properties directed attention to accurate material design. Due to their cost efficiency in parameter studies, Finite Element (FE) simulation could play an important role, if appropriate material models are evolved. In this work, quantum mechanical tunnelling is implemented as a user element in numerical simulations to investigate the electric properties of a composite of insulating matrix material (polyetherimide) and conducting spherical inclusions (exfoliated, unfunctionalized graphite). While the algorithm's functionality is proven by accordance with determined correlation length exponents with theoretical literature values, the utilization of a homogenization technique leads to reasonable effective conductivities of the composite material acknowledging the quality of the algorithm. |
| Freie Schlagworte: | Finite Element Method, quantum mechanical tunnelling, effective conductivity, composite, correlation length exponent |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-230351 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien |
| Hinterlegungsdatum: | 26 Mai 2023 11:32 |
| Letzte Änderung: | 30 Mai 2023 05:11 |
| PPN: | |
| Referenten: | Xu, Prof. Dr. Bai-Xiang ; Zhang, Prof. Dr. Hongbin |
| Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 16 September 2021 |
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