Date
2023-11-23Subject
620 Engineering 660 Chemical engineering Induktive ErwärmungProzessentwicklung <Technik>Ultrahochfester BetonMemory-LegierungFaserUmwandlungsenthalpieMetadata
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Aufsatz
Latent heat effects in inductive heating of shape memory alloy fibers
Abstract
Motivation of the present work is an inductive heating process, used in manufacturing a new kind of improved ultra-high performance concrete. In this novel material, fibers made out of shape memory alloys are used to increase the maximum possible fiber volume fraction, or to create an internal state of compressive stress. In contrast to other works, the underlying microstructure transformation from martensite to austenite is highlighted based on thermal analysis. Dynamic scanning calorimetry measurements are adapted as basis for development of a phenomenological phase transformation model. It relates local temperature and temperature rate to the rate of change of the phase indicator, modeling the transformation of martensite to austenite. Latent heat is considered by an enthalpy method, the inductive heating process is considered by a phenomenological model. Study results for a purely thermodynamic process of heating a single fiber embedded in concrete are presented. They show that latent heat effects delay phase transformation and the process of fiber activation is very sensitive to the induced heat. Furthermore, it is discovered that latent heat causes a strongly inhomogeneous state of transformation in radial direction of the fiber, which is of great importance for thermomechanical processes and the interpretation of experimental results.
Citation
In: Proceedings in Applied Mathematics and Mechanics (PAMM) Volume 23 / Issue 4 (2023-11-23) eissn:1617-7061Sponsorship
Gefördert im Rahmen des Projekts DEALCitation
@article{doi:10.17170/kobra-202401039314,
author={Descher, Stefan and Krooß, Philipp and Ewald, Felix and Wolf, Sebastian and Kuhl, Detlef},
title={Latent heat effects in inductive heating of shape memory alloy fibers},
journal={Proceedings in Applied Mathematics and Mechanics (PAMM)},
year={2023}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2023$n2023 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/15353 3000 Descher, Stefan 3010 Krooß, Philipp 3010 Ewald, Felix 3010 Wolf, Sebastian 3010 Kuhl, Detlef 4000 Latent heat effects in inductive heating of shape memory alloy fibers / Descher, Stefan 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/15353=x R 4204 \$dAufsatz 4170 5550 {{Induktive Erwärmung}} 5550 {{Prozessentwicklung <Technik>}} 5550 {{Ultrahochfester Beton}} 5550 {{Memory-Legierung}} 5550 {{Faser}} 5550 {{Umwandlungsenthalpie}} 7136 ##0##http://hdl.handle.net/123456789/15353
2024-01-08T13:11:57Z 2024-01-08T13:11:57Z 2023-11-23 doi:10.17170/kobra-202401039314 http://hdl.handle.net/123456789/15353 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 620 660 Latent heat effects in inductive heating of shape memory alloy fibers Aufsatz Motivation of the present work is an inductive heating process, used in manufacturing a new kind of improved ultra-high performance concrete. In this novel material, fibers made out of shape memory alloys are used to increase the maximum possible fiber volume fraction, or to create an internal state of compressive stress. In contrast to other works, the underlying microstructure transformation from martensite to austenite is highlighted based on thermal analysis. Dynamic scanning calorimetry measurements are adapted as basis for development of a phenomenological phase transformation model. It relates local temperature and temperature rate to the rate of change of the phase indicator, modeling the transformation of martensite to austenite. Latent heat is considered by an enthalpy method, the inductive heating process is considered by a phenomenological model. Study results for a purely thermodynamic process of heating a single fiber embedded in concrete are presented. They show that latent heat effects delay phase transformation and the process of fiber activation is very sensitive to the induced heat. Furthermore, it is discovered that latent heat causes a strongly inhomogeneous state of transformation in radial direction of the fiber, which is of great importance for thermomechanical processes and the interpretation of experimental results. open access Descher, Stefan Krooß, Philipp Ewald, Felix Wolf, Sebastian Kuhl, Detlef doi:10.1002/pamm.202300300 Induktive Erwärmung Prozessentwicklung <Technik> Ultrahochfester Beton Memory-Legierung Faser Umwandlungsenthalpie publishedVersion eissn:1617-7061 Issue 4 Proceedings in Applied Mathematics and Mechanics (PAMM) Volume 23 false e202300300
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