Datum
2019-11-01Schlagwort
620 Ingenieurwissenschaften 660 Chemische Verfahrenstechnik, Technische Chemie EigenverstärkungVerbundwerkstoffTemperaturleitfähigkeitAnisotropieMechanische EigenschaftMetadata
Zur Langanzeige
Aufsatz
Characterization of Anisotropic Properties of Hot Compacted Self-Reinforced Composites (SRCs) via Thermal Diffusivity Measurement
Zusammenfassung
The mechanical properties of self-reinforced composites (SRCs) produced in a hot compaction process significantly depend on the process parameters. Only a little deviation of the process temperature or pressure causes the component to act differently under mechanical load. This is a chance and a challenge at the same time, since this process is difficult to handle but by properly controlling the process parameters, the mechanical properties can be adjusted, even locally for one component. In this research SRC are manufactured in a hot compaction process. A correlation between process parameters and density is found. Density increased from 0,8 to 0,91 g/cm³ by increasing temperature and pressure in the hot compaction process. The different thermal properties in the direction of orientation (IP) and transverse to orientation (TP) are measured with a laser flash device. It was found that, due to a change in density and molecular orientation, diffusivity and conductivity are influenced in different degrees in IP and TP directions. For interpretation of thermal measurement results, microstructures are analysed with a confocal laser scanning microscope after preparing the specimen with a permanganate etching. A schematic model of conductive path is worked out and discussed. With measurement data the anisotropy of IP and TP diffusivity is calculated, and a model is built to describe relative density related to anisotropy. The highest anisotropy between IP and TP diffusivity was calculated with a ratio of 6 at a relative density of approximately 0,82 g/cm³. Since mechanical properties in correlation to process parameters have already been investigated, results of this investigation, in combination with previous research on mechanical properties, will enable the development of a non-destructive testing method for SRCs by measuring the thermal diffusivity.
Zitierform
In: International Polymer Processing Band 34 / Heft 5 (2019-11-01) , S. 532-540 ; eissn:2195-8602Zusätzliche Informationen
Originally published at https://doi.org/10.3139/217.3812Zitieren
@article{doi:10.17170/kobra-202404119975,
author={Heim, Hans-Peter and Mieth, Florian and Jakob, Fabian Simon and Schnau, M.},
title={Characterization of Anisotropic Properties of Hot Compacted Self-Reinforced Composites (SRCs) via Thermal Diffusivity Measurement},
journal={International Polymer Processing},
year={2019}
}
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2024-06-03T09:59:10Z 2024-06-03T09:59:10Z 2019-11-01 doi:10.17170/kobra-202404119975 http://hdl.handle.net/123456789/15805 Originally published at https://doi.org/10.3139/217.3812 eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ 620 660 Characterization of Anisotropic Properties of Hot Compacted Self-Reinforced Composites (SRCs) via Thermal Diffusivity Measurement Aufsatz The mechanical properties of self-reinforced composites (SRCs) produced in a hot compaction process significantly depend on the process parameters. Only a little deviation of the process temperature or pressure causes the component to act differently under mechanical load. This is a chance and a challenge at the same time, since this process is difficult to handle but by properly controlling the process parameters, the mechanical properties can be adjusted, even locally for one component. In this research SRC are manufactured in a hot compaction process. A correlation between process parameters and density is found. Density increased from 0,8 to 0,91 g/cm³ by increasing temperature and pressure in the hot compaction process. The different thermal properties in the direction of orientation (IP) and transverse to orientation (TP) are measured with a laser flash device. It was found that, due to a change in density and molecular orientation, diffusivity and conductivity are influenced in different degrees in IP and TP directions. For interpretation of thermal measurement results, microstructures are analysed with a confocal laser scanning microscope after preparing the specimen with a permanganate etching. A schematic model of conductive path is worked out and discussed. With measurement data the anisotropy of IP and TP diffusivity is calculated, and a model is built to describe relative density related to anisotropy. The highest anisotropy between IP and TP diffusivity was calculated with a ratio of 6 at a relative density of approximately 0,82 g/cm³. Since mechanical properties in correlation to process parameters have already been investigated, results of this investigation, in combination with previous research on mechanical properties, will enable the development of a non-destructive testing method for SRCs by measuring the thermal diffusivity. open access Heim, Hans-Peter Mieth, Florian Jakob, Fabian Simon Schnau, M. doi:10.3139/217.3812 Eigenverstärkung Verbundwerkstoff Temperaturleitfähigkeit Anisotropie Mechanische Eigenschaft publishedVersion eissn:2195-8602 Heft 5 International Polymer Processing 532-540 Band 34 false
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