Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures
Bending is one of the dominant material deformation mechanisms that occurs during the forming process of unidirectional (UD) thermoplastic tapes. Experimental characterization of the bending behavior at processing temperatures is crucial to obtaining close-to-reality data sets for process analysis o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/16/3/425 |
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| author | Daniel Laresser Matei-Constantin Miron Milan Kracalik Felix Baudach Zoltán Major |
| author_facet | Daniel Laresser Matei-Constantin Miron Milan Kracalik Felix Baudach Zoltán Major |
| author_sort | Daniel Laresser |
| collection | DOAJ |
| description | Bending is one of the dominant material deformation mechanisms that occurs during the forming process of unidirectional (UD) thermoplastic tapes. Experimental characterization of the bending behavior at processing temperatures is crucial to obtaining close-to-reality data sets for process analysis or material modeling for process simulation. The main purpose of this study is to characterize to a high degree of accuracy the temperature-dependent bending behavior of single and multi-ply specimens of carbon fiber-reinforced polycarbonate (PC/CF) UD tapes at processing temperatures, which implies a molten state of the thermoplastic matrix. The application of the rotation bending test using a customized fixture may come with systematic deviations in the measured moment that result from a pivot offset or an effective clearance that is unknown under realistic test conditions. The present research analyzes these effects with analytical methods, experimental investigations, and simulations using a finite element model. In this context, a compensation method for the toe-in effect is evaluated. With this approach, we were able to obtain reliable data and characterize the bending resistance within the desired processing window. The data reveal a major drop in bending resistance between 200 °C and 250 °C and a less significant decrease between 250 °C and 300 °C. Analysis of the thickness-normalized bending resistances indicates a non-linear relationship between specimen thickness and measured moment but an increasing shear-dominated characteristic at higher temperatures. |
| first_indexed | 2024-03-08T03:49:35Z |
| format | Article |
| id | doaj.art-32e5b2d87f834b90855526bad6c41c9b |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-08T03:49:35Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-32e5b2d87f834b90855526bad6c41c9b2024-02-09T15:21:01ZengMDPI AGPolymers2073-43602024-02-0116342510.3390/polym16030425Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing TemperaturesDaniel Laresser0Matei-Constantin Miron1Milan Kracalik2Felix Baudach3Zoltán Major4Competence Center CHASE GmbH, Hafenstraße 47-51, 4020 Linz, AustriaCompetence Center CHASE GmbH, Hafenstraße 47-51, 4020 Linz, AustriaInstitute of Polymer Science, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaCovestro Deutschland AG, B207, R428, 51365 Leverkusen, GermanyInstitute of Polymer Product Engineering, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, AustriaBending is one of the dominant material deformation mechanisms that occurs during the forming process of unidirectional (UD) thermoplastic tapes. Experimental characterization of the bending behavior at processing temperatures is crucial to obtaining close-to-reality data sets for process analysis or material modeling for process simulation. The main purpose of this study is to characterize to a high degree of accuracy the temperature-dependent bending behavior of single and multi-ply specimens of carbon fiber-reinforced polycarbonate (PC/CF) UD tapes at processing temperatures, which implies a molten state of the thermoplastic matrix. The application of the rotation bending test using a customized fixture may come with systematic deviations in the measured moment that result from a pivot offset or an effective clearance that is unknown under realistic test conditions. The present research analyzes these effects with analytical methods, experimental investigations, and simulations using a finite element model. In this context, a compensation method for the toe-in effect is evaluated. With this approach, we were able to obtain reliable data and characterize the bending resistance within the desired processing window. The data reveal a major drop in bending resistance between 200 °C and 250 °C and a less significant decrease between 250 °C and 300 °C. Analysis of the thickness-normalized bending resistances indicates a non-linear relationship between specimen thickness and measured moment but an increasing shear-dominated characteristic at higher temperatures.https://www.mdpi.com/2073-4360/16/3/425bendingunidirectional tapehigh temperaturethermoplastic compositepolycarbonate |
| spellingShingle | Daniel Laresser Matei-Constantin Miron Milan Kracalik Felix Baudach Zoltán Major Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures Polymers bending unidirectional tape high temperature thermoplastic composite polycarbonate |
| title | Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures |
| title_full | Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures |
| title_fullStr | Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures |
| title_full_unstemmed | Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures |
| title_short | Analysis of the Rotation Bending Test Method and Characterization of Unidirectional Carbon Fiber-Reinforced Polycarbonate Tapes at Processing Temperatures |
| title_sort | analysis of the rotation bending test method and characterization of unidirectional carbon fiber reinforced polycarbonate tapes at processing temperatures |
| topic | bending unidirectional tape high temperature thermoplastic composite polycarbonate |
| url | https://www.mdpi.com/2073-4360/16/3/425 |
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