Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins
This paper describes experimental investigations on the in-plane tensile properties of unidirectional carbon-fibre/epoxy laminates reinforced with circumferentially notched z-pins with different notch designs. From the results it can be concluded that the application of circumferential notches at th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/4/2/78 |
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| author | André Knopp Gerhard Scharr |
| author_facet | André Knopp Gerhard Scharr |
| author_sort | André Knopp |
| collection | DOAJ |
| description | This paper describes experimental investigations on the in-plane tensile properties of unidirectional carbon-fibre/epoxy laminates reinforced with circumferentially notched z-pins with different notch designs. From the results it can be concluded that the application of circumferential notches at the z-pin surface with constant notch depth of 20 μm and distance of 100 μm has no significant effect on the in-plane tensile strength values, regardless of the notch designs investigated. For circular and rectangular notch designs, no dependence of the tensile strength from the notch depth could be observed. Only changing the notch distances at a constant notch depth and width leads to small increases in the tensile strength values with increasing notch distance. The determined tensile modulus values indicate that there are no substantial deviations between laminates reinforced with unnotched and circumferentially notched z-pins, no matter which notch design is considered. It can be observed that there are no dependencies of the tensile modulus from notch depth and distance. Therefore, it can be assumed that the microstructural changes influencing the in-plane tensile properties will not be changed, or only to a very small extent, by the presence of notches on the pin surface. |
| first_indexed | 2024-03-10T18:57:19Z |
| format | Article |
| id | doaj.art-7102e840cd0a40588ce812082976982f |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-10T18:57:19Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-7102e840cd0a40588ce812082976982f2023-11-20T04:40:05ZengMDPI AGJournal of Composites Science2504-477X2020-06-01427810.3390/jcs4020078Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-PinsAndré Knopp0Gerhard Scharr1Department of Mechanical Engineering and Marine Technology, Chair of Lightweight Design and Materials, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, GermanyDepartment of Mechanical Engineering and Marine Technology, Chair of Lightweight Design and Materials, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, GermanyThis paper describes experimental investigations on the in-plane tensile properties of unidirectional carbon-fibre/epoxy laminates reinforced with circumferentially notched z-pins with different notch designs. From the results it can be concluded that the application of circumferential notches at the z-pin surface with constant notch depth of 20 μm and distance of 100 μm has no significant effect on the in-plane tensile strength values, regardless of the notch designs investigated. For circular and rectangular notch designs, no dependence of the tensile strength from the notch depth could be observed. Only changing the notch distances at a constant notch depth and width leads to small increases in the tensile strength values with increasing notch distance. The determined tensile modulus values indicate that there are no substantial deviations between laminates reinforced with unnotched and circumferentially notched z-pins, no matter which notch design is considered. It can be observed that there are no dependencies of the tensile modulus from notch depth and distance. Therefore, it can be assumed that the microstructural changes influencing the in-plane tensile properties will not be changed, or only to a very small extent, by the presence of notches on the pin surface.https://www.mdpi.com/2504-477X/4/2/783-dimensional reinforcementZ-pin-reinforcementTensile mechanical propertiescircumferentially notched z-pins |
| spellingShingle | André Knopp Gerhard Scharr Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins Journal of Composites Science 3-dimensional reinforcement Z-pin-reinforcement Tensile mechanical properties circumferentially notched z-pins |
| title | Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins |
| title_full | Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins |
| title_fullStr | Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins |
| title_full_unstemmed | Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins |
| title_short | Tensile Properties of Z-Pin Reinforced Laminates with Circumferentially Notched Z-Pins |
| title_sort | tensile properties of z pin reinforced laminates with circumferentially notched z pins |
| topic | 3-dimensional reinforcement Z-pin-reinforcement Tensile mechanical properties circumferentially notched z-pins |
| url | https://www.mdpi.com/2504-477X/4/2/78 |
| work_keys_str_mv | AT andreknopp tensilepropertiesofzpinreinforcedlaminateswithcircumferentiallynotchedzpins AT gerhardscharr tensilepropertiesofzpinreinforcedlaminateswithcircumferentiallynotchedzpins |