Publikationen
Im Folgenden finden Sie eine Liste von Veröffentlichungen der Fa. Textechno. Wenn Sie den gesamten Artikel lesen möchten, wenden Sie sich bitte gerne mit Hilfe des Kontaktformulars an uns.
Measurement of interfacial shear strength by means of micromechanical single-fibre pull-out tests
S. Fliescher, M. Khalid, E. Ingelsberger – Textechno Herbert Stein GmbH & Co. KG
A. Drieling – Faserinstitut Bremen e. V.
B. Leitner, J. Faustmann, F. Manis – Fraunhofer IGCV
S. Sauze, M. Mahmoudi, F. Goetmann – Extracthive SAS
Proceedings of the SAMPE Europe Conference 2024, 24th – 26th September 2024, Belfast
Full article: https://doi.org/10.24406/h-478054
Interfacial shear strength (IFSS) is one of the key parameters in composite technology. To characterize it, most commonly composites with unidirectionally aligned fibres are manufactured: A transverse tensile test or a short beam shear strength test is then performed to measure the apparent interlaminary shear strength (ILSS). However, the maximum stress found in such macromechanical tests is also governed by various additional factors coming from the preparation of the test samples.
Here, the single-fibre pull-out (as implemented in Textechno’s FIMATEST System) test has several advantages. By involving only single fibres in the test, most dependencies on the manufacturing process of the test specimen are avoided. The single-fibre pull-out test not only determines the apparent, but for instance also the local interfacial shear strength, which is essential for applications with cyclic load. Fast and effective micromechanical testing of the interfacial shear strength has recently been standardized as DIN SPEC 19289.
This paper describes the pull-out test in general and shows results for the interfacial shear strength of common thermoset matrix materials to carbon and glass fibres. In addition, the paper gives an example for the application of the SFPO test for the characterization of recycled carbon fibres, coming from a solvolysis process.
Standardizing the Single-Fibre Pull-Out Test for Fibre-Matrix Adhesion Characterization: Method and Insights
B. Leitner, F. Manis, S. Özcelik – Fraunhofer IGCV
C. Poitzsch, M. Khalid, E. Ingelsberger, S. Fliescher – Textechno Herbert Stein GmbH & Co. KG
A. Drieling, P. Hartwig, E. Dederer – Faserinstitut Bremen e. V.
Proceedings of the 6th International Conference and Exhibition on Thermoplastic Composites, ITHEC 2022.
The standardization of the micromechanical single-fibre pull-out test is urgently requested by the industry. The corresponding DIN SPEC 19289 “Fibre-reinforced Composites – Measurement of Interfacial Shear Strength by means of a Micromechanical Single-Fibre Pull-Out Test” was recently published within the scope of the publicly funded WIPANO project “WiPull”, which was conducted between the partners Fraunhofer IGCV, Faserinstitut Bremen and Textechno. This project also included testing of the most relevant thermoplastic matrices like PA6, PP, PEEK and PC in combination with carbon fibres, recycled carbon fibres, glass, and natural fibres. This paper includes key findings of the WiPull project including the impact of tempering, ageing, degradation, and temperature profiles on the measured fibre-matrix adhesion strength. Furthermore, results of the round robin trials are shown and discussed.
Find the full article here: https://publica.fraunhofer.de/entities/publication/b7311687-804d-4d96-b6ef-39684c834d56/details
Investigation of interfacial strength parameters in polymer matrix composites: Compatibility and reproducibility
Effects of various geometrical and physical factors, as well as the method of data reduction (analysis of experimental force–displacement curves) on the values of local interfacial strength parameters (local IFSS, τd, and critical energy release rate, Gic) determined by means of a single fiber pull-out test are discussed.
Serge Zhandarov, Edith Mäder, Christina Scheffler, Gerhard Kalinka, Claudia Poitzsch, Stefan Fliescher
Advanced Industrial and Engineering Polymer Research, Volume 1, Issue 1,2018, Pages 82-92
FIMATEST – A New Testing System to Determine the Fibre-Matrix Adhesion Strength by Means of Pull-Out Tests
Textechno has a focus on the development of instruments for the characterization of the physical properties of reinforcement fibers, rovings and the fiber-matrix adhesion. We discuss in detail the measurement of the fiber-matrix adhesion strength by means of the FIMATEST system which has been developed together two research institutes, the Leibniz-Institut für Polymerforschung (IPF) in Dresden and the Faserinstitut Bremen (FIBRE). Mehr erfahren…
FIMATEST – Qualitätsmessung an Verbundwerkstoffen
JEC Composites Magazine No. 102, 2016, 49-51
Die Glas- und Carbonfaserindustrie setzt ihr schnelles Wachstum fort und erschließt immer neue Anwendungsgebiete. Eine Schlüsselgröße für hochqualitative Verbundwerkstoffe ist die Stärke der Haftung zwischen Faser und Matrix. Dieser Artikel beschreibt verschiedene Methoden und messtechnische Lösungen mit deren Hilfe ein hohes Niveau der Faser-Matrix Haftung erreicht und sichergestellt werden kann.
Testing of Carbon Fibers
The importance of carbon fibers as a reinforcement material in energy-saving lightweight composites is well accepted. Fast and reliable, i.e. automated, linear-density- and tensile testing of carbon fibers thus becomes increasingly important. Due to the special properties of carbon fibers an automatic handling of individual filaments has been considered to be problematic. TEXTECHNO in Mönchengladbach realizes an automated test of linear-density- and tensile properties on such carbon filaments in their automatic fiber test system FAVIMAT+ with ROBOT 2.
Mehr erfahren…