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Experimental and Numerical Determination of the Local Fiber Volume Content of Unidirectional Non-Crimp Fabrics with Forming Effects

1
Karlsruhe Institute of Technology (KIT), Institute of Vehicle System Technology, Lightweight Technology (LBT), Rintheimer Querallee 2, D-76131 Karlsruhe, Germany
2
Institute of Lightweight Engineering and Polymer Technology, Technical University Dresden, D-01307 Dresden, Germany
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(1), 19; https://doi.org/10.3390/jcs3010019
Received: 18 January 2019 / Revised: 8 February 2019 / Accepted: 10 February 2019 / Published: 14 February 2019
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Abstract

Detailed knowledge of the local fiber orientation and the local fiber volume content within composite parts provides an opportunity to predict the structural behavior more reliably. Utilizing forming simulation methods of dry or pre-impregnated fabrics allows for predicting the local fiber orientation. Additionally, during the forming process, so-called draping effects like waviness, gapping or shear-induced transverse compression change the local fiber volume content. To reproduce and investigate such draping effects, different manufacturing tools have been developed in this work. The tools are used to create fabric samples with pre-defined deformation states, representing the different draping effects. The samples are evaluated regarding the resulting fiber volume content. The experimental results are compared with the predictions of an analytical solution and of a numerical solution based on draping simulation results. Furthermore, the interaction of the draping effects at arbitrary strain states is discussed regarding the resulting fiber volume content. View Full-Text
Keywords: draping effects; fiber deformation; process simulation; preforming; fiber volume content; waviness; gapping; shearing draping effects; fiber deformation; process simulation; preforming; fiber volume content; waviness; gapping; shearing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Galkin, S.; Kunze, E.; Kärger, L.; Böhm, R.; Gude, M. Experimental and Numerical Determination of the Local Fiber Volume Content of Unidirectional Non-Crimp Fabrics with Forming Effects. J. Compos. Sci. 2019, 3, 19.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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