Capabilities and limitations of pure-shear based macroscopic forming simulations for 0°/90° biaxial non-crimp fabrics
Bastian Schäfer, Dominik Dörr, Naim Naouar, Jan Paul Wank, Luise Kärger
Abstract. Macroscopic modeling of a non-crimp fabric’s (NCF’s) forming behavior is challenging as it strongly depends on the textile architecture, fiber type, and stitching type. While shear is the main deformation mode of woven fabrics, membrane modeling approaches for NCFs should also consider stitching deformation and roving slippage. However, for 0°/90° biaxial NCFs (Biax-NCF) with a symmetrical stitching pattern and high stitch pretension, deviations from a pure-shear assumption in coupon tests are only observed at higher shear angles due to limited roving slippage. In this work, a hyperelastic approach initially proposed for unidirectional NCFs is adopted for a tricot stitched 0°/90° Biax-NCF based on a pure-shear assumption. The shear behavior is experimentally characterized through 45° off-axis-tension tests, and the parameterization is derived from energetic approaches originally developed for woven fabrics. This approach efficiently and adequately describes the general behavior in forming simulations of different geometries. Fiber orientation and location of areas with high shear angles are predicted well, but the peak shear angles are overestimated due to the neglected roving slippage.
Keywords
Fabrics/textiles, Biaxial Non-Crimp Fabric, Biax-NCF, Process Simulation, Forming
Published online 5/7/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Bastian Schäfer, Dominik Dörr, Naim Naouar, Jan Paul Wank, Luise Kärger, Capabilities and limitations of pure-shear based macroscopic forming simulations for 0°/90° biaxial non-crimp fabrics, Materials Research Proceedings, Vol. 54, pp 554-563, 2025
DOI: https://doi.org/10.21741/9781644903599-60
The article was published as article 60 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] Quenzel P, Kröger H, Manin B, Ngoc Vu K, Duong TX, Gries T, et al. Material characterisation of biaxial glass-fibre non-crimp fabrics as a function of ply orientation, stitch pattern, stitch length and stitch tension. Journal of Composite Materials 2022;56:3971–91. https://doi.org/10.1177/00219983221127005
[2] Ghazimoradi M, Montesano J. Macroscopic Forming Simulation for a Unidirectional Non-crimp Fabric Using an Anisotropic Hyperelastic Material Model. Appl Compos Mater 2023;55:171. https://doi.org/10.1007/s10443-023-10158-0
[3] Schäfer B, Dörr D, Zheng R, Naouar N, Kärger L. A hyperelastic approach for modeling the membrane behavior in finite element forming simulation of unidirectional non-crimp fabrics (UD-NCF). Comp. Part A 185 (2024) 108359. https://doi.org/10.1016/j.compositesa.2024.108359
[4] Mei M, He Y, Yang X, Wei K, Qu Z, Fang D. Shear deformation characteristics and defect evolution of the biaxial ±45° and 0/90° glass non-crimp fabrics. Composites Science and Technology 2020;193:108137. https://doi.org/10.1016/j.compscitech.2020.108137
[5] Yu W-R, Harrison P, Long A. Finite element forming simulation for non-crimp fabrics using a non-orthogonal constitutive equation. Composites Part A: Applied Science and Manufacturing 2005;36:1079–93. https://doi.org/10.1016/j.compositesa.2005.01.007
[6] Chen S, McGregor OPL, Harper LT, Endruweit A, Warrior NA. Defect formation during preforming of a bi-axial non-crimp fabric with a pillar stitch pattern. Comp. Part A 91 (2016) 156–67. https://doi.org/10.1016/j.compositesa.2016.09.016
[7] Deghboudj S, Boukhedena W, Satha H. Experimental and finite element analysis of in-plane shear properties of a carbon non-crimp fabrics at macroscopic scale. Journal of Composite Materials 2018;52:235–44. https://doi.org/10.1177/0021998317704982
[8] Yu F, Chen S, Viisainen JV, Sutcliffe MPF, Harper LT, Warrior NA. A macroscale finite element approach for simulating the bending behaviour of biaxial fabrics. Composite Science and Technology 2020;191. https://doi.org/10.1016/j.compscitech.2020.108078
[9] Bel S, Hamila N, Boisse P, Dumont F. Finite element model for NCF composite reinforcement preforming: Importance of inter-ply sliding. Comp. Part A 43 (2012) 2269–77. https://doi.org/10.1016/j.compositesa.2012.08.005
[10] Mallach A, Härtel F, Heieck F, Fuhr J-P, Middendorf P, Gude M. Experimental comparison of a macroscopic draping simulation for dry non-crimp fabric preforming on a complex geometry by means of optical measurement. Journal of Composite Materials 2017;51:2363–75. https://doi.org/10.1177/0021998316670477
[11] Jagpal R, Evangelou E, Butler R, Loukaides EG. Preforming of non-crimp fabrics with distributed magnetic clamping and Bayesian optimisation. Journal of Composite Materials 2022;56:2835–54. https://doi.org/10.1177/00219983221103637
[12] Schäfer B, Zheng R, Naouar N, Kärger L. Membrane behavior of uni- and bidirectional non-crimp fabrics in off-axis-tension tests. Int. J. of Mat. Form 16 (2023) 68. https://doi.org/10.1007/s12289-023-01792-x
[13] Schäfer B. Macroscopic forming simulation of unidirectional non-crimp fabrics: Hyperelastic material modeling and 3D-solid-shell approach. Dissertation. Karlsruhe Institute of Technology (KIT), 2024. https://doi.org/10.5445/IR/1000170739
[14] Boisse P, Hamila N, Guzman-Maldonado E, Madeo A, Hivet G, dell’Isola F. The bias-extension test for the analysis of in-plane shear properties of textile composite reinforcements and prepregs: a review. International Journal of Material Forming 2016;10:473–92. https://doi.org/10.1007/s12289-016-1294-7
[14] Hamila N, Boisse P. Locking in simulation of composite reinforcement deformations. Analysis and treatment. Composites Part A: Applied Science and Manufacturing 2013;53:109–17. https://doi.org/10.1016/j.compositesa.2013.06.001
[15] Wank JP, Schäfer B, Mitsch J, Kärger L. Strain gradient calculation as a basis for localized roving slip prediction in macroscopic forming simulation of non-crimp fabrics. Materials Research Proceedings 2024;41:467–76. https://doi.org/10.21741/9781644903131-52
[16] Schäfer B, Zheng R, Colmars J, Platzer A, Naouar N, Boisse P, et al. Experimental analysis of the forming behavior of uni- and bidirectional non-crimp fabrics for different geometries. Composites Part B: Engineering 2024;287:111765. https://doi.org/10.1016/j.compositesb.2024.111765
[17] Dörr D, Schirmaier FJ, Henning F, Kärger L. A viscoelastic approach for modeling bending behavior in finite element forming simulation of continuously fiber reinforced composites. Composites Part A: Applied Science and Manufacturing 2017;94:113–23. https://doi.org/10.1016/j.compositesa.2016.11.027
[18] Poppe C, Rosenkranz T, Dörr D, Kärger L. Comparative experimental and numerical analysis of bending behaviour of dry and low viscous infiltrated woven fabrics. Composites Part A: Applied Science and Manufacturing 2019;124:105466. https://doi.org/10.1016/j.compositesa.2019.05.034
[19] Schäfer B, Naouar N, Kärger L. Investigation of the friction behavior of uni- and bidirectional non-crimp fabrics. Materials Research Proceedings 2024;41:540–8. https://doi.org/10.21741/9781644903131-60
[20] Bai R, Chen B, Colmars J, Boisse P. Physics-based evaluation of the drapability of textile composite reinforcements. Composites Part B: Engineering 2022;242:110089. https://doi.org/10.1016/j.compositesb.2022.110089
