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HomeMaterials Science ForumMaterials Science Forum Vol. 1182Fabric Patching: A Simple Approach to Mitigate...

Fabric Patching: A Simple Approach to Mitigate Defects

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Abstract:

Forming of dry textile preforms for liquid moulding processes becomes increasingly challenging for geometries exhibiting strong double curvature and aggressive tapering. While sequential draping can mitigate defects, it is often impractical for high-rate manufacturing and lacks robustness for dry fabrics with limited inter-ply tack. This paper investigates an alternative approach in which locally printed and cured or semi-cured resin patches are used to steer deformation during forming and suppress shear localisation. A numerical framework is developed to model patched preforms using a superposition-based material representation and is applied to an extreme “bow-tie” benchmark geometry. Initial simulations reveal severe shear-strain localisation leading to fibre-path instability. Various patching strategies are explored to identify the dominant drivers governing defect mitigation. The results demonstrate that appropriately placed and sufficiently stiff patches can significantly delocalise shear and eliminate multi-stripe deformation patterns. Based on these findings, key optimisation parameters and practical guidelines for patch placement and stiffness selection are formulated, providing a foundation for future automated optimisation of patch-assisted preform forming.

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Periodical:

Materials Science Forum (Volume 1182)

Pages:

51-58

DOI:

https://doi.org/10.4028/p-jWtIA2

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Cite this paper

Online since:

April 2026

Authors:

Siyuan Chen, Jonathan P.H. Belnoue, Dmitry S. Ivanov*

Keywords:

Defect Mitigation, Embedded Element Approach, Forming of Dry Preforms

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Creative Commons CC BY 4.0

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* - Corresponding Author

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