Microstructure characterization of 3D woven cylinder preform with weft skew considered

doi:10.19936/j.cnki.2096-8000.20260128.011

Abstract

Abstract: Micro-computed tomography (Micro-CT) was employed to elucidate the actual meso-scale architecture of 3D woven angle interlock cylinder preforms. A detailed analysis was conducted to ascertain the cross-sectional geometry and the spatial arrangement of yarns within each system. It was observed that the weft skew phenomenon occurred during the fabrication process of the cylinder preform. Under the premise that the cross-sectional profiles of warp and weft yarns are rectangular and lens-shaped, respectively, a geometric model for a 3D woven cylinder fabric exhibiting weft skew has been formulated. This model delineates the interdependencies among yarn parameters, fabric characteristics, and the structural dimensions of the cylinder preform. The model's accuracy has been quantified, with an error margin of -1.958%. The cylindrical specimen was meticulously prepared for subsequent analysis. Analysis of the findings revealed that the weft yarn skew typically ranges from 30° to 50°, a variance that is significantly influenced by the weft density. Notably, the skew increases with a higher weft density. These insights provide crucial technical guidance for the process design of 3D woven cylinder prefabrication.

Key words: three-dimensional weaving, Micro-CT, microtructure, weft skew, geometric model, composites

CLC Number:

TB332

HU Jing'ai, JIAO Yanan, ZHANG Yifan, DUAN Jingjing. Microstructure characterization of 3D woven cylinder preform with weft skew considered[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(1): 74-81.

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