Unit Yarn-Addition Technique and Microstructures of Tapered 3D Braided Preform

Abstract:

The unit yarn-addition technique which can realize net-shape preparation of tapered 3D braided preforms was introduced. Special preform microstructures near the yarn-addition cross-section were studied by observation and modeling, respectively. Results show that a surface or an interior yarn-addition unit is the smallest yarn assembly to be added and the braiding rules should be maintained after unit yarn-addition. Two special yarn groups are formed due to the addition of a surface unit, with longer yarn lengths and larger braiding angles. When an interior unit is added, the yarn length and braiding angle of one yarn group both increase. However, the other yarn group reverses the orientation direction only.

• Periodical: Advanced Materials Research (Volume 627)
• Pages: 361-364
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.627.361
• Online since: December 2012
• Authors: Zhao Lin Liu
• Keywords: Microstructure Modeling, Microstructure Observation, Tapered 3D Braided Preform, Unit Yarn-Addition Technique

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