Tufting复合材料预制体成形及数值仿真研究进展

Advances in forming and numerical simulation research of tufted composite preforms

  • 摘要: 三维复合材料因其优异的抗分层能力,在航空航天等领域具有巨大的应用价值,近年来受到了国内外研究者的广泛关注。然而,传统三维复合材料制造周期长,工艺复杂度高,曲面成形难度大,已成为制约三维复合材料构件应用推广的关键难题之一。Tufting缝合(亦称“簇绒缝合”)是一种工艺简单的单边缝合技术,其缝合线非互锁的结构特征使Tufting缝合后的三维预制体在曲面上无缺陷成形变为可能。本文首先对Tufting缝合工艺的发展历程和Tufting缝合复合材料的结构特征进行了概述,其次梳理了现有关于Tufting缝合预制体曲面模压成形方面的研究,重点从成形性能分析、成形缺陷定义和数字化表征手段3个方面,指出了目前研究所取得的进步和尚缺少的不足,并对Tufting缝合预制体曲面模压成形的数值模拟方法进行了总结,点明了Tufting缝合预制体成形模型的特殊性,最后展望了Tufting缝合技术在复合材料预制体成形领域未来的发展方向。

     

    Abstract: Three-dimensional composite materials have great application value in aerospace and other fields due to their excellent anti-delamination capability. In recent years, they have attracted extensive attention from domestical and abroad researchers. However, for the traditional three-dimensional (3D) composite materials, they require long manufacturing cycles, complex manufacturing technique and are hard to be formed. This has become one of the key challenges restricting the broad application of the 3D composite components. Tufting is a simple single-sided stitching technique characterized by non-interlocked structure. This feature probably allows three-dimensional preforms made by tufting to be shaped on curved surfaces without defects. Firstly, this paper outlines the development of tufting technology and the structural characteristics of tufted composite materials. Secondly, it reviews existing research on forming tufted preform with curved mold, focusing on three aspects: Formability analysis, definition of forming defects, and digital characterization methods. It points out the progress made in current research and the shortcomings that still exist. Furthermore, it summarizes the numerical simulation methods for the forming process of tufted preform, highlighting the specific forming model of the tufted preform. Finally, it explores the future direction of tufting technology in the field of forming for composite materials.

     

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