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Numerical modelling of 3D woven preform deformations

机译：3D编织预成型坯变形的数值模型

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摘要

In order to accurately predict the performance of 3D woven composites, it is necessary that realistic textile geometry is considered, since failure typically initiates at regions of high deformation or resin pockets. This paper presents the development of a finite element model based on the multi-chain digital element technique, as applied to simulate weaving and compaction of an orthogonal 3D woven composite. The model was reduced to the scale of the unit cell facilitating high fidelity results combined with relatively fast analysis times. The results of these simulations are compared with micro computed tomography (CT) scans of a dry specimen of fabric subjected to in situ compaction. The model accurately depicted all of the key features of the fabric including yarn waviness and cross-sectional shapes as well as their development with compaction. A parametric study is presented to characterise the effect of the model inputs on the analysis speed and accuracy.
机译：为了准确预测3D编织复合材料的性能，必须考虑实际的纺织品几何形状，因为故障通常会在高变形或树脂袋的区域开始。本文介绍了基于多链数字元素技术的有限元模型的开发，该模型用于模拟正交3D编织复合材料的编织和压实。该模型缩小到了晶胞的大小，从而有助于获得高保真度的结果以及相对较快的分析时间。将这些模拟结果与经过现场压实的干燥织物样品的微计算机断层扫描（CT）扫描进行比较。该模型准确地描述了织物的所有关键特征，包括纱线的波纹度和横截面形状，以及它们随着压实而发展。进行了参数研究，以表征模型输入对分析速度和准确性的影响。

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  • 来源
    《Composite Structures》 |2014年第2期|747-756|共10页
  • 作者

    S.D. Green; A.C. Long; B.S.F. El Said; S.R. Hallett;

  • 作者单位

    Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, University Walk, Bristol BS8 1TR, UK;

    Polymer Composites Research Group, University of Nottingham, University Park, Nottingham NC7 2RD, UK;

    Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, University Walk, Bristol BS8 1TR, UK;

    Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, University Walk, Bristol BS8 1TR, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    3D weave; Textile composites; Finite element analysis (FEA); Preform;

    机译：3D编织;纺织复合材料;有限元分析（FEA）;瓶坯;

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