复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (4): 35-40.DOI: 10.19936/j.cnki.2096-8000.20210428.005

• 基础研究 • 上一篇    下一篇

三维织造复合材料预制体纤维体积含量的预测及实验验证

李春晖1, 贺磊1,2*, 王正方1, 程祥1   

  1. 1.山东理工大学 机械工程学院,淄博255000;
    2.机械科学研究总院集团有限公司 先进成形技术与装备国家重点实验室,北京100083
  • 收稿日期:2020-08-17 出版日期:2021-04-28 发布日期:2021-04-30
  • 通讯作者: 贺磊(1980-),男,博士,副教授,主要从事机构学与创新设计等方面的研究,helei@sdut.edu.cn。
  • 作者简介:李春晖(1996-),女,硕士研究生,主要从事现代设计理论与方法方面的研究。
  • 基金资助:
    2019年度山东省新旧动能转换重大工程重大课题攻关项目(XJZHGG2019002);国家自然科学基金资助项目(51790173)

PREDICTION AND EXPERIMENTAL VERIFICATION OF THREE-DIMENSIONAL WOVEN COMPOSITE PREFORM FIBER VOLUME FRACTION

LI Chun-hui1, HE Lei1,2*, WANG Zheng-fang1, CHENG Xiang1   

  1. 1. School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China;
    2. State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology Group Co., Ltd., Beijing 100083, China
  • Received:2020-08-17 Online:2021-04-28 Published:2021-04-30

摘要: 为确定三维织造复合材料预制体的纤维体积含量,建立四边形和三角形预制体的细观结构模型,将预制体划分为内胞、边胞、角胞等单胞形式,确定单胞类型系数并根据单胞排布方式将预制体用矩阵表示,将计算的纤维体积含量理论值与称重法得到的实测值进行比较。结果表明:预制体纤维体积含量的理论计算模型较为准确,误差控制在4%以内;纤维体积含量随Z向纤维股数的增大而增大,随规格的增大而减小,当规格增大到一定值时,纤维体积含量趋近相同;纤维体积含量实测值随织造层数和水平面内纤维股数的增大而减小。

关键词: 复合材料预制体, 纤维体积含量, 单胞, 称重法

Abstract: Fiber volume fraction is an important indicator for the design and analysis of three-dimensional woven composites, and has a great influence on the impregnation process and material properties of composites. In order to determine the fiber volume fraction of the three-dimensional woven composite preform, the meso-structure model of the quadrilateral and triangular preforms was established. The preform is divided into unit cell forms such as interior cell, side cell, corner cell, etc. The unit cell type coefficient is determined and the preform is represented by a matrix according to the unit cell arrangement. The fiber volume fraction of the preform is calculated by the unit cell type coefficient matrix and the unit cell volume. The fiber volume fraction theoretical value is compared with the actual measured value obtained by the weighing method. The results show that the theoretical calculation model of preform fiber volume fraction is accurate, and the error is controlled within 4%. The fiber volume fraction increases with the increase in the number of fiber strands in the Z direction, and decreases with the increase of the size. When the size increases to a certain value, the fiber volume fraction approaches the same. The measured value of fiber volume fraction decreases with the increase of the number of weaving layers and the number of fiber strands in the horizontal plane. Finally, the possible reasons for the above conclusions are analyzed. This calculation method can provide a theoretical reference for the prediction of fiber volume fraction of arbitrary shape preforms.

Key words: composite preform, fiber volume fraction, unit cell, weighing method

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