中国塑料 ›› 2024, Vol. 38 ›› Issue (4): 73-78.DOI: 10.19491/j.issn.1001-9278.2024.04.012

• 加工与应用 • 上一篇    下一篇

连续碳纤增强B柱加强板结构设计与铺覆仿真

姜曙1,2, 王阳2, 翟孟雷2, 李庆涛2(), 黄明2(), 刘春太2   

  1. 1.河南工程学院土木工程学院,郑州 451191
    2.郑州大学橡塑模具国家工程研究中心,郑州 450002
  • 收稿日期:2023-10-07 出版日期:2024-04-26 发布日期:2024-04-22
  • 通讯作者: 李庆涛(1985—),男,实验员,博士,研究方向为聚合物成型工艺和模具优化, liqingtao@zzu.edu.cn
    黄明(1978—),男,教授,博士,研究方向为聚合物加工数值模拟,huangming@zzu.edu.cn
    E-mail:liqingtao@zzu.edu.cn;huangming@zzu.edu.cn
  • 基金资助:
    国家重点研发计划“变革性技术关键科学问题”重点专项(2019YFA0706802);深圳市科技计划(CJGJZD20210408092602006)

Structural design and overlay simulation of continuous carbon⁃fiber⁃reinforced B⁃pillar reinforced plate

JIANG Shu1,2, WANG Yang2, ZHAI Menglei2, LI Qingtao2(), HUANG Ming2(), LIU Chuntai2   

  1. 1.College of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China
    2.National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China
  • Received:2023-10-07 Online:2024-04-26 Published:2024-04-22
  • Contact: LI Qingtao, HUANG Ming E-mail:liqingtao@zzu.edu.cn;huangming@zzu.edu.cn

摘要:

针对连续纤维复合材料成型过程中在大曲率位置易导致纤维断裂、褶皱、撕裂等缺陷问题,本文基于连续纤维复合材料随模铺覆仿真方法,理论分析了铺覆起点、初始取向对铺覆效果的影响规律。以减少纤维成型缺陷为目标,开展了连续碳纤维增强复合材料B柱加强板的结构优化和铺覆优化设计,确定了面向热压成型工艺的B柱加强板几何结构和预浸料铺覆方式。通过分块铺覆优化,使0 °、90 °、45 °、-45 °的铺层不合格占比分别由45.18 %、52.83 %、72.21 %、71.78 %降至2.47 %、3.45 %、5.31 %、4.77 %,有效提高了连续碳纤维的随模铺覆性。基于优化的铺覆设计,成功试制出满足性能要求的B柱加强板。

关键词: B柱加强板, 连续纤维, 结构优化, 铺覆仿真, 复合材料

Abstract:

At present, the composites with short or long fibers as reinforcement have been widely used in automotive non⁃load⁃bearing parts. If the composites need to be further developed for the application in automotive main or secondary load⁃bearing parts, it is necessary to use continuous carbon fiber to improve their product strength and stiffness. However, in the forming process of continuous fiber⁃reinforced composites, the small elongation at break of carbon fiber makes it easy to cause molding defects such as fiber fracture, wrinkling, and tearing in the position of the large curvature. To solve this problem, the influence of the starting point and initial orientation of fiber laying on the overlay effect was analyzed theoretically through the simulation method of continuous fiber⁃reinforced composite laying with mold. To reduce fiber forming defects, the structural and overlay optimization design of continuous carbon⁃fiber reinforced B⁃pillar reinforced plate were carried out, and the geometry of B⁃pillar reinforced plate and the method of laying prepreg for the hot⁃pressing process were determined. Through the optimization of segmented overlay, the proportion of the unqualified layer at 0 °, 90 °, 45 °, and -45 ° was reduced from 45.18 %, 52.83 %, 72.21 %, and 71.78 % to 2.47 %, 3.45 %, 5.31 %, and 4.77 %, respectively. This indicated that the segmented overlay could effectively improve the lamination performance of the continuous carbon fiber. Based on the optimized overlay design, the B⁃pillar reinforced plate that meets the performance requirements has been successfully trial produced.

Key words: B?pillar reinforced plate, continuous fiber, structure optimization, overlaying simulation, composite

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