• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (9): 191-197.doi: 10.3901/JME.2019.09.191

• 制造工艺与装备 • 上一篇    下一篇

复合材料构件预制体压实致密工艺研究

胡培利, 单忠德, 刘云志, 刘丰, 侯卓健   

  1. 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:2018-03-19 修回日期:2018-07-11 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: 单忠德(通信作者),男,1970年出生,研究员,博士研究生导师。主要研究方向为数字化成形制造技术与装备及复合材料成形技术。E-mail:shanzd@cam.com.cn
  • 作者简介:胡培利,女,1991年出生。主要研究方向为复合材料成形技术。E-mail:xinyuanpeili163@163.com
  • 基金资助:
    国家自然科学基金资助项目(51790173)。

Compaction and Densification Process of Composite Component Preforms

HU Peili, SHAN Zhongde, LIU Yunzhi, LIU Feng, HOU Zhuojian   

  1. State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology Group Co. Ltd, Beijing 100083
  • Received:2018-03-19 Revised:2018-07-11 Online:2019-05-05 Published:2019-05-05

摘要: 为实现柔性导向三维织造复合材料构件预制体织造过程中结构的致密化,采用数字化压实致密系统对三维织造复合材料构件进行压实特性研究,测量并记录压实过程中压实位移、压实载荷及构件回弹量与成形工艺参数之间的作用规律,揭示了纤维体积分数与压缩应力的关系。研究表明数字化柔性导向三维织造复合材料构件致密化压实过程可分为低应力线性预压实、非线性过渡压实和高应力紧密压实三个阶段,并建立复合材料构件预制体结构致密化特性的理论公式。在压实致密过程中对构件进行保压处理,分析压实载荷与保压时间的关系,表明柔性导向三维织造构件的可压缩性随着织造层数的增多而逐渐降低,回弹量与织造层数正相关,平均每层纤维回弹量逐渐降低并趋于稳定。

关键词: Z向压实, 复合材料构件, 数字化三维织造, 预制体回弹

Abstract: In order to achieve the densification of the structure of the flexible guided three-dimensional weaving composite prefabricated component during the weaving process, a digital compaction system is used to study the compaction characteristics of the three-dimensional woven composite component, and the compaction displacement and compaction during the compaction process are measured and recorded. The relationship between the load and the spring-back of the component and the forming process parameters reveals the relationship between fiber volume fraction and compressive stress. It shows that the densification and compaction process of digital flexible oriented three-dimensional weaving composites can be divided into three stages:low-stress linear pre-compaction, non-linear transitional compaction and high-stress compaction, and the densification of the composite preform structure are established. The theoretical formula of the characteristic, in the process of compaction and densification, the components are subjected to pressure maintaining treatment, and the relationship between compaction load and holding time is analyzed. It shows that the compressibility of the flexible guided three-dimensional weaving components gradually decreases with the increase of the number of layers, the rebound amount and weaving. The number of layers is positively correlated, and the average fiber rebound per layer gradually decreases and tends to be stable.

Key words: composites parts, digital three-dimensional weaving, spring-back of preforms, Z-direction compaction

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