纤维波纹对层间增韧碳纤维/环氧复合材料单向板力学性能的影响

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (3): 49-54.

纤维波纹对层间增韧碳纤维/环氧复合材料单向板力学性能的影响

徐鹏¹, 顾轶卓^2*, 吴臣君², 高龙飞¹

1.上海飞机制造有限公司,上海200436;
2.北京航空航天大学,北京100191

收稿日期:2018-06-12 出版日期:2019-03-28 发布日期:2019-03-28
通讯作者: 顾轶卓(1979-),男,博士,副教授,主要从事树脂基复合材料工艺以及测试方法方面的研究,benniegu@buaa.edu.cn。
作者简介:徐鹏(1987-),男,博士,工程师,主要从事复合材料工艺研发和仿真技术方面的研究。
基金资助:
国家商用飞机制造工程技术研究中心创新基金项目(COMAC-SFGS-2016-33197)

INFLUENCES OF FIBER WAVINESS ON MECHANICAL PROPERTIES OF INTERLAMINAR TOUGHENING CARBON FIBER/EPOXY COMPOSITE UNIDIRECTIONAL LAMINATE

XU Peng¹, GU Yi-zhuo^2*, WU Chen-jun², GAO Long-fei¹

1.Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436,China;
2.Beihang University, Beijing 100191, China

Received:2018-06-12 Online:2019-03-28 Published:2019-03-28

摘要/Abstract

摘要： 本文采用层间增韧型碳纤维/环氧预浸料X850,通过碾压预制的面外波纹和预浸料叠层中插入预浸料条两种方法,分别制作了含面内纤维屈曲和面外纤维褶皱缺陷的单向层板,成型固化采用热压罐工艺。对复合材料中的两种纤维波纹进行了表征,并对拉伸与压缩性能进行了测试分析。实验结果表明:得到了波纹比不同的复合材料试样,纤维含量一致且无其他缺陷;在所预制的波纹比范围内,面外褶皱对层板的拉伸性能影响较小,压缩性能小幅降低,而拉伸及压缩性能对面内屈曲非常敏感,随波纹比增大,强度、模量及试样的破坏模式均发生显著变化,说明纤维波纹形式对该类缺陷的评估十分重要。

关键词: 碳纤维复合材料, 层间增韧, 纤维波纹, 面内纤维屈曲, 面外纤维褶皱, 力学性能

Abstract: In this study, interlaminar toughening carbon fiber /epoxy prepreg, i.e. X850, was adopted. Based on autoclave curing process, two kinds of unidirectional carbon fiber laminates with in-plane and out-of-plane waviness were fabricated by rolling prefabricated out-of-plane waviness and inserting prepreg strip into prepreg stack, respectively. The two kinds of fiber waviness defects in composites were characterized. In addition, tensile and compressive properties were measured and analyzed. The experimental results show that composite specimens containing different fiber waviness ratio (WR) were obtained with almost the same fiber content without other defects. For the range of prefabricated WR, the effect of out-of-plane wrinkling on tensile property can be neglected and compressive property decrease slightly. However, tensile and compressive properties are very sensitive to in-plane buckling. Their modulus, strength and failure mode change significantly, as WR increases. It is indicated that the type of fiber waviness is very important for evaluating this kind of defect.

Key words: carbon fiber composite, interlaminar toughening, fiber waviness, in-plane buckling, out-of-plane wrinkling, mechanical property

中图分类号:

TB332

徐鹏, 顾轶卓, 吴臣君, 高龙飞. 纤维波纹对层间增韧碳纤维/环氧复合材料单向板力学性能的影响[J]. 玻璃钢/复合材料, 2019, 0(3): 49-54.

XU Peng, GU Yi-zhuo, WU Chen-jun, GAO Long-fei. INFLUENCES OF FIBER WAVINESS ON MECHANICAL PROPERTIES OF INTERLAMINAR TOUGHENING CARBON FIBER/EPOXY COMPOSITE UNIDIRECTIONAL LAMINATE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(3): 49-54.

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