未固化预浸料在热模压预成型过程中的黏弹性行为研究

doi:10.19936/j.cnki.2096-8000.20221228.031

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (2): 84-93.DOI: 10.19936/j.cnki.2096-8000.20221228.031

未固化预浸料在热模压预成型过程中的黏弹性行为研究

李哲夫^1,3, 刘卫平^2,3, 孙宝忠^1,3, 岳广全^1,3*, 谈源⁴, 张俭⁴

1.东华大学纺织学院,上海 201620;
2.上海飞机制造有限公司,上海 201620;
3.东华大学民用航空复合材料协同创新中心,上海 201620;
4.常州市新创智能科技有限公司,常州 213135

收稿日期:2022-03-09 出版日期:2023-02-28 发布日期:2023-04-28
通讯作者: 岳广全(1982—),男,博士后,高级工程师,硕士生导师,主要从事纤维增强树脂基复合材料成型工艺过程方面的研究,yueguangquan@dhu.edu.cn。
作者简介:李哲夫(1992—),男,博士研究生,主要从事纤维增强树脂基复合材料成型工艺过程方面的研究。
基金资助:
宁夏回族自治区重点研发计划项目(2021BEE02017);上海市科技创新行动计划项目(20511106902);中央高校基本科研业务费专项资金资助

Investigation of the viscoelastic behavior in the hot press-forming process of uncured prepreg laminates

LI Zhefu^1,3, LIU Weiping^2,3, SUN Baozhong^1,3, YUE Guangquan^1,3*, TAN Yuan⁴, ZHANG Jian⁴

1. College of Textiles, Donghua University, Shanghai 201620, China;
2. Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201620, China;
3. Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China;
4. Changzhou Newtry Aviation Technology Co., Ltd., Changzhou 213135, China

Received:2022-03-09 Online:2023-02-28 Published:2023-04-28

摘要/Abstract

摘要： 在热模压预成型过程中,压力对最终产品的性能和质量有重要影响。本文研究了未固化预浸料层合板在不同铺层方向、压缩距离、压缩速度及厚度下的压缩和松弛行为。结果表明,幂律模型能准确描述热模压过程中预浸料受外力压缩时的应力变化,广义Maxwell模型和考虑应变历史的分数阶黏弹性模型能描述预浸料的应力松弛过程,拟合曲线与实验点吻合良好,R²均大于0.96。相较于广义Maxwell模型,分数阶黏弹性模型所需确定的参数少,物理意义明确,更适合描述预浸料在热模压过程中应力松弛时的黏弹性变形过程。

关键词: 黏弹性行为, 应力松弛, 分数阶黏弹性模型, 未固化预浸料层压板, 热模压预成型, 复合材料

Abstract: In the pre-forming process of uncured prepreg laminates with hot press, pressure is an important parameter that affects the performance and quality of the final product. In this study, the compression and relaxation viscoelastic behaviors of uncured prepreg laminates were investigated in different fiber orientation, displacements, velocities, and thicknesses. The results show that the power law model could accurately describe the compression behaviors of prepreg. The generalized Maxwell viscoelastic model and the fractional viscoelastic model could describe the relaxation behaviors of prepreg, respectively. The theoretical fitting curves match very well with experimental data at each condition and the R-squared value is greater than 0.96. Compared with the generalized Maxwell model, the fractional viscoelastic model requires fewer parameters and has more definite physical significance, which is more suitable for describing the viscoelastic deformation behaviors of prepreg in the process of hot press-forming.

Key words: viscoelastic behavior, stress relaxation, the fractional viscoelastic model, uncured prepreg laminates, hot press-forming, composites

中图分类号:

TB332

李哲夫, 刘卫平, 孙宝忠, 岳广全, 谈源, 张俭. 未固化预浸料在热模压预成型过程中的黏弹性行为研究[J]. 复合材料科学与工程, 2023, 0(2): 84-93.

LI Zhefu, LIU Weiping, SUN Baozhong, YUE Guangquan, TAN Yuan, ZHANG Jian. Investigation of the viscoelastic behavior in the hot press-forming process of uncured prepreg laminates[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(2): 84-93.

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未固化预浸料在热模压预成型过程中的黏弹性行为研究

Investigation of the viscoelastic behavior in the hot press-forming process of uncured prepreg laminates

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