固化工艺参数对国产T800增强高韧性复合材料性能的影响

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (6): 98-104.

固化工艺参数对国产T800增强高韧性复合材料性能的影响

李伟¹, 张晨乾^2*, 叶宏军², 包建文²

1.昌河飞机工业(集团)有限责任公司工程技术部,景德镇333000;
2.中国航空业集团公司基础技术研究院复合材料技术中心,北京101300

收稿日期:2019-09-05 出版日期:2020-06-28 发布日期:2020-06-28
通讯作者: 张晨乾(1983-),男,博士,高级工程师,主要从事复合材料成型工艺方面的研究,13552781573@163.com。
作者简介:李伟(1989-),男,学士,工程师,主要从事复合材料成型方面的研究。

EFFECT OF CURING PROCESS PARAMETERS ON THE PROPERTIES OF HIGH TOUGHNESS COMPOSITES REINFORCED BY DOMESTIC T800 CARBON FIBER

LI Wei¹, ZHANG Chen-qian^2*, YE Hong-jun², BAO Jian-wen²

1. Engineering Technology Department of Changhe Aircraft Industry (Group) Co. , Ltd. , Jingdezhen 333000, China;
2. AVIC Composite Technology Centerline, Beijing 101300, China

Received:2019-09-05 Online:2020-06-28 Published:2020-06-28

摘要/Abstract

摘要： 针对AC531/CCF800H高韧性复合材料在0.2 MPa+真空(-0.07 MPa)条件下出现的固化缺陷问题,采用流变仪表征法分析了AC531树脂在不同温度条件下的黏度变化及其流动特性。AC531/CCF800H预成型体固化过程中,AC531树脂在纤维层间的流动可以用 Darcy定理来描述。利用Darcy定理可知AC531/CCF800H复合材料内部的孔隙率随着固化压力的增加而减小,浸渍实验结果表明两者近似呈线性关系。织物和单向带替代铺层的A扫检测结果表明AC531/CCF800H复合材料在固化过程中,以面内流动为主。根据不同固化压力条件下AC531/CCF800H复合材料的内部质量及力学性能测试结果可知,有效固化压力是影响AC531/CCF800H复合材料内部质量的关键影响因素。其有效固化压力应至少为0.3 MPa,继续提高压力对其常温力学性能影响不大,但可以降低制件内部的孔隙率,减小制件的单层厚度。

关键词: 高韧性复合材料, 高强中模碳纤维, 固化工艺, 力学性能

Abstract: The viscosity and flow characteristics of AC531/CCF800H high toughness composites under 0.2 MPa+vacuum (-0.07 MPa) conditions were analyzed by the rheological instrument method. During the curing process of AC531/CCF800H preform, the flow of AC531 resin between fibre layers can be described by Darcy's theorem. According to the Darcy theorem, the porosity in the AC531/CCF800H composite decreases with the increase of the curing pressure. The results of the impregnation experiment show that there is a linear relationship between the porosity and the porosity. The results of A scanning for fabric and unidirectional tape replacement showed that AC531/CCF800H composites were mainly in-plane flow during curing. According to the test results of the internal and mechanical properties of AC531/CCF800H composites under different curing pressure, it is found that the effective curing pressure is the key factor affecting the internal quality of AC531/CCF800H composites. The effective curing pressure should be at least 0.3 MPa, and the continuous increase of pressure has weak effect on the mechanical properties at normal temperature, but it can reduce the internal porosity and reduce the single layer compression thickness of the parts.

Key words: high toughness composites, high-strength medium modulus carbon fiber, curing process, mechanical properties

中图分类号:

TB332

李伟, 张晨乾, 叶宏军, 包建文. 固化工艺参数对国产T800增强高韧性复合材料性能的影响[J]. 复合材料科学与工程, 2020, 0(6): 98-104.

LI Wei, ZHANG Chen-qian, YE Hong-jun, BAO Jian-wen. EFFECT OF CURING PROCESS PARAMETERS ON THE PROPERTIES OF HIGH TOUGHNESS COMPOSITES REINFORCED BY DOMESTIC T800 CARBON FIBER[J]. Composites Science and Engineering, 2020, 0(6): 98-104.

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