航空用国产碳纤维/双马树脂复合材料湿热力学性能

李博; 文友谊; 王千足; 顾轶卓; 李敏; 张佐光

doi:10.11868/j.issn.1005-5053.2019.000138

航空用国产碳纤维/双马树脂复合材料湿热力学性能

doi: 10.11868/j.issn.1005-5053.2019.000138

1.
成都飞机工业（集团）有限责任公司，成都 610092
2.
北京航空航天大学材料科学与工程学院，北京 100191

基金项目: 国家自然科学联合基金项目（U1664250）

详细信息

通讯作者:
顾轶卓（1979—），男，博士，副教授，从事树脂基复合材料的研究，联系地址：北京航空航天大学材料学院104教研室（100191），E-mail：benniegu@buaa.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2019-08-26
- 修回日期: 2019-09-21
- 刊出日期: 2020-10-01

Hygrothermal mechanical properties of domestic carbon fiber/bismaleimide resin composites for aviation application

1.
Chengdu Aircraft Industrial（group）Co.，Ltd.，Chengdu 610092，China
2.
School of Materials Science and Engineering，Beihang University，Beijing 100191，China

摘要

摘要: 用一种航空用国产T700级碳纤维和4种双马树脂分别制备复合材料，采用三种湿热条件（100 ℃水煮、70 ℃水浸、70 ℃/85%相对湿度）对复合材料层板进行湿热处理，研究室温和150 ℃下与界面和基体相关的复合材料湿热力学性能。结果表明：湿热处理后复合材料的力学性能有所降低，尤其是对复合材料高温力学性能影响显著，其中90°拉伸性能、0°压缩强度、弯曲强度、开孔压缩强度对吸湿和温度较敏感，而0°压缩模量、弯曲模量和开孔拉伸强度对吸湿和温度不敏感。对比不同湿热条件处理后复合材料力学性能的变化，发现100 ℃水煮后力学性能衰减幅度较大，认为这与其平衡吸湿率较高有关。结合90°拉伸断面的扫描电镜分析，认为界面湿热性能是决定国产碳纤维复合材料湿热性能的关键因素。
- 碳纤维复合材料 /
- 双马树脂 /
- 湿热处理 /
- 力学性能 /
- 界面
Abstract: The composites were separately prepared by a domestic T700-grade carbon fiber used for aviation and four types of bismaleimide resin. The composite laminates were treated by three hygrothermal conditions, including 100 ℃ boiling water, 70 ℃ water immersion and 70 ℃/85% relative humidity to study the hygrothermal mechanical properties of the composite laminates related to interface and matrix under ambient temperature and 150 ℃. The results show that the moisture absorption decreases the mechanical properties of composites, and the effect on mechanical properties under high temperature is significant. Furthermore, 90^o tensile property, 0^o compressive strength, flexural strength and open-hole compressive strength are sensitive to moisture absorption and temperature, while the sensitivities of 0^o compressive modulus, flexural modulus and open-hole tensile strength are small. By comparing the changes of the mechanical properties of composite after different hygrothermal treatment conditions, it is found that the degree of degradation after 100 ℃ boiling water is larger, which is believed to be related to its higher equilibrium moisture absorption rate. Based on fracture morphology of composite after 90^otensile testing using scanning electron microscope, it is considered that the hygrothermal property of interface is the critical factor to determine the hygrothermal property of domestic carbon fiber composite.
- carbon fiber composite /
- bismaleimide resin /
- hydrothermal treatment /
- mechanical property /
- interface

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图 1 不同湿热条件下4种碳纤维/双马树脂复合材料单向板吸湿曲线　（a）100 ℃水煮；（b）70 ℃水浸；（c）70 ℃/ 85%RH

Figure 1. Moisture absorption curves of four kinds of carbon fiber/bismaleimide matrix unidirectional laminates under different hygrothermal conditions　（a）100 ℃ boiling water；（b）70 ℃ water immersion；（c）70 ℃/85%RH

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图 2 70 ℃水浸前后复合材料0°压缩强度（a）及压缩模量（b）

Figure 2. 0° compressive strength （a）and modulus （b）of composite before and after 70 ℃ water immersion

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图 3 70 ℃水浸前后复合材料弯曲强度（a）及弯曲模量（b）

Figure 3. Flexural strength （a） and modulus （b） of composite before and after 70 ℃ water immersion

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图 4 70 ℃水浸前后复合材料90°拉伸强度（a）及拉伸模量（b）

Figure 4. 90° tensile strength （a）and modulus（b） of composite before and after 70 ℃ water immersion

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图 5 70 ℃水浸处理前后复合材料开孔拉伸强度（a）及开孔压缩强度（b）

Figure 5. Open-hole tensile strength （a）and compressive strength（b） of composite before and after 70 ℃ water immersion

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图 6 70 ℃水浸处理前后复合材料层间剪切强度

Figure 6. Interlaminar shear strength of composite before and after 70 ℃ water immersion

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图 7 QY8911-4层板吸湿前后90°拉伸强度和模量

Figure 7. 90° tensile strength and modulus of QY8911-4 laminate before and after moisture absorption

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图 8 QY8911-4层板吸湿前后0°压缩强度和模量

Figure 8. 0° compressive strength and modulus of QY8911-4 laminate before and after moisture absorption

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图 9 QY8911-4层板吸湿前后弯曲强度和模量

Figure 9. Flexural strength and modulus of QY8911-4 laminate before and after moisture absorption

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图 10 QY8911-4层板吸湿前后层间剪切强度

Figure 10. Interlaminar shear strength of QY8911-4 laminate before and after moisture absorption

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图 11 QY8911-4层板吸湿前后开孔拉伸强度和开孔压缩强度

Figure 11. Open-hole tensile and compressive strength of QY8911-4 laminate before and after moisture absorption

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图 12 QY8911-4单向层板在不同湿热条件下的湿膨胀系数

Figure 12. Moisture expansion coefficient of QY8911-4 unidirectional laminate under different hydrothermal conditions

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图 13 QY8911-4层板90°拉伸断面扫描电镜照片　（a）干态室温；（b）干态高温；（c）70 ℃水浸室温；（d）70 ℃水浸高温；（e）100 ℃水煮室温；（f）100 ℃水煮高温；（g）70 ℃/ 85%RH室温；（h）70 ℃/ 85%RH高温

Figure 13. Fracture morphology of QY8911-4 laminate after 90° tensile testing using scanning electron microscope（a）dry at room temperature；（b）dry at elevated temperature；（c）70 ℃ water immersion at room temperature；（d）70 ℃ water immersion at elevated temperature；（e）100 ℃ boiling water at room temperature；（f）100 ℃ boiling water at elevated temperature；（g）70 ℃/85% RH at room temperature；（h）70 ℃/85% RH at elevated temperature

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表 1 碳纤维/双马复合材料层板

Table 1. Carbon fiber/bismaleimide resin composite laminates

Material brand	Material type	Molding method
JH carbon fiber/QY9611 resin	Unidirectional prepreg	Autoclave
JH carbon fiber/5429 resin	Unidirectional prepreg	Autoclave
JH carbon fiber/QY9512 resin	Unidirectional fabric and resin film	Resin film infusion
JH carbon fiber/QY8911-4 resin	Unidirectional fabric and liquid resin	Resin transfer molding

下载: 导出CSV

表 2 三种湿热实验条件

Table 2. Three kinds of hydrothermal conditions

Treating condition	Treating time/h
100 ℃ boiling water	130
70 ℃ water immersion	390
70 ℃/85% relative humidity	850

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