国产T800炭纤维/环氧树脂单向复合材料动态压缩性能

潘月秀; 鲍佳伟; 王凡文; 张凌东; 王杨卫; 程兴旺; 杨云华

doi:10.19869/j.ncm.1007-8827.20200128

国产T800炭纤维/环氧树脂单向复合材料动态压缩性能

doi: 10.19869/j.ncm.1007-8827.20200128

潘月秀^1,2,
鲍佳伟³,
王凡文¹,
张凌东⁵,
王杨卫^3,4,
程兴旺^3,4,
杨云华^1,2,

1.
航天材料及工艺研究所, 北京 100076;
2.
先进功能复合材料技术重点实验室, 北京 100076;
3.
北京理工大学材料学院, 北京 100081;
4.
冲击环境材料技术重点实验室, 北京 100081;
5.
火箭军装备部驻北京地区第二军代表室, 北京 100076

详细信息

作者简介:
潘月秀,博士,高级工程师.E-mail:pyxiu@163.com

通讯作者:
杨云华,博士,研究员.E-mail:nanofiber@sina.com

中图分类号: TQ342⁺.74
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出版历程
- 收稿日期: 2020-07-10
- 修回日期: 2020-10-13
- 刊出日期: 2020-12-31

Dynamic compressive properties of unidirectional composites made of TG800 carbon fiber and epoxy resin

1.
Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;
2.
Science and Technology on Advanced Functional Composites Laboratory, Beijing 100076, China;
3.
School of Materials Science&Engineering, Beijing Institute of Technology, Beijing 100081, China;
4.
National key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China;
5.
The Second Military Representative Office of the Rocket Army Equipment Department in Beijing Area, Beijing 100076, China

摘要

摘要: 采用霍普金森压杆（SHPB）装置，对不同直径和表面状态的国产T800（TG800）炭纤维/603B环氧树脂单向复合材料的动态压缩性能进行测试，通过SEM对试样断口微观形貌进行分析，结合仿真分析探讨炭纤维本征物理性能和表面特性对复合材料动态压缩性能及失效形式的影响。结果表明，TG800/603B单向复合材料在动态压缩测试中呈现脆性断裂特征，且具有明显的应变率强化效应、界面强化效应和直径效应。强界面情况下，炭纤维直径从5 μm增加到6 μm，复合材料动态压缩强度增加约18%（128 MPa），失效形式从纤维断裂和炭纤维与基体脱黏变为树脂塑性变形和纤维与基体脱黏；炭纤维直径为5.4 μm时，弱界面炭纤维复合材料动态压缩强度较强界面材料降低约6%，失效形式由炭纤维断裂、树脂塑性变形和炭纤维与基体脱黏变为炭纤维与基体脱黏。
- 动态压缩性能 /
- 失效形式 /
- 炭纤维直径 /
- TG800炭纤维 /
- 单向复合材料
Abstract: The dynamic compressive properties of unidirectional composites made of TG800 carbon fibers and an epoxy resin were tested by the split Hopkinson pressure bar method. Effects of the fiber diameter and surface treatment by anodic oxidation on the dynamic compressive properties and fracture failure modes of the composites were investigated by SEM combined with numerical simulation. Results indicated that the TG800/epoxy resin composites had a brittle fracture behavior and strength increased as strain rate, interface strength or fiber diameter increased during dynamic compressive property testing. With strong interfacial bonding enabled by the surface treatment, when the fiber diameter was increased from 5 to 6 μm the dynamic compressive strength increased by about 18% and the primary failure mode changed from fiber breakage and debonding between fiber and resin to plastic deformation of the resin and debonding between fiber and resin. When 5.4 μm diameter fibers were used, a comparison of weak (not oxidized) versus strong interfacial bonding, showed that the dynamic compressive strength for the former was about 6% lower, and the failure mode of the latter was fiber breakage, plastic deformation of the resin, and debonding between fiber while the former was only debonding between fiber and resin.
- Dynamic compressive properties /
- Failure modes /
- Fiber diameter /
- TG800 carbon fiber /
- Unidirectional composite

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