高温水浸对T800/环氧树脂基复合材料性能的影响

doi:10.13229/j.cnki.jdxbgxb.20211021

摘要/Abstract

摘要：

分析了不同温度水浸环境下T800碳纤维/环氧树脂基复合材料的吸湿特性及性能。首先对其进行水浸吸湿试验，再分析其质量变化、吸湿率变化、红外光谱、水浸前后的表面形貌、玻璃化转变温度、压缩强度及层间剪切强度。结果表明，水浸环境温度越高，吸湿速率越快，玻璃化转变温度Tg下降程度越大；经水浸后，试样表面产生裂纹，纤维与树脂基体界面发生破坏，试样的层间剪切强度与压缩强度下降明显。

关键词: T800/环氧树脂基复合材料, 水浸环境, 吸湿率, 力学性能

Abstract:

The hygroscopic properties and properties of T800 carbon fiber/epoxy matrix composites were analyzed under water immersion conditions at different temperatures. The mass variation， moisture absorption rate variation， IR spectrum， surface morphology before and after water immersion， glass transition temperature， compressive strength and interlayer shear strength were analyzed. The results show that the temperature is higher， the rate of moisture absorption is faster， and the degree of Tg（glass transition temperature） reduction is larger. Cracks occur on the specimen surface and the interface between the fiber and the resin matrix is damaged. After water immersion， the inter-laminar shear strength and compressive strength of the sample are significantly reduced.

Key words: T800 carbon fiber-epoxy composite, immersion environment, moisture absorption rate, mechanical property

中图分类号:

TB332

许良,边钰博,周松,肖景厚. 高温水浸对T800/环氧树脂基复合材料性能的影响[J]. 吉林大学学报(工学版), 2023, 53(7): 1943-1950.

Liang XU,Yu-bo BIAN,Song ZHOU,Jing-hou XIAO. Effect of high temperature immersion on properties of T800 carbon fiber/epoxy resin composites[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(7): 1943-1950.

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试验编号	破坏载荷/N					破坏模式
试验编号	未水浸	70 ℃蒸馏水	90 ℃蒸馏水	70 ℃ 3.5%NaCl溶液	90 ℃ 3.5%NaCl溶液	破坏模式
1	4932	4398	4511	4353	4426	层间剪切
2	4766	4456	4365	4587	4210	层间剪切
3	4711	4587	4381	4431	4298	层间剪切
4	4883	4501	4366	4327	4356	层间剪切
5	4988	4323	4487	4352	4320	层间剪切

试验编号	破坏载荷/N					破坏模式
试验编号	未水浸	70 ℃蒸馏水	90 ℃蒸馏水	70 ℃ 3.5%NaCl溶液	90 ℃ 3.5%NaCl溶液	破坏模式
1	33 540	32 686	31 651	31 604	32 620	BGM
2	33 413	31 495	32 374	31 228	31 836	BGM
3	32 994	32 211	32 440	32 333	33 067	BGM
4	32 884	31 827	31 987	32 001	32 396	BGM
5	32 229	32 076	32 819	31 725	32 452	BGM