国产炭纤维CCF300与T300炭纤维复合材料剪切载荷下的失效模式研究

Failure Mode Research on CCF300 and T300 Carbon Fiber Composites Subjected to Short-beam Shear Load

对国产炭纤维与T300炭纤维复合材料层合板在常温干态、常温湿态、高温干态与高温湿态四种环境条件下进行了短梁剪切实验。采用宏观和微观相结合的方法,对其剪切性能、失效模式与损伤机理进行了对比研究。结果表明:界面性能是影响纤维树脂基复合材料剪切性能与失效模式最为重要的因素,而国产炭纤维复合材料在界面性能的控制上还有待改进。因此,国产炭纤维复合材料要进一步推广应用,还需进一步改善其界面性能,尤其是高温高湿条件下的界面性能。

The short-beam shear test was conducted on the CCF300 and T300 carbon fiber composite laminate under the condition of 23°C dry, 23°C wet,130°C dry and 130°C wet. The macroshape conjunctions with the SEM image were employed for the analysis and comparison on the shear failure mode and damage mechanism of these two kinds of carbon fiber composite. The results show that the interface strength is the most important property affecting the shear strength and failure mode of carbon fiber composite. However, CCF300 carbon fiber composite shows lower property on the interface strength. Therefore, if the CCF300 carbon fiber composite want to get more widely application on the structures, it need to improve its interface strength, especially the strength that under the condition of high temperature and wet.