对不同编织结构、不同编织角、不同纤维体积含量和不同应力水平下的三维编织复合材料试件进行了蠕变测试实验,研究了三维编织复合材料的蠕变性能。结果表明,三维四向编织复合材料的蠕变性能低于五向编织复合材料;编织角小的材料抗蠕变性能较好;纤维体积含量高的材料抗蠕变性能较好。并且材料所受应力水平越高,蠕变速率越高。此外,还表明幂指函数可以较好地拟合三维编织复合材料的蠕变曲线。

The creep of three dimensional braiding composites were studied by creep experiments of specimens under different braiding structure,braiding angle,fiber volume content and loads.The experiment results show that the creep resistant properties of the three dimensional four directional braiding composites are worse than five directional braiding composites.The creep resistant properties can be improved with a lower braiding angle and higher fiber volume fraction.Furthermore,the creep rate is increased with the increasing of load.In addition,it is found that the power function is the best fit equation of creep curve for 3-D braiding composites.