采用专门设计的非常规交替式疲劳试验,对碳纤维三维整体编织C/C复合材料在拉-拉循环载荷作用下的力学行为进行了探索性研究.试验中发现,在C/C复合材料内部热解碳沉积层的某些微区域形成了丝绸状“皱褶”.进一步对试验过程进行了热力学理论分析,阐明了产生皱褶现象的原因主要是疲劳振动过程导致热解碳沉积微层之间发生微摩擦,并进而形成高温微区所致. A specially designed unconventional alternating fatigue test was used to investigate the mechanical behavior of three-dimensional carbon-fiber braided C / C composites subjected to pull-pull cyclic loading. It was found that in the C / C composites, Some micro-regions of the de-carbonized sediments formed silky “folds.” Further thermodynamic theoretical analysis of the test process clarified that the causes of wrinkles are mainly caused by fatigue and vibration processes that occur between layers of pyrolytic carbon deposits Micro-friction, and thus the formation of high-temperature micro-area.