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采用扫描电子显微镜(SEM)和软X光射线技术,分析了单向聚酯帘线橡胶复合材料的疲劳损伤机理。结果表明,该材料的微观损伤主要有帘线——基体脱粘、基体裂纹、帘线中纤维的损伤与断裂三种类型。材料微观损伤不断累积发展成为宏观的帘线断裂或基体纵向剪切,最终导致材料失效。材料的损伤过程伴随着温度的不断升高,循环频率对橡胶复合材料的损伤累积有明显的影响。
The fatigue mechanism of unidirectional polyester cord rubber composites was analyzed by scanning electron microscopy (SEM) and soft X-ray technique. The results show that the microscopic damage of this material includes three major types: cord-matrix debonding, matrix crack, and fiber damage and breakage in the cord. The cumulative development of microscopic damage to the material has developed into macroscopic cord breakage or longitudinal shear of the substrate, eventually leading to material failure. The damage process of the material accompanied by the rising temperature, the cycle frequency of the rubber composite damage has a significant impact.