几种单向铺层碳纤维复合材料超低温下动态性质的研究

The Dynamic Characteristics of Several Unidirectional Carbon Fiber Composites at Ultra low Temperature

主要研究了几种应用于航天、航空领域的单向铺层复合材料在超低温到常温大温区范围内的动态力学性质，运用的振动模态参数识别的时域方法，研究了用这几种材料制成的悬臂梁的自由振动，给出了它们的动模量、阻尼随温度变化的曲线．通过比较低温下这几种材料动态性质的不同，研究了纤维、基体对材料模量、阻尼大小、阻尼峰的影响．

Cantilever free vibration tests for four kinds of unidirectional carbon fiber composites are carried out under different temperature conditions (4K-300K). By using the time domain vibration analysis (Ibrahim method), the dynamic mechanical properties (dynamic modulus and damping factor) are obtained. The influence of ambient temperature on the mechanical properties is examined.