湿热环境下复合材料基于碳纳米纸传感器的低速冲击损伤监测

Low-speed impact damage monitoring of composite materials based on Carbon nano-paper sensor in hot and humid environment

针对湿热环境下复合材料的低速冲击损伤监测,将碳纳米纸传感器与复合材料一体成型,对湿热处理后的复合材料进行低速冲击。在由低到高的能量冲击下,传感器的电阻变化率呈阶梯性变化,多次冲击后传感器性能依旧稳定。此外,在冲击位置以及材料裂纹扩展方向传感器的电阻变化率比其他位置大,传感器展现了优良的冲击损伤定位能力。结果表明,碳纳米纸传感器能够在湿热环境下检测低速冲击损伤,并可以通过传感器阵列进行低速冲击损伤定位。

In order to monitor the low-speed impact damage of the composites under the hygrothermal environment,the carbon nano-paper sensor and the composites were molded together to carry out the low-speed impact on the composites after the hygrothermal treatment.Under low-to-high energy impact,the resistance rate of the sensor changes in a step-by-step manner,and the performance of the sensor remains stable after repeated impact.In addition,at the impact position and the direction of material crack propagation,the change rate of resistance of the sensor is larger than that of other positions.The results show that the carbon nano-paper sensor can detect the low-speed impact damage in the hygrothermal environment,and locate the damage by the sensor array.