Dynamic And Static Damage Detection Of Composite Structures Based On Graphene-like Sensors

Fiber reinforced composites have been widely used in the field of aeronautics and astronautics because of their advantages of high specific strength and high specific stiffness.However,due to the diversity of its components and other factors,the composite materials are prone to damage in the process of use.However,the large-scale application of ndt is hindered by the difficult disassembly of large components.In this paper,the performance of the graphene-like material MXene is analyzed and studied,and the MXene/GO sensor is prepared.In the tensile test,the change rate of resistance increases sharply when the load reaches 55 Kn,and the material is damaged,while the change rate of residual resistance increases when the load reaches 35 Kn,with the increase of the load,the change rate of the residual resistance increases and the material damage increases,and with the increase of the cycle times,the material damage accumulates In the static damage location experiment,the sensor with the closest damage distance has the largest response,which realizes the damage location of the composite material,the sensor has the ability to detect surface material damage.The damage detection,quantification and location of composite materials under static load are accomplished by the micro-nano sensor.The results show that the change rate of the sensor resistance is sensitive under the impact of 1J energy,and the change rate of the sensor resistance can not be restored to the initial value under the impact of 3J energy,the increase of resistance rate is proportional to the impact energy under the impact of different energy,which indicates that the damage of the material is cumulative.In the experiments of low velocity impact damage location,the change rate of the resistance of the impact center is the biggest,and the change rate of the sensor resistance on the damage propagation route is also relatively large,and the change rate of the other position sensors resistance is symmetrical.The damage detection,quantification and location of composite materials under dynamic load are accomplished by the micro-nano sensor.In this paper,the application of micro-and nano-sensors in dynamic and static damage detection of composite materials is realized.