Design of Metamaterial Sensor for Non Destructive Testing of Aircraft Composite Skin Damage

The detection of aircraft skin is an important part of the process of aircraft design, manufacturing, and application. This paper proposes a metamaterial sensor for non-destructive detection of aircraft composite skin damage. Firstly, Using the perturbation theory, an electromagnetic nondestructive detection model of aircraft composite skin is established. Then, according to the plasmon theory, a nested multi-layer complementary split resonant ring (CSRR) metamaterial sensor is designed. Simulation using the high frequency structure simulator (HFSS), it shows that it can effectively detect defect with diameters of 2 mm and above and burial depth within 3 mm. Finally, the physical test is carried out, and the 10 mm diameter defect in the aircraft composite skin sample can be detected.