NONDESTRUCTIVE EVALUATION USING HTS SQUID MAGNETOMETER TO DETECT IMPACT DAMAGE IN CARBON FIBER REINFORCED POLYMERS WITH DIFFERENT FIBERORIENTATION

In this work the detection of damage, due to impact loading, on CFRPs using Eddy Current technique based on HTS dc-SQUID (Superconductive QUantum Interference Device) magnetometer is presented. The main advantage of HTS SQUID magnetometer is represented by its unrivalled magnetic flux sensitivity, which allows to detect defects in materials with a very low electrical conductivity as CFRPs. The SQUID magnetic flux measurements has been compared with the results obtained using standard Eddy Current induction coil.