Abstract
A CFRP laminate has high specific strength and stiffness compare to the conventional metals although it is very sensitive to the impact. The low impact creates a delamination and results in the deterioration of the structural reliability. The present study employs two-stage electric potential change method to identify the delamination in the CFRP laminate. The effectiveness of the method was shown by means of FEM analyses in the previous study although it has not yet examined experimentally. In the method, delamination is estimated using response surfaces. This requires many times of experiments to obtain learning data. The concept of equivalent electrical conductivity is introduced to reduce the numbers of experiments. The response surfaces are made by the result of FEM analyses using the equivalent electrical conductivity. The actual delaminations are successfully estimated using the response surfaces. The numbers of experiments are remarkably reduced.
