Transverse Electrical Resistivity Evaluation of Rod Unidirectional Carbon Fiber-Reinforced Composite Using Eddy Current Method

This paper proposes a simple approach to evaluate a transverse electrical resistivity of a rod unidirectional carbon fiber-reinforced composites (UD-CFRCs). The method is based on eddy current technique. The model is associated with inverse problem method that consists of minimizing the difference between the computed and measured resistances. The ant colony algorithm which is a kind of heuristic minimizing algorithm based on population exploration is used to get transverse electrical resistivity. The findings of the work are summarized as the following. First, it was demonstrated that the induced power in the UD-CFRC and the resistance of the coil are independent of the value of longitudinal resistivity. Then, the electrical resistance is computed using direct problem which is formulated with the 2-D axisymmetric finite-element method. After that, the identified resistivity, which obtained with the inverse problem, is introduced in the direct problem to compute resistance. Finally, the confrontation between the computed resistance and the measured one shows a significant concordance between the two.