Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
CFRPs (Carbon fiber reinforced plastics) have been used in aerospace and automotive industries because of their light-weight and high-strength characteristics. Since various damages such as matrix cracking, fiber brake, and delamination are initiated in CFRPs, it is difficult to evaluate their sizes and locations non-destructively. The potential difference method is drawing attention as one of the appropriate non-destructive methods for CFRPs. However, the electric field analysis of CFRPs is difficult because the electric current flows only in the distributed carbon fibers and contacts between carbon fibers affect the electric resistance of CFRP. In the present research, direct-current electric potential field analyses were carried out using the finite element method and the current path was focused on. It was found from the analysis results that the electric resistance of CFRP is well correlated with the effective volume fraction of fibers.
