What question did this study set out to answer?

The aim is to develop a computationally efficient method for analyzing electric potential fields in CFRP materials.

March 26, 2026The Proceedings of Mechanical Engineering Congress Japan0 citationsOpen Access

Proposal of a DC Electric Potential Field Analysis Method for CFRP Ply with Complicated Fiber Arrangements

TMTomoya MURATAOkayama University TUTakeshi UemoriHiroshima University NTNaoya TADA

Key Points

The aim is to develop a computationally efficient method for analyzing electric potential fields in CFRP materials.
Introduced a relaxation method for electric potential analysis.
Applied current in the through-thickness direction of CFRP.
Compared results with conventional finite element analysis.
The relaxation method showed lower computational costs compared to finite element methods.
Results from the proposed method aligned with finite element analysis, validating its effectiveness.
The approach allows for large-scale analysis of CFRP structures with complex fiber arrangements.

Abstract

Carbon fiber reinforced plastics (CFRP), which are widely used in the aerospace industry, experience strength degradation due to failure mechanisms such as interlaminar delamination and fiber breakage. One non-destructive testing method for CFRP is the DC potential difference method. However, conventional finite element method–based simulations require substantial computational resources, rendering large-scale analyses of CFRP structures with numerous carbon fibers impractical. In this study, we apply a relaxation method with lower computational cost to enable large-scale electric potential field analysis in CFRP under the assumption that current is applied in the through-thickness direction. The validity of the proposed approach is evaluated by comparing the results with those obtained from finite element analysis.

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