The paper discusses a method for measuring changes in the electric resistance of a unidirectional carbon-fiber-reinforced plastic (CFRP) to detect an internal delamination. A numerical solution was obtained by the four-probe method for measuring the electric resistance. The influence of distance between electrodes on the efficiency of delamination detection was investigated. The problem was solved by the method of planning of experiments and constructing a surface response by using a 2D finite-element model. The distance between electrodes and the length of delamination were selected as parameters of the study. Distances between the internal and external electrodes for an effective detection of delaminations are determined.

中文翻译：

---

使用电阻变化法检测复合材料分层的最佳电极位置

本文讨论了一种测量单向碳纤维增强塑料 (CFRP) 的电阻变化以检测内部分层的方法。通过测量电阻的四探针法获得数值解。研究了电极间距对分层检测效率的影响。该问题是通过实验计划和使用二维有限元模型构建表面响应的方法解决的。选择电极之间的距离和分层长度作为研究参数。确定用于有效检测分层的内部和外部电极之间的距离。