科研之友
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摘要
A new electrical potential method is proposed in the present study. Several electrodes to measure electric voltage are mounted on a carbon-fiber-reinforced-polymer beam surface. Direct current is applied and electric voltage changes are measured at each electrode. Comparing measured results with analytical results obtained from the anisotropic electric potential function, the electric conductance ratio can be obtained. Using this electric conductance ratio, the differences between the electric voltages on the surface are small and hence scaled to observe these variations. These differences in the electric potential enable the delamination location and delamination size to be determined. Uniform doublet analysis enables a relationship between the measured results and actual delamination location and delamination size to be established. The method is applied to some numerical analyses. A unidirectional carbon-fiber-reinforced polymer beam with a delamination crack is selected as a typical example encountered in analysis. The results show that the new method is quite effective for simple delamination crack monitoring.
- 出版日期2014-3-4
