Electrical impedance changes due to cracks in planar conductive structural elements

被引：4

作者：

Armstrong, Terry W. ^{[1
]}

Sevostianov, Igor ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Mech & Aerosp Engn, Las Cruces, NM 88001 USA

来源：

STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL | 2015年 / 14卷 / 05期

关键词：

Cracks; strength; impedance; cross-property connection; high-frequency alternating current; CONNECTIONS; METALS; MODULI;

D O I：

10.1177/1475921715596221

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Changes in electrical resistivity due to cracks can be used to predict deterioration of mechanical performance caused by accumulation and growth of microcracks in electrically conductive structural elements. In this article, we utilize high-frequency alternating current to improve sensitivity of measurements through skin depth effects. Models for crack-produced changes in high-frequency alternating current are examined, and a method is proposed to correlate changes in resistivity associated with a crack due to skin depth and reactance effects. Note that only resistive impedance is linked to changes in mechanical properties through cross-property connections.

引用

页码：489 / 501

页数：13

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