Piezoelectric sensor for in-situ measurement of stress intensity factors

被引：3

作者：

Baecker, D. ^{[1
]}

Haeusler, C. ^{[1
]}

Kuna, M. ^{[1
]}

机构：

[1] Tech Univ Bergakad Freiberg, D-09596 Freiberg, Germany

来源：

SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL, MECHANICAL, AND AEROSPACE SYSTEMS 2011 | 2011年 / 7981卷

关键词：

fatigue crack growth; fracture mechanical sensor; K - factor sensor; structural health monitoring; PVDF; PVDF-FILMS; CRACKS;

D O I：

10.1117/12.881094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method for monitoring fatigue cracks in thin-walled shell-structures using piezoelectric polyvinylidene fluoride (PVDF) films is presented. By means of a spatially resolved measurement, it allows the simultaneously localization of the crack tip and determination of the K - factors by solving the resulting inverse problem. In previous publications [1], [2] only the K-I - factors as well as the position of the crack tip could be determined with sufficient accuracy but not the K-II - factor. Therefore, the concept will be tested and verified using the example of a crack in an infinite plate. From that we deduce some recommendations for the electrode placement and the solution of the inverse problem. In addition, a first experiment of a cracked aluminum specimen is reported.

引用

页数：10

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