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Health monitoring technique for truss structure with PZT patches : estimation of fastening condition of bolts and damage indices

Transactions of the Japan Society of Mechanical Engineers. C Volume 69 Issue 679 Page 586-593
published_at 2003-03
2010010185.pdf
[fulltext] 921 KB
Title
圧電素子を用いたトラス型構造物のヘルスモニタリング技術 : ボルトの締め付け状態の推定ならびに損傷評価指数
Health monitoring technique for truss structure with PZT patches : estimation of fastening condition of bolts and damage indices
Creators Jiang Zhongwei
Creators Takeuchi Yasutaka
Creator Keywords
structural health monitoring truss structure PZT patches piezoelectric impedance response looseness of bolts damage assessment indices
This work presents a study on development of a practical and quantitative technique for assessment of the structural health condition by piezoelectric impedance-based technique associated with longitudinal wave propagation method. A truss structure constructed by aluminum beams and piezoelectric patches is investigated experimentally for estimation of the fastening condition of bolts which is supposed to be a kind of infancy damage. The bolt fastening condition is adjusted by torque wrench. In order to estimate the damage condition numerically, three damage indices, impedance peak frequency shift ΔF, peak amplitude ratio δ and quality factor ratio γ, are proposed in this paper. Furthermore, an assessment method is described for estimation of the damage by using these three damage indices. As an example, estimation of fastening torques on the bolt is illustrated. With a plenty of experiment results, the damage indices proposed in this work are validated useful for assessment not only of the looseness of bolts and also for any other structural infancy damage, such as the concentrated stress, small crack and so on.
Languages jpn
Resource Type journal article
Publishers 日本機械学会
Date Issued 2003-03
Rights
Copyright: 日本機械学会 (The Japan Society of Mechanical Engineers)()
File Version Version of Record
Access Rights open access
Relations
[ISSN]0387-5024
[NCID]AN00187463
[isVersionOf] [URI]http://www.jsme.or.jp/publish/ronbun/
Schools 大学院理工学研究科(工学)