| タイトル | Detection of Delaminations in Composite Beams Using Piezoelectric Sensors |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940032449 |
| 著者（英） | Birman, Victor; Hopkins, Dale A.; Saravanos, Dimitris A. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1994-06-01 |
| 言語 | eng |
| 内容記述 | This paper investigates the feasibility of a proposed technique for detecting delamination using piezoelectric layers or patches embedded or bonded to a composite structure. Variations in the voltage generated in the piezoelectric layers indicates the presence and location of delamination, when the structure is excited either externally or via actuators. The theoretical foundations of a method for predicting the dynamic response of delaminated composite beams with piezoelectric layers are described. The governing equations are presented for the case of external vibroacoustic excitation, as well as, for the case of locally induced vibrations by some of the embedded piezoelectric elements. An exact solution is developed within the limits of linear laminate theory. Applications illustrate the feasibility of delamination detection in cantilever beams. The results illustrate that the proposed technique may provide accurate detection of the presence, size, and location of a delamination. |
| NASA分類 | COMPOSITE MATERIALS |
| レポートNO | 94N36956
NASA-TM-106611
E-8894
NAS 1.15:106611
AIAA PAPER 94-1754 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
