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Proceedings Paper

Crack-growth detection using a surface-mounted piezotransducer array
Author(s): Nikolas Rajic; Stephen C. Galea; W. K. Chiu
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Paper Abstract

This paper reports on an experimental program aimed at assessing the feasibility of monitoring crack growth by means of a surface-mounted piezotransducer array. The host structure is interrogated using lamb-waves generated and sensed by elements in the array. An example is described involving a uniaxial edge-notched specimen subject to cyclic loading where the array is shown to be capable of detecting on a sustained basis crack growth increments of less than 0.1 mm. Although the piezoceramic elements were exposed to cyclic stress there was no measurable indication of element degradation,indica ting good fatigue durability properties under the loading regime considered. Experimental results are also shown that demonstrate a strong crack-state dependence,hig hlighting the need for care when interpreting signals from the piezotransducers.

Paper Details

Date Published: 21 March 2001
PDF: 7 pages
Proc. SPIE 4235, Smart Structures and Devices, (21 March 2001); doi: 10.1117/12.420887
Show Author Affiliations
Nikolas Rajic, Defence Science and Technology Organisation (Australia)
Stephen C. Galea, Defence Science and Technology Organisation (Australia)
W. K. Chiu, Monash Univ. (Australia)

Published in SPIE Proceedings Vol. 4235:
Smart Structures and Devices
Dinesh K. Sood; Ronald Albert Lawes; Vasundara V. Varadan, Editor(s)

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