ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The use of multi-type joints, such as rivet joints, adhesive joints, lap joints, L-shape joints,etc., has been driven by the need for stronger and lighter structures, particularly in bridges, aerospacestructures, pipeline systems, automobiles industry. Among the multi-type joints, lap joints andL-shape joints possess a considerably important position. Moreover, in many real-field situations, it isnot accessible to such joints, and thus it gives additional difficulties to detect damages. Fortunately,the electro-impedance method based on the use of smart sensors provides special opportunities fordamage detection of such joints, which are not easy or impossible to be accessible. Thepiezoelectric-ceramic sensors which simultaneously act as an actuator and sensor are widely used forstructural health monitoring. In the high frequency range, the electro-impedance-based techniqueusing a piezoelectric-ceramic patch is very sensitive for the evaluation of the incipient and smalldamages. A large amount of experiments were executed and several conditions were imposed tosimulate real-time damage, such as the bolt loosening and bolt absence. The different indices arediscussed and executed to efficiently quantify the damage conditions. The theory behind thistechnique and the experimental investigations are presented in this paper. The analytical resultsstrongly show the detectability and reliability of this method
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.279.pdf
Permalink