ISSN:
1013-9826
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 wave reflection coefficients of damage such as cracks, notches and slots in otherwiseuniform beams depend on frequency and on the size of the damage. Experimental results arepresented for the wave power reflection coefficients of transverse slots of various depths sawn intoa number of beam specimens. These results are compared with a conventional spring model toestimate the depth of the slot. The method appears to work well for larger slot depths (greater thanabout 30% of the thickness of the beam) and at higher frequencies, allowing their existence to beinferred and their size to be estimated. This is due to the fact that the reflection coefficients arelarger in these regimes. For smaller slots or at low frequencies, noise and experimental errors, suchas miscalibration errors and ill-conditioning, become more significant
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.347.193.pdf
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