National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Non-linear acoustic spektoscopy and new methods of flaw detection
Převorovský, Zdeněk
In the paper, the non-linear techniques, known as NEWS (Nonlinear Elastic Wave Spektroscopy) and their modifications are briefly described .
Kalibracni vzorky pro nelinearni ultrazvukovou spektroskopii
Převorovský, Zdeněk ; Van Den Abeele, K.
The experimental procedures are described, based on nonlinear elastic wave spectroscopy (NEWS). Special testing samples - PMMA blocks with laser induced cracks - are designed to verify that procedures. Opening of cracks enables kissing effect of their faces at relatively small amplitude of dynamic excitation which plays substantial role in Nonlinear Wave Modulation Spectroscopy method (frequency mixing) where it causes creation of side lobes in frequency spectra.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.