A novel development of the thermoelastic stress analysis (TSA) technique for testing mechanical components under the random load condition is presented. The method proposed does not need a reference signal to reduce the amount of noise in the thermoelastic images, allowing an easier application of the TSA to the real working condition of mechanical components. Noise is filtered out by means of a numerical algorithm based on the hypothesis that a random thermoelastic signal can be approximated with a harmonic signal. Some notched specimens under the pseudo-random load condition have been tested using either the proposed method or a commercial one (DeltaTherm. data processing procedure). Results obtained with both methods are in good agreement.
|Titolo:||A novel signal processing method for TSA applications|
|Data di pubblicazione:||2005|
|Digital Object Identifier (DOI):||10.1088/0957-0233/16/11/017|
|Appare nelle tipologie:||1.1 Articolo in rivista|