Porosity Evaluation

Laser ultrasonic method of composite materials porosity diagnostics based on the analysis of a scattered optoacoustic signals in the sample in the case of one-sided access. Ultrasonic attenuation due to porosity could be measured by the laser ultrasonic spectroscopy. There is a clear dependence between the porosity (measured by X-ray tomography) and characteristics of the ultrasonic attenuation of the resonance peak (width and maximum).
 


The results of laser ultrasonic inspection of polymer composite material samples are demonstrated below.
 


The results of laser-ultrasonic structuroscopy are demonstrated below. It allows to control porosity with unilateral access to the investigated object.