Since the beginning of applications non-destructive testing/evaluation (NDT/NDE) techniques, efforts have been made consistently to improve their detection sensitivity and resolution. In present paper, factors governing lateral resolution in three major NDT viz., ultrasonic testing (UT), x-ray radiographic (XRT), eddy current (ECT) are presented. Furthermore, a review recent advances these tech...

In this paper, the non-destructive testing methods are analyzed in view of their usability in evalulation of the interlocking paving blocks’ compressive strength. Ultrasonic pulse method and impact method (Schmidt impact hammers) were chosen for testing. Testing methodology and way of the results processing considering requests of the national and European standards are described there. In addi...

Thermal non-destructive testing and evaluation of glass fibre reinforced plastic materials has gained more importance in aerospace industry due to low weight and high strength capabilities in severe environmental conditions. More recently, pulse compression favorable non-stationary excitation schemes have been exhibiting reliable defect detection capabilities in infrared non-destructive testing...

Ultrasonic testing using couplants is most popular technique for non destructive testing of solid materials. In the most non – destructive evaluation tasks such as investigation of materials whose properties may be changed by liquid contact this technique can not be used. Use of contact technique can be restricted for complex geometry structures. Also, liquid couplants cannot be used when mater...