A Novel Method for Ultrasonic Evaluation of Horizontal Defects Using Time-of-Flight Diffraction

Parastoo Bagheri; Sina Sodagar; Gholamreza Rashed; Amin Yaghootian

Volume 3, Issue 4 , October 2014, , Pages 16-25


  Time-of-flight diffraction method (ToFD) is an amplitude-independent sizing method which is based on the measurement of time-of-flight of defect tip diffracted waves. Although ToFD can measure through-wall length of defect accurately, this method is not capable of measuring horizontal defect size. In ...  Read More

Resonance Ultrasonic Spectroscopy of a Nanofibrous Composite and Studying the Effect of Surface/Interface

Kobra Kalvandi; Sina Sodagar

Volume 3, Issue 1 , January 2014, , Pages 54-64


  Resonances are intrinsic characteristics of an elastic object, which are completely independent of the source of excitation. The appropriate utilization of the information contained within the resonance spectra and the identification of the resonance frequencies of the object can be used as a potent ...  Read More