ELECTROMAGNETIC-FIELD IN THE VICINITY OF A LINEAR CRACK IN A SAMPLE OF FINITE CROSS-SECTION

The problem of determining fields consisting of two current lines and of two measurement instrument lines over a nomagnetic material contain ing- a continuous seam has been solved. In order to solve this problem attached coil-type transducers were used. In carrying out the calcula tions hodographs of the input signal were constructed taking into acco unt the presence of edge effects and of continuous seams of various wi dths. The possibility of analyzing nonsymmetrical. cases when the seam is displaced relative to the transducer has been shown.