Calculate the size of the arbitrary cracks using TOFD method.

Dear NDTnet Readers; I would like to establish a TOFD mathematical model for calculating the size of defects which position and orientation are not vertical to the surface.At the moment I am finding difficulties to calculate the bottom tip crack angle lying parallal with the surface. I very much appreciate any information (Book, Jouranl, etc.) from anyone.

03:17 Feb-29-2000 J. Mark Davis Teacher, And Consultant University of Ultrasonics, Birmingham, Alabama, USA, Joined Mar 2000 ^{83}

Re: Calculate the size of the arbitrary cracks using TOFD method. Dear Shamal,

I am very familar with the Time of Flight techniques using Tip Diffraction. I teach these technqiues along with ID and OD Creeping Waves and BI-modal Methods. I have written a handbook on these techniques. See NDT.Net library.

I need to understand better your question. I train inspectors with Tip Diffraction to read the flw depth directly from the UT screen.

Are you trying to determine the angle of the crack if not vertical but oriented?

I look forward to addressing your questions.

Thanks,

J. Mark Davis

Dear NDTnet Readers; : I would like to establish a TOFD mathematical model for : calculating the size of defects which position and : orientation are not vertical to the surface.At the moment : I am finding difficulties to calculate the bottom tip crack : angle lying parallal with the surface. : I very much appreciate any information (Book, Jouranl, etc.) : from anyone.