Forum Technical Discussions Re: creeping wave? Posted by: J. Mark Davis (PID_553), E-mail: Address, on July 08, 2008 at 13:33 : In Reply to: creeping wave? posted by : john howard , E-mail: Address, on July 08, 2008 at 01:11 : John, Yes, there is a Creeping Wave. The term Creeping Wave is not a new sound source. It is a L-wave energy that skims or creeps along the opposite surface from the scanning surface. The Creeping wave travels a short distance ( about 2 mm to 12 mm) to detect a planar defect at the ID surface. It is The Creeping Wave is the result of a shearwave which mode converts to an L-wave from the ID surface. See Dr. Wustenbergs Doctorate 1977 Thesis. There are numerous papers on the wave physics and the resulting effects of these critically refracted L-waves and shear waves. The main point is that Creeping Waves are very effective for detection, charcaterization and sizing of Cracks. Sincerely, J. Mark Davis ----------- Start Original Message ----------- : Can anyone help? Is there or is there not a 'creeping wave'? Can it be proven either way? ------------ End Original Message ------------ Follow Ups: Re: creeping wave? John Howard 00:06 Jul-10-2008 (1) Re: creeping wave? Slawomir Mackiewicz 14:37 Jul-10-2008 (0) Re: creeping wave? Ed Ginzel 15:39 Jul-08-2008 (1) Re: creeping wave? Bill Blanshan 20:13 Jul-08-2008 (0) Post a Followup: Name: E-Mail: Subject: Comments: ----------- Start Original Message ----------- : John, : Yes, there is a Creeping Wave. : The term Creeping Wave is not a new sound source. It is a L-wave energy that skims or creeps along the opposite surface from the scanning surface. The Creeping wave travels a short distance ( about 2 mm to 12 mm) to detect a planar defect at the ID surface. It is : The Creeping Wave is the result of a shearwave which mode converts to an L-wave from the ID surface. : See Dr. Wustenbergs Doctorate 1977 Thesis. There are numerous papers on the wave physics and the resulting effects of these critically refracted L-waves and shear waves. : The main point is that Creeping Waves are very effective for detection, charcaterization and sizing of Cracks. : Sincerely, : J. Mark Davis : : : Can anyone help? Is there or is there not a 'creeping wave'? Can it be proven either way? ------------ End Original Message ------------ Optional Link URL: Example: "http://www....html". Alternative write "http://www.ndt.net/wshop/attach/filename.htm" if you transfered a filename.htm via FTP Page Title: is important! Optional Image URL: http://www....gif Attention! Please click the button only once. This may take a moment to process Forum Technical Discussions Help