09:40 Feb-20-2002 crack depth measureing by tip method
>I'm trying to measure cracks depth by tip >diffraction method in a steel thin plate. > > >My questions are: >1. What angle is the best for this job and why? > >2. Is the 180 degree phase chenge between root and tip >signals, for 45 degree refracted wave or for all >angles? > >3. would you please send me some theoretical >literature(if its possible)or reference? > > > best whishes >
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