The use of a combination TNDT/SNDT (Thermographic nondestructive testing/ Shearographic nondestructive testing) system for the inspection of large composite structures is discussed. While each of the techniques may find defects on a particular composite structure, each may show types or sizes of defects that the other does not. The two methods complement one another well. A combination TNDT/SNDT system would provide the benefits of both techniques.
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