Compensation Speckle Pattern Interferometry in Material Testing Techniques

The main advantage of implementing optical interferometric methods in experimental mechanics comparing with traditional approaches resides in a whole-field character of the measurement procedure. This fact is of great importance in the field of high-precision material testing. First, an availability of interferometric fringe patterns, which are obtained as a mechanical response of the specimen under study on external loading, allows us to estimate a degree of correspondence between real deformation state and a model used for converting initial experimental parameters into required values of elastic constants. Second, whole-field data may be used for increasing measurement accuracy on a base of least square method.