Measurement of the normal displacement field (a) of the test objects and calculation of fields of the 1st (b) and 2nd (c) derivatives in respect to the coordinate in a given direction.

Object — a duralumin plate 300x200x2 mm (a fragment), loading — a static concentrated force in the center (deflection).

Obtaining source information for stress-strain state analysis of the reverse side of
the hollow compressor blade under pressurization