Estimation of Coordinates of Plane Vortex Center in Deformed Solids

In this work circulation is used as a main characteristic of local vortex structure. The algorithm of "feed points" is suggested to found coordinates of vortex center. Numerical calculation of the circulation is given. To increase the stability of the algorithm the authors introduce a parameter related to the measuring error. The dependences of absolute error on measuring error with normal and uniform probability density functions were received for rigid rotation. Monte-Carlo simulation proves that there is some range of the parameter, where exists a compromise between the probability of faults and precision. This approach is demonstrated by means of DIC technique. It was found that lines, which join the rotation centers, are coincide with boundaries of deformation structures.