thanks for the answer. Perhaps this is so. My experiments with settings and comparing the results indicate this. In general, the question arose from an attempt to compare the simulation results and the readings of strain gauges measuring the strain. Of course, these results should be obtained in the coordinate system associated with the strain gauge. In a static structural analysis, this problem is solved by the introduction of a surface body, meshing by one single element. For example, how is it done here 

Unfortunately this method does not work in Explicit. I had to take the coordinates of the points and upload everything to Excel and calculate there