Figure 13. Virtual gage in a form of line used in ISTRA

From

The Possibilities in Use of ESPI Method by Investigation of Strain Fields of Specimen with Stress Concentrator

Martin Hagara, Róbert Huňady, František Trebuňa

American Journal of Mechanical Engineering. 2016, 4(7), 429-434 doi:10.12691/ajme-4-7-36