PPrism residual stress is a measurement technology that dramatically improves the ability to make quick, accurate residual stress measurements. The technology utilizes stress-relaxation technique, where a small hole is drilled into the material thus relaxing the stress along the hole boundaries. The resulting surface distortion can then be measured precisely using electronic speckle pattern interferometry system (ESPI)
DThe software integrates drilling and imaging. The user can perform measurements fully automatically for a list of depth increments set in advance, or control each step individually and change depths on-the-go. Image acquisition is automatic in the former case. Stress calculations are possible for any combination of the depths drilled, including as single-depth data. The data are output in graphical and in table form.
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