The automatic system for measurement of residual stresses, MTS3000- Restan (Residual Stress Analyzer), patented, produced and developed by SINT Technology, allows full but simple residual stress testing by the hole-drilling strain gauge method. This is a fully automatic system, developed by SINT Technology, for measuring residual stresses by the ring-core strain gauge method.
The ring core method is a mechanical technique for measuring residual stresses at a specified depth in a material. The technique is based on the linear theory of elasticity and consists in milling an annular groove to isolate a part of material on which a special strain gauge rosette is applied.
The variation in strain is recorded as a function of the groove depth by computer. The ring core technique can be used on metals, ceramics and on polymers, where the linear theory of elasticity can be applied.