Residual stress laboratory and stress analysis center
Residual Stress Measurement
What are residual stresses and how are they caused
All the stresses that exist in materials are termed residual stresses.
Residual stresses can originally exist in a component and naturally add to the stresses induced by applied loads; they also can appear without the application of any external load.
Residual stresses limit the loading capacity and the safety of mechanical components during operation and in some applications it is necessary to be able to quantify these stresses.
Residual stresses can be caused by the following main factors:
non-uniform heating or cooling of a component during manufacturing and fabricating processes, like casting, welding, molding, heat treatment
machining processes to remove shavings or plastic deformation, like turning and forging
through or surface heat treatments, like tempering or welding
sand-blasting or shot-peening
SINT Technology produced and developed the Restan-MTS3000 system, an automatic device for measuring residual stresses by the hole-drilling strain-gage method, in accordance with the ASTM E837 standard.
The MTS3000 is able to measure the residual stresses into METALS and other kinds of materials, both in the lab and on site.
MTS3000 – Restan: Residual stress measurement system
The MTS3000 – Restan is an automatic system for measuring residual stresses by the hole drilling method.
The system has been produced and developed by SINT Technology and it consist of an optical-mechanical system with an electronic control unit, a control software and a reprocessing calculation software EVAL. The complete measuring chain is fully compliant to the ASTM E837-13 standard.