Incremental Borehole Method

  Internal stress measuring system  and expansion measuring tape Copyright: © IOT Internal stress measuring system (a) and expansion measuring tape (b)

Residual stress is a concomitant of manufacturing processes. For components, it can be both advantageous and disadvantageous. Critical load conditions occur when load and residual stress accumulate. Contradictory signs of tension have a compensatory effect. The incremental borehole method allows the experimental determination of the depth distribution of the residual stress even on complex assembly groups to evaluate the load-balanced material behaviour.

Technical data:

Parameter, [unit] Value

Turbine rotation speed, n [U/min]

300,000
Feed rate, v [mm/min] 0.03 - 60
Depth resolution, a [µm]

10