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The multiple-incremental hole drilling method

Das Multiple-Inkrementelle Bohrlochverfahren. Messunsicherheiten bei der Eigenspannungsermittlung quantifiziert
: Pfeiffer, W.; Wenzel, J.

Preprint urn:nbn:de:0011-n-861586 (164 KByte PDF)
MD5 Fingerprint: 30e2412113e5b374db93401dc708edf1
Created on: 10.4.2009

MP materials testing 50 (2008), No.9, pp.495-499
ISSN: 0025-5300
Journal Article, Electronic Publication
Fraunhofer IWM ()
hole drilling method; multiple strain recording; residual stress; numerical model

Up to now the measurement uncertainties of residual stress determinations using the incremental hole-drilling-method had to be assessed by repeating the measurement at equivalent measurement spots or specimens. Often, the requirements for those repetitions are not given or the effort is spared. The determination of the stress state plus the related measurement uncertainty by only one course of measurement is the main feature of the Multiple-Incremental Hole Drilling Method developed by the Fraunhofer Institute for Mechanics of Materials IWM. The method is based on the generation and processing of multiple strain recordings for each depth increment through a stepwise enlargement of the hole in lateral direction. The results show that the new method allows revealing and quantifying measureme nt uncertainties of the determined stress-depth profile.