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Erschienen in: Experimental Mechanics 9/2020

17.08.2020 | Research paper

Circumferential Rosette Design for Extended Depth Hole-Drilling Residual Stress Measurements

verfasst von: G. S. Schajer

Erschienen in: Experimental Mechanics | Ausgabe 9/2020

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Abstract

Background

The radial design for strain gauge rosettes used for hole-drilling residual stress measurements was established over 50 years ago and has remained almost unchanged since then. The design was developed to promote strain sensitivity, but was made without regard for ability to identify interior stresses. Consequently, only near-surface residual stresses can be identified.

Objective

The aim of this study is to investigate rosette geometric features that may be refined to enable a significant increase in ability to identify interior stresses without significant loss of strain sensitivity.

Methods

A finite element analysis was undertaken to model the influence of various geometrical factors on the depth response of a strain gauge rosette.

Results

It was found that that circumferentially oriented strain gauges allow residual stress measurements to be made to twice the depth of traditional radial strain gauges, with only minor loss in strain sensitivity.

Conclusions

A new circumferential strain gauge rosette design based on the presented analysis is proposed for use where extended depth measurements are desired.

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Metadaten
Titel
Circumferential Rosette Design for Extended Depth Hole-Drilling Residual Stress Measurements
verfasst von
G. S. Schajer
Publikationsdatum
17.08.2020
Verlag
Springer US
Erschienen in
Experimental Mechanics / Ausgabe 9/2020
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI
https://doi.org/10.1007/s11340-020-00660-y

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