Circumferential Rosette Design for Extended Depth Hole-Drilling Residual Stress Measurements
| Autor: | Gary S. Schajer |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Strain (chemistry) Mechanical Engineering Aerospace Engineering 02 engineering and technology Gauge (firearms) 021001 nanoscience & nanotechnology Finite element method Rosette (botany) 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Residual stress Solid mechanics Composite material 0210 nano-technology Radial stress Strain gauge |
| Zdroj: | Experimental Mechanics. 60:1265-1274 |
| ISSN: | 1741-2765 0014-4851 |
| DOI: | 10.1007/s11340-020-00660-y |
| Popis: | 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. 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. A finite element analysis was undertaken to model the influence of various geometrical factors on the depth response of a strain gauge rosette. 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. A new circumferential strain gauge rosette design based on the presented analysis is proposed for use where extended depth measurements are desired. |
| Databáze: | OpenAIRE |
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