Compact Calibration Data for Hole-Drilling Residual Stress Measurements in Finite-Thickness Specimens
| Autor: | Gary S. Schajer |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Polynomial
Materials science Mechanical Engineering Aerospace Engineering Drilling Geometry 02 engineering and technology Gauge (firearms) 021001 nanoscience & nanotechnology Table (information) 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Residual stress Solid mechanics Calibration 0210 nano-technology Finite thickness |
| Zdroj: | Experimental Mechanics. 60:665-678 |
| ISSN: | 1741-2765 0014-4851 |
| DOI: | 10.1007/s11340-020-00587-4 |
| Popis: | The conventional way to present Integral Method calibration data for hole-drilling residual stress measurements is in the form of a large triangular table of numbers. In the common case where 20 drilling steps are used for the hole-drilling measurement, 231 numerical coefficients are needed. While such tables are effective, their bulk inhibits their use for other than the most common experimental arrangements; the convenience and usefulness of the hole-drilling method would be much extended if the bulk of the calibration data could be reduced. Here, a two-variable polynomial formulation is proposed to represent the hole-drilling calibration data. It comprises 15 numerical coefficients and provides calibration data with average accuracy within 1%, with occasional outliers reaching around 2%. The compactness of the calibration stimulated exploration of hole-drilling response beyond the conventional “thick” specimen case, also to include finite thickness specimens down to very thin (through-hole) geometries. Tables of calibration data are provided here for ASTM E837 Type A, B and C strain gauge rosettes, for various hole diameters, for conventional “thick” specimens, and for finite thickness specimens down to the through-hole case. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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