The Determination of Uncertainties in Residual （在剩余不确定性的决心）.pdf

S M T Standards Measurement Testing Project No. SMT4-CT97-2165 UNCERT COP 15: 2000 Manual of Codes of Practice for the Determination of Uncertainties in Mechanical Tests on Metallic Materials Code of Practice No. 15 The Determination of Uncertainties in Residual Stress Measurement (Using the hole drilling technique) R. Oettel Siempelkamp Prüf- und Gutachter-Gesellschaft mbH PF 10 02 63 DE-01072 Dresden GERMANY Issue 1 September 2000 S M T Standards Measurement Testing Project No. SMT4-CT97-2165 UNCERT COP 15: 2000 CONTENTS 1 SCOPE 2 SYMBOLS AND DEFINITIONS 3 INTRODUCTION 4 A PROCEDURE FOR THE ESTIMATION OF UNCERTAINTY IN RESIDUAL STRESS Step 1 - Identifying the parameters for which uncertainty is to be estimated Step 2 - Identifying all sources of uncertainty in the test Step 3 - Classifying the uncertainty according to Type A or B Step 4 - Estimating the standard uncertainty for each source of uncertainty Step 5 - Computing the combined uncertainty uc Step 6 - Computing the expanded uncertainty U Step 7 - Reporting of results 5 REFERENCES APPENDIX A Mathematical formulae for calculating uncertainties in residual stress measurement by the hole drilling method APPENDIX B A worked example for calculating uncertainties in residual stress measurement by the hole drilling method Page 1 of 18 S M T Standards Measurement Testing Project No. SMT