Targeted method of statistical processing of experimental results of defected pipes rupture tests

Keywords

corrosion defect, residual strength, pipe, internal pressure, model error.

Cite as

Orynyak І. V., Mazuryk R. V., Marchenko V. V., and Oryniak А. І. Targeted method of statistical processing of experimental results of defected pipes rupture tests. Physico­chemical Mechanics of Materials. 2022. 58(2), 049-058.

Abstract

Statistical methods for a comparative analysis of the accuracy of formulas to assess resi­dual strength of ductile pipes with rectangular surface defects are developed. In the avai­lable approaches the accuracy of formulas is established for a whole range of experiments as one common value, while in this study – separately for each given defect size (point of interest). For each experiment its weight is calculated, not larger than unity, for each point of interest. Statistical analysis of formulas accuracy is performed for each point of interest. This allows us to smooth experimental errors and to determine the error of the formula itself more accurately.

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