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The blind-hole method is widely applied in measuring the residual stress of metal component surfaces. In this paper, the Monte Carlo method is used to analyze the uncertainty of strain release coefficients which are influenced by the unreasonable assumptions made in the process of residual stress measurement. Based on a theoretical formula, MATLAB programs were designed to evaluate the error dispersion of the strain release coefficients for the blind-hole method. Compared with the values calibrated by test, it is shown that the uncertainty of the strain release coefficients can be evaluated reasonably by the use of the Monte Carlo method. In addition, the values predicted by the Monte Carlo method are more meaningful and suited to practical application.

Uncertainty of strain release coefficients for the blind-hole procedure evaluated by Monte Carlo simulation