Residual Stress Analysis Using the Hole-Drilling Method and Geometry-Specific Calibration Functions

摘要

Due to the fact that no analytical solution exists to determine residual stresses in components with geometrical deviations from an ideal plate with the well known semi-destructive incremental hole-drilling method, calibration functions are required. Currently, such available functions, generated in an experimental or numerical manner are strictly speaking only valid for the reference case of a wide and thick plate and are only applicable if the surrounding field of the geometry at the measurement point is similar to the ideal one.Consequently, accuracy and reliability of assessing residual stresses by means of the incremental hole-drilling method can be improved if geometry specific calibration functions adapted to real geometries are used. This work deals with the determination of specific calibration functions by means of numerical simulations according to the MPA II standard (differential method) for three different components, violating the geometric restrictions of the reference.