Strain Releasing Factor Amendment of Hole Edge under the Yield Status
Author of the article:
Author's Workplace：
Key Words：Blindhole method; Yield status; Welding residual stress; Plastic deformation correction; Finite element method (FEM)
Abstract：The residual stress measurement formulas based on blindhole method are derived from flexible conditions. In order to measure materials residual stress in the yield status, blindhole releasing method must be amended to eliminate hole edge plastic deformation affects, which influences the measurement accuracy. By coefficient A, B correction method based on specific energy S modification according to hole edge shape, the measurement accuracy of welding residual stress is improved and the measurement scale is extended. Comparing to other methods, this combined finite element numerical calculation method is much easier in practical engineering applications.
