Determination of Residual Stress This standard specifies test procedures for the determination of residual stress near the surface of isotropic linear elastic materials. This standard is suitable for the determination of residual stress where the plane stress gradient is small. Stress is divided into "uniformly distributed" stress that changes little along the depth and "non-uniformly distributed" stress that changes greatly along the depth. Test workpieces are divided into "thin" workpieces with a thickness smaller than the drilled hole diameter and "thick" workpieces with a thickness greater than the drilled hole diameter. Uniform stress can be tested using both thin and thick workpieces, while non-uniform stress can only be tested using thick workpieces. The test range drilling strain method can measure the plane residual stress near the surface of the workpiece, that is, the magnitude of the local residual stress within the drilling boundary range. This test method is applicable only to linear elastic materials. Theoretically, due to stress concentration, if the stress value of the residual stress (equibiaxial) exceeds 0% of the yield limit or the shear stress in any direction exceeds 25% of the yield limit, local yielding will occur at the edge of the drill hole, but In practice, it was found that this method is still applicable when the residual stress does not exceed 60% of the material's yield limit. Workpiece damage. Other mechanical methods for measuring residual stress will cause serious damage to the workpiece. However, the damage caused by the drilling strain method is local, and in most cases will not significantly affect the continued use of the workpiece, so it is called "semi-destructive". test methods. However, the drilling strain method will also cause minor damage to the workpiece, so this method is only suitable for working conditions where the workpiece is consumable or small shallow holes will not significantly affect the continued use of the workpiece. Safety Technology This standard is not a safety technical specification. It is the responsibility of the user of the standard to establish appropriate health and safety practices and determine its scope of application before using this standard.
SL 499-2010 Referenced Document
ASTM E251 Standard Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages
CB 3395-1992 Residual Stress Test Method Drilling Strain Release Method
SL 499-2010 history
2010SL 499-2010 Standard test method for determining residual stresses by the hole-drilling strain-gage method (ASTM E837-08,IDT)