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The Slitting Method (book chapter)

Chapter 4 of Practical Residual Stress Measurement Methods.

The slitting method is a technique for measuring through thickness residual stress normal to a plane cut through a part. It involves cutting a slit (i.e., a thin slot) in increments of depth through the thickness of the work piece and measuring the resulting deformations as a function of slit depth. Residual stress as a function of through thickness position is determined by solving an inverse problem using measured deformations. The chapter describes practical measurement procedures, provides a number of example applications, and summarizes efforts to determine the quality of the residual stress information obtained with the method.

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Case studies

Residual Stress Field Team TrueSlot® – near surface residual stress measurement ExpressRS® – expedited residual stress results Strain Gaging Services Residual Stress DART – automated residual stress measurement Mechanical stress relief of aluminum alloys Rapid Forge Design Aluminum forging quench modeling Machining distortion modeling with multi-step models including residual stress

Technical Publications

Measurement-driven, model-based estimation of residual stress and its effect on fatigue crack growth. Part 2: fatigue crack growth testing and modeling Measurement-driven, model-based estimation of residual stress and its effects on fatigue crack growth. Part 1: validation of an eigenstrain model Near Surface Residual Stress Measurement Using Slotting Measurement Layout for Residual Stress Mapping Using Slitting Precision of Hole-Drilling Residual Stress Depth Profile Measurements and an Updated Uncertainty Estimator An Uncertainty Estimator for Slitting Method Residual Stress Measurements Including the Influence of Regularization Validation of a Contour Method Single-Measurement Uncertainty Estimator Repeatability of Contour Method Residual Stress Measurements for a Range of Materials, Processes, and Geometries PSR Biaxial Residual Stress Mapping Validation The Contour Method (book chapter)