Abstract and subjects
The contour method determines residual stress by cutting a specimen into two pieces and measuring surface height maps, or contours, on the free surfaces created by the cut. The average contour determines the deformations caused by residual stress redistribution and is used to compute residual stresses through an elastic finite element model of the specimen. The result is a 2‐D map of residual stress normal to the measurement plane. The contour method is particularly useful for complex, spatially varying residual stress fields that are difficult to map using conventional point wise measurement techniques. For example, the complex spatial variations of residual stress typical of welds are well‐characterized using the contour method. A basic measurement procedure is provided along with comments about potential alternative approaches, with references for further reading.