A strategy for accommodating residual stresses in the assessment of repair weldments based upon measurement of near surface stresses

Recent advances in residual stress measurement

“…The overall proximity of the structure to failure is generally represented in terms of the distance of the point (K r , L r ) to the assessment locus on a failure assessment diagram (FAD). For example, the R6 Option 1 FAD is represented by [1,3] K r ¼ ½1 þ 0:5L 2 r À0:5 ½0:3 þ 0:7 expðÀ0:6L 6 r Þ.…”

Spatial variation of residual stresses in a welded pipe for high temperature applications

“…It is important to understand the relationship between measurements made at different length-scales and how they may be deployed in integrity assessments. As described by McDonald et al [12,13], if an understanding of the distribution of macro-stresses and their magnitude is achieved from measurement, it is possible to use a combination of measurement and calculation of these stresses in a strategy for underwriting the design and operation of the plant.…”

Measuring and modelling residual stresses in a butt-welded P91 steel pipe

“…Further details of the technique may be found elsewhere [8], [9]. The deep-hole drilling (DHD) method was used to measure the residual stress in the centre of the weld, through the thickness of the pipe.…”