PSI - Issue 4

Hans-Jakob Schindler / Procedia Structural Integrity 4 (2017) 48–55 Author name / Structural Integrity Procedia 00 (2017) 000 – 000

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Fig. 1: Cut of actual length a introduced in a plate in order to determine the residual stress distribution on the x-axis from strain measured at M1 and M2 (schematic). If only the near-surface stress profile (i.e. on x <

4. Examples of measured residual stress profiles

Fig. 2 (a) shows a section of a railway axle made of normalized steel with a diameter of 145 mm in the cylindrical part, including the transition to the conical seat of the wheel. The local geometry is shown in Fig. 2(b)). The residual stress is measured along the x-axis, which corresponds to the plane of maximum stresses due to the service load.

(a)

(b)

wheel

cut

axle

x

Fig. 2: (a) Section of an axle, including the transition region between the cylindrical and the conical part; (b) Geometry of the axial cross-section at the transition region between cylindrical and conical part, with location of the cut of depth a along the x-axis