The opening or closing of a radial saw cut in a railroad car wheel has been used to estimate the state of residual stress in the wheel. If the cut opens, it is assumed that a tensile circumferential stress was present in the rim of the wheel. If the cut closes, compressive circumferential stress is assumed. A good estimate of the magnitude and distribution of the residual stresses in a wheel can be obtained from a 3-D finite element calculation using the displacement data along the length of the cut. The wheel with the saw cut is represented by a finite element mesh and displacments are imposed on the free surface of the cut which are sufficient to restore it to the original state. The resulting stresses calculated on the free surface represent the original residual stress field within the wheel. Three examples in the use of this technique are presented.
Calculation of residual stresses in wheels from saw cut displacement data
Berechnung der Eigenspannungen in Raedern aus Saegeschnittverschiebungsdaten
ASME-Papers ; Nov ; 1-5
1985
5 Seiten, 10 Bilder, 6 Quellen
Conference paper
English
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