Vibratory stress relief - an investigation of the torsional stress effect in welded shafts

In this study the effect of torsional vibration on residual stresses was in vestigated. Three types of shaft specimen were processed, namely (a) a homo geneous shaft, (b) a shaft welded on a circumferential line and (c) a spot- welded shaft. The first two types of shaft showed some redistribution in th e residual stresses under applied torsional loads. On the spot-welded shaft s the residual stresses were found to decrease significantly at a very low level of vibration induced stress.