Evaluating the possibility of increasing the fatigue life of welded structures by the vibratory residual stress relief method

Abstract

Residual stresses produced in the welding process mostly are harmful ones
which make the welded structures be bent and cracked, and specially reduce
the life of the structures. Applying the residual stress relief method will
increase the age of the connectors; however, when performing the process of
balancing with vibration, the connectors must be influenced by the load at a
high frequency. This will damage the connectors and may reduce their age.
However, domestic and foreign research on this issue is rarely published.
In this paper, the authors present the results of research, investigation and
comparison of the change in the fatigue life of the structures applied on the
ЭКГ-5А contact shaft after restoration welding and being processed by the
vibratory residual stress relief method.