Application of deep hole drilling to the measurement and analysis of residual stresses in steel shrink fitted assemblies

Residual stress measurement of shrink-fitted assemblies was achieved through finite element simulations and experiments using the deep hole drilling technique. Shrink-fitted assemblies using stainless steel and cast iron were manufactured and residual stresses measured using a combination of deep hole and centre hole drilling. The results from the finite element simulations demonstrated that modifications to the deep hole drilling method were required to account for plastic relaxation during the measurement process. This was verified through the experimental measurements. The results from both the stainless steel and cast iron assemblies provided a clear demonstration that the final residual stress state was a consequence of the machining and assembly of the components