Dr. Daniewicz holds degrees in both Welding Engineering and Mechanical Engineering from Ohio State University. He recently received their highly prestigious Keith Miller Young Investigator Award. He has authored or co-authored 17 refereed technical publications regarding fracture mechanics and fatigue. Research Activities Introduction of Beneficial Residual Stresses.
Machine elements operating under time dependent loads are often susceptible to fatigue failure.
It has long been recognized that the introduction of carefully controlled compressive residual stress fields is one potential means of increasing resistance to fatigue. Water peening is similar to shot peening, using instead of steel shot a high velocity water jet to impinge upon the component surface. The impinging water jet generates a surface pressure distribution, generating a thin layer of localized plastic deformation. This deformation is resisted by the elastic core, and surface compressive residual stresses are subsequently produced. As a replacement for shot peening, potential advantages of water peening include a better surface finish, increased coverage capabilities, and simpler process control.