Stress Raisers in Fatigue

CIM Bulletin, 1951


THE deleterious effect of stress raisers or notches on the resistance to fatigue of machine components, and other parts subjected to repeated dynamic loading, has been well known for many years. Most engineers in the mechanical field have, at one time or another, encountered a shaft which fractured due to a poor transition fillet, a holding- down bolt which failed due to insufficient tightening or inferior thread form, or a fitted member which broke through a combination of fretting corrosion and clamping stresses. All of these are examples of the damaging influence exerted by stress raisers in fatigue.
Keywords: cold working, fatigue limit, fatigue strength, strength reduction, stress concentration, Fatigue, Process, Processes, Shafts, steel, Steels, Strength, stress, Treatment