Engineering components are often subjected to cyclic load and the cyclic plastic deformation of engineering materials thus becomes inevitable.
Under asymmetrical cyclic stressing, cyclic accumulation of plastic deformation, denoted as ratcheting, takes place.
ratcheting is very important and should be addressed in the safety assessment and fatigue life estimation of the materials and structure components. Design criteria for nuclear power plants, such as ASME Code Section III, KTA and RCC-MR, all require ratcheting analysis. |