Fatigue and Creep crack growth
Machine structures and parts are typically subjected to dynamic loads, i.e. various forms of loads with variable magnitudes, thus insight into the behaviour of strucures in such conditions is of great importance.
In the case of structural parts for which safety is of crucial importance, it is necessary to approach the calculation in a way that ensures this safety in the case when the structure is in a damaged state. Thus, in the case of fatigue calculations, it is assumed that an initial crack is present and that fatigue and fracture of that structure are caused by it.
In the case the load is static at elevated temperatures, damage occurs as creep. Accumulation of creep damage can lead to premature failure of a component or machine part...