The main difference between creep and fatigue is the type of loading and the resulting material behavior:
Creep is the slow, permanent deformation of a material under a constant load, especially at high temperatures, over a long period of time. Creep typically affects the entire body of the material and is a time-dependent process, often seen in applications like turbine blades or steam generators.
Fatigue is the progressive damage and eventual failure of a material due to repeated or cyclic loading, even if the applied stresses are below the material's yield strength. Fatigue usually starts with microscopic cracks that grow with each cycle until the material fails, and it is common in components subjected to vibration or movement, such as bridges or aircraft parts.
In summary, creep involves deformation under constant stress, while fatigue involves failure due to repeated stress cycles.
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