Cyclic stresses occurring over a long period of time
Which of the following materials are affected by Mechanical Fatigue?
D) All materials
Fatigue will not occur in carbon steel if stresses are below the:
Which condition contributes to Mechanical Fatigue.
A) Temperature:Low temps/High temps/ Not a factor.
B)Steel properties:Dirty steels/Clean steel/Not a factor
C)Grain structure:Fine-grain/Coarse-grain/Not a factor
D)Surface Condition:Notches/Smooth surface/Not a factor
E)Process ph:High ph/Low ph/Not a factor
Temperature: not a factor
Steel properties: Dirty steel
Grain structure: Coarse-grain
Surface condition: Notches
Process ph: Not a factor
The endurance limit is usually about:
40-50 % of a material's ultimate tensile strength
Which material does not have an endurance limit
Mechanical Fatigue can cause cracks that initiate from the surface and often form a :
clam shell appearance
The best defense against Mechanical Fatigue is a:
Good design that minimizes stress concentrations
Inspecting for high-cycle Fatigue can be difficult since:
once the crack begins, only a few cycles are needed for the crack to lead to failure