API 571 Mechanical Fatigue
Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
Mechanical fatigue is caused by:
cyclic stresses occurring over a long period of time
What materials are affected by Mechanical fatigue?
All materials - the number of cycles necessary to cause failure vary per material.
Fatigue will NOT occur in carbon steel if stresses are below what?
What conditions contribute to Mechanical fatigue?
- 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 materials ultimate tensile strength
What material does not have an endurance limit?
Mechanical fatigue can cause cracks that initiate from the surface and often form what?
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.
Home > Flashcards > Print Preview