What is the significance of endurance limit fatigue limit Wh

What is the significance of endurance limit (fatigue limit)? What are the factors that can affect the fatigue life?

Solution

Endurance limit means that maximum amount of stress that a material can sustain for specified number of cycles without the failure of the material. The significance of fatigue limit is that if material is loaded below the stress limit it will never fail regardless the no. of times it has been loaded.

Factors that may affect the fatigue life of an engineering material include:

1. Material Defects

2.Surface roughness and surface treatments

3.Size

4. Type of loading

5. Harsh environment or Damaging in services

6. Poor maintenanceand improper repair.

7. Imperfections in assembly.