Factor of safety (FOF)
Factor of safety:-
Factor of safety is used to determine.
- Permissible Stress
- Allowable Stress
- Safe Stress
- Working Stress
Failure Strength:-
For Static Load ;
Yield Strength is the failure criteria for the Ductile MaterialUltimate Strength is the failure criteria for Brittle Material also Ductile Material
For Static Load;
Endurance Limit is the failure criteria.Brittle:-
Material will not permits any deformation and goes to fractures ultimate strength will be the failure strength.
Ductile:-
- Case-1: When a material does not undergo permanent deformation or is under the elastic limit, yield strength will be the failure strength.
- Case-1I: When Material undergo permanent deformation, ultimate strength will be the failure strength.
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