Working Stress and Factor of Safety:
nA motor vehicle component must not be stressed beyond the allowable safe working stress and that must be below the elastic limit of the material.
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nThe choice of a suitable factor of safety depends very much upon the physical properties of the material employed and upon the nature of the loading. nWhen deciding what factor of safety to use, factors such as corrosion, expected life of the component, possibility of mishandling, etc.