Factor Of Safety Formula Yield Strength. A constant required value, imposed by law, standard. Factor of safety depends entirely upon the nature of the loading.
But when the ratio is equal to. The yield calculation will determine the safety factor until the part starts to plastically deform. Also, the comparison between the compressive strength of cube and compressive strength of cylinder, a factor of 0.8 to the cube strength is often applied for normal strength concrete.
In some cases a higher value of 90% yield may be used instead of the ⅔ value.
When the strength of the material or the amount of the load or both are uncertain the factor of safety should be increased by an allowance sufficient to cover the amount of the uncertainty. In colloquial use the term, “required safety factor” is functionally equivalent to the design factor. The factor of safety can be calculated in different ways. The ultimate strength is the maximum stress that a material can withstand.