EngiRef / Formulas
Basquin Equation (Fatigue)
High-cycle fatigue life prediction
Fatigue
Source Details
Id
mat-fatigue-basquin
Name
Basquin Equation (Fatigue)
Discipline
materials
Category
Fatigue
Latex
\sigma_a = \sigma_f^\prime (2N_f)^b
Description
High-cycle fatigue life prediction
Conditions
Empirical stress-life relation; 2Nf is reversals to failure
Variables
[
{
"symbol": "σₐ",
"name": "Stress Amplitude",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
},
{
"symbol": "σ'f",
"name": "Fatigue Strength Coefficient",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
},
{
"symbol": "Nf",
"name": "Cycles to Failure",
"unit": "",
"siUnit": ""
},
{
"symbol": "b",
"name": "Fatigue Strength Exponent",
"unit": "",
"siUnit": ""
}
]Solve For
σₐ, Nf
Tags
fatigue, basquin, cycles, life
Is Custom
false