EngiRef / Formulas
Goodman Diagram (Fatigue)
Modified Goodman line for fatigue design
Fatigue
Source Details
Id
mat-goodman
Name
Goodman Diagram (Fatigue)
Discipline
materials
Category
Fatigue
Latex
\frac{\sigma_a}{S_e} + \frac{\sigma_m}{S_{ut}} = 1
Description
Modified Goodman line for fatigue design
Conditions
Conservative for most ductile metals
Variables
[
{
"symbol": "σₐ",
"name": "Stress Amplitude",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
},
{
"symbol": "σₘ",
"name": "Mean Stress",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
},
{
"symbol": "Sₑ",
"name": "Endurance Limit",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
},
{
"symbol": "Sᵤₜ",
"name": "Ultimate Tensile Strength",
"unit": "Pa",
"siUnit": "Pa",
"imperialUnit": "psi"
}
]Solve For
σₐ, σₘ
Tags
goodman, fatigue, mean, stress, endurance
Is Custom
false