Basquin Fatigue Life Calculator
Basquin elastic stress AMPLITUDE σa=σf′(2N)^b with negative calibrated b and explicit reversals. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
Basquin's relation models fatigue life through a calibrated stress-power law.
Basquin's relation models fatigue life through a calibrated stress-power law.1
The coefficient and negative exponent require an independently applicable material and loading basis. Use this tool to calculate basquin Fatigue Life from the supplied measurements and assumptions.
When to use Basquin Fatigue Life Calculator
Use this tool to calculate basquin Fatigue Life from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
How to use Basquin Fatigue Life Calculator and understand its results
- Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
- Enter stressAmplitudePa, callerFatigueStrengthCoefficientPa, callerBasquinExponent, using the field meanings and rules below, then run the tool.
- Read basquinCycles. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| stressAmplitudePa | Stress amplitude pa | number | Required |
| callerFatigueStrengthCoefficientPa | Caller fatigue strength coefficient pa | number | Required |
| callerBasquinExponent | Caller basquin exponent | number | Required |
Enter positive stress amplitude and fatigue-strength coefficient in Pa and a finite strictly negative Basquin exponent. Return half of (amplitude/coefficient)^(1/exponent) as cycles; nonfinite output fails. The half factor converts the modeled reversal count to cycles. No mean-stress correction, variable-amplitude damage or coefficient fitting is supplied.
cycles=0.5×(stressAmplitudePa/fatigueStrengthCoefficientPa)^(1/BasquinExponent) Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| basquinCycles | Basquin Cycles; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"stressAmplitudePa": 50,
"callerFatigueStrengthCoefficientPa": 100,
"callerBasquinExponent": -0.5
},
"output": {
"basquinCycles": 2
}
}Limitations and assumptions
The coefficient and negative exponent require an independently applicable material and loading basis. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Pavement Fatigue Crack Model Calculator for this related task: Miner-style damage accumulates cycle-count fractions relative to failure counts.
Use Weibull Modulus Calculator when its separate inputs and assumptions fit the question: A Weibull probability plot relates transformed cumulative probabilities to logarithmic strength.
References
-
Basquin Fatigue Life Calculator — tool.io
Similar or alternative tools
- Pavement Fatigue Crack Model Calculator
Miner-style damage accumulates cycle-count fractions relative to failure counts.
- Weibull Modulus Calculator
A Weibull probability plot relates transformed cumulative probabilities to logarithmic strength.