Why is activation energy important?
Activation energy controls the sensitivity of the assumed degradation mechanism to temperature, so an unjustified Ea can materially change the acceleration factor.
Reliability Toolkit
Arrhenius Acceleration Factor Calculator
Estimate thermal acceleration for a temperature-activated degradation mechanism using an activation energy expressed in electron-volts.
How to use it
Inputs that remain auditable.
- 01
Enter Ea in eV.
- 02
Enter use and accelerated temperatures in °C.
- 03
Optionally use the equivalent-time output to translate accelerated hours to use-condition hours.
Questions
Frequently asked
Can Arrhenius be used for thermal cycling?
Not by itself. Thermal-cycling fatigue is normally represented with a cycle-based fatigue model rather than a simple constant-temperature Arrhenius relation.