Is this the Norris–Landzberg model?
No. This page intentionally uses the simpler Coffin–Manson temperature-range relation and does not include frequency or maximum-temperature terms.
Reliability Toolkit
Coffin–Manson Thermal Cycling Acceleration Calculator
Compare cycle severity using a simplified Coffin–Manson relationship based on temperature excursion and a user-selected fatigue exponent.
How to use it
Inputs that remain auditable.
- 01
Enter use and accelerated ΔT values.
- 02
Enter the justified fatigue exponent m.
- 03
Translate accelerated cycles to equivalent use cycles only within the model's applicability.
Questions
Frequently asked
Can I use the default exponent for every solder joint?
No. The exponent is an input because package, interconnect, material system and failure mode affect the appropriate fatigue relationship.