Before revision: The Goodman relation can be represented mathematically as: Where is the alternating stress, is the mean stress, is the fatigue limit for completely reversed loading, and is the ultimate tensile strength of the material.
After revision: The Goodman relation can be represented mathematically as: Where is the equivalent fatigue limit for combined alternating and mean stress, is the mean stress, is the fatigue limit for completely reversed loading, and is the ultimate tensile strength of the material.