RandomlyVaryingStress

Randomly Varying Stress consists of several fluctuating cycles

Cumulative linear damage from separate fluctuating cycles is calculating using Miner's rule

\[D=\sum \frac{n_i} {N_i} \] where

\(n_i \) - the number of cycles at stress level \(\sigma_i \)

\(N_i \) -the number of cycles that would cause failure at stress level \(\sigma_i \)

When D = 1 failure occurs