Fatigue - Random Fatigue (Spectrum Loading) (PFA_FATIGUE_RANDOM)
Determines the fatigue life of composite or metal structures
subject to a sequence of external cyclic excitations with variable amplitude
Capable of detecting a crack at the micro level, i.e., initiation
site, and following its development under the applied cyclic loading.
Rainflow analysis is used to reduce the complex loading to a
series of simple cyclic loadings.
For each stress level, the degree of cumulative damage incurred
is calculated from the S-N curve, and the individual contributions are combined
using Miner's rule.
An efficient multi-factor interaction model (MFIM) can be used to
account for a broad range of factors that affect the fatigue life of a
structure such as temperature and surface finish.
Can be used with GENOA-PA to account for the probabilistic nature
The S-N curves for constituent materials, which are derived from
tests or found in the open literature, are required for the analysis.
Accurately evaluates the service life of composite or metal
structures subject to complicated random cyclic loads.
Predicts the fatigue failure initiation site and its development
in aerospace, automotive and other composite structures.
Accounts for the probabilistic nature of fatigue.