Fatigue Crack Growth Predictions for Variable-Amplitude and Spectrum Loading

摘要

The paper surveys various aspects related to the prediction of fatigue crack growth under variable-amplitude loading. After a general introduction of practical problems and various research objectives, attention is focused on observations on fatigue crack growth under variable-amplitude loading and prediction models. Several interaction effects are summarized, including crack closure related phenomena, but also other effects. Different categories of prediction models and results of two round-robin programs are discussed. Methods to check prediction models in detail and criteria to be satisfied are indicated. Comments are given on future developments.