Exploration of Questions Regarding Modelling of Crack Growth Behaviour under Practical Combinations of Aircraft Spectra, Stress Levels and Materials

摘要

Questions regarding the most appropriate crack growth modeling tools in aircraft structural analysis have been asked of the Fatigue Methods and Standards Group within AVD Continuing the Group's previous endeavours along these lines this report commences by stating the questions that will be explored and then individually examining the issues using both experimental data from coupon tests run under typical aircraft spectra and results from various crack growth prediction models. The findings, particularly those regarding the likely boundaries of applicability of different crack growth modelling techniques are then discussed. Conclusion are drawn regarding the implications of the findings of the work for fatigue practicioners within DSTO and for future work within the Standards and Methods Group.