Crack growth in pin-loaded tubes - Part 1: numerical analysis

This paper contains a numerical analysis of a cracked pin-loaded tube. The relationship between the various methods of calculating 'total' or 'equival ent' strew intensity factors is discussed and the reliability of using J co ntour integral results is shown. Trends in the stress intensity factors K-I , K-II, K-III and K-e are found and the changes in these factors for change s in the profile and length of the crack are explained. A set of 'best-case ' curves reflecting the profile of the crack in the experimental work and t he method of selecting these cases is shown; these will be used for compari son with experimental data in a companion paper, Part 2, which follows.