Validation of a Code of Practice for notched bar creep rupture testing: procedures and interpretation of data for design

AbstractThe results of a European collaborative project aimed at validating a Code of Practice for notched bar creep rupture testing and interpretation of results are presented. Several laboratories from different European Union member states were selected to undertake a comprehensive test programme using circumferentially double notched bars possessing a range of notch acuity ratios. The effects of notch spacing and specimen size were investigated. Inelastic finite element analysis was conducted for establishing the important stress components and stress ratios that are considered instrumental in determining the multiaxial stress rupture criterion (MSRC) for a given material and loading condition. The results of the work have validated the concepts and procedures recommended in the Code of Practice in terms of carrying out the tests and the simplified procedures for the interpretation of results. New finite element analysis has resulted in revised estimates of the multiaxial skeletal point stress compone...