ESIS TC 8 - Numerical Round Robin on Micro-Mechanical Models - Results of Phase II/Task B2 on Cleavage Toughness Prediction on CT Specimen

摘要

This paper gives the results obtained for the phase Ⅱ, Task B2 Round Robin organised by the CEA Saclay within the ESIS (European Structural Integrity Society), Technical Committee 8 on Numerical Methods. It is part of a larger project initiated in 1993 and organised in 3 phases. Phase Ⅰ was focussed on the determination of local approach parameters for ductile tearing (Task A) and for cleavage (Task B) for a German pressure vessel steel. The objective of PhaseⅡwas to perform finite element simulation of crack growth CT for ductile tearing (Task A) and for cleavage (Task B). For this latter Task, the objective was to compute the toughness and the failure probability of a CT specimen on the lower shelf at ― 154°C for the 22 NiMoCr 3 7 German RPV steel. Eleven laboratories have contributed to this Round Robin and six different FE codes have been used.