| Popis: |
Current defect assessment procedures are largely based on the concepts used to describe cleavage fracture in ferritic steels and void coalescence, or tearing, where linear elastic fracture mechanics is applicable. These procedures, with the use of toughness values which describe the point of initiation of tearing, provide extremely conservative predictions of critical flaw sizes when compared with service experience with materials of high tearing resistance. This paper attempts to show that under specified conditions it is possible to use the geometry dependent toughness value derived from the maximum load deflection in laboratory bend tests to provide a more realistic but safe flaw size evaluation. |
