| Popis: |
If a structural material behaves in a linear elastic manner, it is generally assumed that plane-strain fracture toughness (K I c ) may be used with applicable solutions to predict conditions for catastrophic fracture. There have been a few instances where the adequacy of this approach has been verified, but these evaluations were conducted for specific applications. This paper evaluates an approach using specimens containing surface cracks, with substantial variations in crack size and shape, and loaded by either tension or bending. Test results are used to compare the critical stress-intensity factor (K c r i t ) with K I c . Moire interferometry is used to obtain K 1 at the free surface for comparison with the calculated result. |
