Two-Criterion Fault Diagram for a Disk-Shaped Crack with Annoral Load
V. I. Smirnov1, S. A. Atroshenko2
1Emperor Alexander I St. Petersburg State Transport University, Saint Petersburg, 198103 Russia
2Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, Saint Petersburg, 199178 Russia
Keywords: disc-shaped crack, critical force, structural criterion, fracture toughness, short cracks
Abstract
The critical load (force) is estimated for a space with a disk-shaped crack, in the case when a concentrated force acts on its edges along the circumference. It is shown that it is impossible to determine the ultimate force with the help of classical fracture criteria, so a structural strength criterion formulated for axisymmetric problems is used. The relationship between fracture toughness and crack size is investigated and a two-criteria fracture diagram is constructed.
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