All engineering components and structures contain geometrical discontinuities – threaded connections, windows in aircraft fuselages, keyways in shaft, teeth of gear wheels, etc. The size and shape of these features are important since they determine the strength of the artifact. Conventionally, the strength of components or structures containing defects is assessed by evaluating the stress concentration caused by the discontinuity features. However, such a conventional approach would give erroneous answers if the geometrical discontinuity features have very sharp radii.
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