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The paper considers the results of determining the vibrodiagnostic indicators of the presence of various mode I breathing transverse cracks in rod elements of rectangular and circular cross section with different boundary conditions under longitudinal vibrations. Relative second harmonic amplitudes in the vibration spectrum at the main and superharmonic resonance of the first eigenmode of cantilever...
The reliability of one of the simplest methods for calculating vibration parameters in the region of subharmonic resonance for an elastic body with a breathing crack, which is modeled by a single-degree-of-freedom system with a bilinear asymmetric characteristic of the restoring force is assessed. The method is based on the proposition that in a nonlinear system the subharmonic vibrations exist alongside...
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