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Analysis of Vibrodiagnostic Parameters of the Presence of a Breathing Surface Crack of Different Configurations in a Round Bar

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The authors discuss a method of approximate calculation of possible values of vibrodiagnostic parameters of the presence of a breathing crack of different crack front configurations (semielliptical, semi-circular, or straight one) in a round bar under super- and subharmonic resonances in a natural bending mode. The calculation of the vibrodiagnostic parameters due to the presence of a crack has been performed through the example of a cantilever bar in the case of the resonance in the first normal mode under force and kinematic excitations. The vibrodiagnostic parameters have been found as a function of the place of the exciting force application, crack location, relative depth and relative area, for different ellipse semi-axes ratios and for cracks with straight or semi-circular fronts. A comparison is made between the calculated results and the finite-element numerical solution data.

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References

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Authors and Affiliations

  1. Pisarenko Institute of Problems of Strength, National Academy of Sciences of Ukraine, Kiev, Ukraine

    V. V. Matveev & E. A. Onishchenko

Authors
  1. V. V. Matveev
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  2. E. A. Onishchenko
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Translated from Problemy Prochnosti, No. 6, pp. 5 – 20, November – December, 2017.

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Matveev, V.V., Onishchenko, E.A. Analysis of Vibrodiagnostic Parameters of the Presence of a Breathing Surface Crack of Different Configurations in a Round Bar. Strength Mater 49, 739–750 (2017). https://doi.org/10.1007/s11223-018-9919-3

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  • DOI: https://doi.org/10.1007/s11223-018-9919-3

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