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Attachment to repeated impact tester for bending impact tests and method of obtaining asymmetric cycles

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Strength of Materials Aims and scope

Conclusions

  1. 1.

    Utilization of the known principle of prestressing specimens made it possible to design an attachment to a repeated impact tester to provide for asymmetric test cycles with a wide range of change in the coefficient of cycle asymmetry.

  2. 2.

    A method was worked out for obtaining an asymmetric cycle in repeated impacts with small energy. Graphs were plotted which make it possible to obtain a cycle with specified coefficient of asymmetry or to determine its magnitude if the height of drop of the ram is given, in dependence on the shape and dimensions of the specimens.

  3. 3.

    Some experimental data were presented illustrating the effect of the coefficient of cycle asymmetry in dependence on the shape of the specimens, their rigidity, prestresses and impact stresses on the endurance of the specimens and the development of fatigue fracture.

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Literature cited

  1. A. I. Lampsi, Description of an Impact Fatigue Testing Machine [in Russian], Tula Mechanical Institute, Tula (1948).

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  4. A. I. Oding, Permissible Stresses in Engineering, and Fatigue Strength of Metals [in Russian], Mashgiz, Moscow (1962).

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  5. L. N. Molchanov, “Investigation of fractures and energy expenditures for fracturing specimens of alloy steels in static, impact, and repeated impact bending,” Probl. Prochn., No. 6, 26–30 (1976).

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  6. L. N. Molchanov, Effect of the Gauge Length of the Specimen on the Endurance of Alloy Steels in Impact and Repeated Impact Bending with Low Impact Energy [in Russian], Moscow (1974), Manuscript Deposited, No. 1431-74 Dep.

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Authors and Affiliations

  1. Tula Polytechnic Institute, Tula

    L. N. Molchanov, K. V. Klimov & P. A. Baryshnikov

Authors
  1. L. N. Molchanov
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  2. K. V. Klimov
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  3. P. A. Baryshnikov
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Additional information

Translated from Problemy Prochnosti, No. 2, pp. 89–93, February, 1979.

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Molchanov, L.N., Klimov, K.V. & Baryshnikov, P.A. Attachment to repeated impact tester for bending impact tests and method of obtaining asymmetric cycles. Strength Mater 11, 216–221 (1979). https://doi.org/10.1007/BF00768239

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  • DOI: https://doi.org/10.1007/BF00768239

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