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Energy approach to determination of the instantaneous damage level

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Abstract

A kinetic equation similar to the Kachanov-Rabotnov equation is derived from the law of conservation of mass for the case of isotropic damage. The energy balance is used to estimate the initial level of damage (instantaneous damage). The notion of instantaneous damage is akin to the concept of instantaneous deformation, which arises immediately after a load has been applied to a specimen in creep or toughness-elasticity tests. Using instantaneous damage as the initial condition for the standard evolutionary equation of damage like the Kachanov-Rabotnov equation, one can construct a more correct creep rupture diagram of structural materials than those currently available.

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References

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia

    A. V. Kashtanov & Yu. V. Petrov

Authors
  1. A. V. Kashtanov
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  2. Yu. V. Petrov
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Additional information

Original Russian Text © A.V. Kashtanov, Yu.V. Petrov, 2006, published in Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 76, No. 5, pp. 71–75.

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Kashtanov, A.V., Petrov, Y.V. Energy approach to determination of the instantaneous damage level. Tech. Phys. 51, 604–608 (2006). https://doi.org/10.1134/S1063784206050100

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  • DOI: https://doi.org/10.1134/S1063784206050100

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