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Steady-State Creep of a Composite Rod in Tension in the Presence of an Aggressive Environment

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Mechanics of Composite Materials Aims and scope

The stress-strain state of a composite tensile rod in creep under conditions of an aggressive environment is investigated. The creep of each part of the rod is described by a power-type model with different parameters. The effect of the aggressive environment is determined by the diffusive penetration of its elements into the material of the rod. To solve the diffusion equation, an approximate method based on introduction of the diffusion front is used. The distribution of stresses in time is analyzed provided the aggressive environment penetrates into different parts of the rod with different diffusion coefficients. Conditions at which the values of stresses in parts of the rod come closer or diverge in time, are obtained. The characteristic parameters of the diffusion and creep processes are determined. The graphs of time-dependent stresses are constructed for different parts of the rod with account of the conditions found.

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References

  1. Yu. N. Rabotnov, Creep of Elements of Structures [in Russian], Nauka, Moscow (1966).

  2. A. M. Lokoschenko, Creep and Creep Rupture of Metals in Aggressive Environments. [in Russian], Moscow State University Publ., Moscow (2000).

  3. A. M. Lokoschenko, Creep and Creep Rupture of Metals [in Russian], Fizmatlit, Moscow (2016).

  4. A. M. Lokoschenko and L. V. Fomin, “Modeling the creep rupture of tensile rods in an aggresive medium with account of a variable diffusion coefficient,” Mech. Compos. Mater., 50, No. 6, 1033-1042 (2014).

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  5. L. V. Fomin, “Description of the long-term strength of tensile rods of rectangular and circular cross sections in a hightemperature air medium,” Vest. Samar Gos Tekhn. Univ., Phys. and Mathem. Sci., 32, No. 3 (2013).

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Acknowledgements

The author expresses gratitude to Professor A. M. Lokoshchenko for the problem statement and valuable consultations. This work was carried out with the support of the Russian Fund of Fundamental Research (grant No. 14-08-00528a).

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Authors and Affiliations

  1. Scientific Research Institute of Mechanics, M. V. Lomonosov Moscow State University, Moscow, Russia

    L. Fomin

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  1. L. Fomin
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Correspondence to L. Fomin.

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Translated from Mekhanika Kompozitnykh Materialov, Vol. 52, No. 6, pp. 1055-1068, November-December, 2016.

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Fomin, L. Steady-State Creep of a Composite Rod in Tension in the Presence of an Aggressive Environment. Mech Compos Mater 52, 741–750 (2017). https://doi.org/10.1007/s11029-017-9624-5

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  • DOI: https://doi.org/10.1007/s11029-017-9624-5

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