A generalized theory of the thermokinetics of the process of thermal destruction of polymer materials has been developed in the context of the kinetic thermofluctuating concept based on unification of a number of independent approaches, namely, structurally kinetic (for describing elementary acts of the destruction process), mechanical (for describing the local stress at the crack tip), thermodynamic (for calculating the value of safe stress). The developed model concepts are based on experimental data relating to accumulation of disturbances in loaded samples; on force disturbances and ruptures of bonds in the vicinity of the crack tip; on submicroscopic cracks and their characteristics; fractographic investigations of the rupture face; and on the kinetic of growth of a main crack. A generalized formula of the rate of crack growth is given, the tensor of stresses at the crack tip in the conditions of mechanical and thermal loadings is calculated, the main parameters and limiting characteristics on mechanical and thermal loading of a polymer sample are calculated, a theoretical relation of the time dependence of strength in the case of a purely thermal loading in the full interval of thermal loadings from a safe to a critical one and at the stage of athermal growth of the crack has been suggested. Numerical experiments are presented.
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References
É. M. Kartashov, B. Tsoi, and V. A. Shevelev, Destruction of Films and Fibers. Structural-Statistical Aspects [in Russian], URSS, Moscow (2015).
B. S. Petukhov and L. G. Genin, Heat Transfer in Nuclear Power Engineering Installations [in Russian], Atomizdat, Moscow (1974).
V. M. Marchenko, Temperature Fields and Stresses in Constructions of Flying Vehicles [in Russian], Mashinostroenie, Moscow (1962).
O. M. Belotserkovskii (Ed.), Problems of the Mechanics and Heat Transfer in Space Technology [in Russian], Mashinostroenie, Moscow (1982).
B. M. Galitseiskii, V. D. Sovershennyi, and V. F. Formalev, Thermal Protection of Turbine Blades [in Russian], Izd. MAI, Moscow (1996).
K. S. Demirchan and P. A. Buryrin, Modeling and Machine Calculation of Electric [in Russian], Vysshaya Shkola, Moscow (1988).
A. A. Askadskii, Structure and Properties of Polymers [in Russian], Khimiya, Moscow (1981).
Yu. K. Godovskii, Thermophysics of Polymers [in Russian], Khimiya, Moscow (1982).
Yu. V. Polezhaev and F. B. Yurevich, Heat Shielding [in Russian], Énergiya, Moscow (1976).
S. Madorskii, Thermal Decomposition of Organic Polymers [in Russian], Mir, Moscow (1967).
O. F. Shlenskii, N. V. Afanas’ev, and A. G. Shashkov, Thermal Destruction of Materials [in Russian], Énergoatomizdat, Moscow (1996).
V. V. Panasyuk, A. V. Andreikiv, and V. Z. Parton, Principles of the Mechanics of Destruction of Materials. Mechanics of Destruction [in Russian], Naukova Dumka, Kiev (1988).
M. P. Savruk, Coefficients of the Intensity of Stresses in Bodies with Cracks. Mechanics of Destruction [in Russian], Vol. 2, Naukova Dumka, Kiev (1988).
V. M. Finkel’, Physical Principles of Destruction Retardation [in Russian], Metallurgiya, Moscow (1977).
É. M. Kartashov and V. Z. Parton, Dynamical thermoelasticity in the problem of the thermal shock (Review), in: The Outcomes of Science and Technology Series: Mechanics of the Deformed Solid Body, VINITI, Moscow (1991), Vol. 22, pp. 55−127.
É. M. Kartashov, Problem of thermal shock in the region with a moving boundary on the basis of new integral relations, Izv. Ross. Akad. Nauk, Énerget., No. 4, 122−137 (1997).
É. M. Kartashov, Modern representation of the kinetic thermofluctuational theory of strength of polymers (Review), Itogi Nauki Tekh. Ser.: Khim. Tekhol. VMS, VINITI, Moscow (1991), Vol. 27, pp. 3−122.
V. R. Regel’, A. I. Slutsker, and É. E. Tomashevskii, Kinetic Theory of the Strength of Solid Bodies [in Russian], Nauka, Moscow (1974).
Ya. I. Frenkel′, Kinetic Theory of Liquids [in Russian], Izd. AN SSSR, Leningrad (1945).
G. M. Bartenev, Strength and Mechanisms of Destruction of Polymers [in Russian], Khimiya, Moscow (1984).
A. I. Gubanov and A. D. Chevychelov, Toward the theory of tensile strength of solid polymers, Fiz. Tverd. Tela, 4, No. 4, 928−933 (1962).
F. Kerkhoff, Bruchvorgänge in Gläsern, Verlag der Deutschen Glastechn. Gesellschaft, Frankfurt (1970).
E. A. Kuz’min and V. P. Pukh, Some Problems of the Solid Body Strength [in Russian], Izd. AN SSSR, Moscow–Leningrad (1959).
G. M. Bartenev, I. V. Razumovskaya, and P. A. Rebinder, Toward the theory of spontaneous dispersion of solid bodies, Kolloid. Zh., 20, No. 5, 654−664 (1958).
N. A. Zlatin, S. M. Mochalov, G. S. Pugachev, and G. S. Bragov, Time laws governing the destruction of metals on intense loadings, Fiz. Tverd. Tela, 16, No. 6, 1752−1755 (1974).
G. R. Irvin, Analysis of stresses and strains near the end of a crack traversing a plate, J. Appl. Mech., 24, No. 3, 361−364 (1957).
É. M. Kartashov and V. A. Kudinov, Analytical Theory of Thermal conductivity and of Applied Thermoelasticity [in Russian], URSS, Moscow (2012).
É. M. Kartashov, The Griffith energy problem for brittle polymers, J. Eng. Phys. Thermophys., 80, No. 1, 166−175 (2007).
V. V. Shevelev and É. M. Kartashov, On the threshold stress of polymers in a brittle stress, Dokl. Ross. Akad. Nauk, 338, No. 6, 748−751 (1994).
V. V. Shevelev, Brittle-fracture criterion and durability of materials under thermomechanical action, J. Eng. Phys. Thermophys., 81, No. 2, 420−427 (2008).
V. V. Shevelev, Fracture criterion and durability of brittle materials under conditions of stationary heat and mass transfer, J. Eng. Phys. Thermophys., 83, No. 1, 52–59 (2010).
É. M. Kartashov, Analytical Methods in the Theory of the Thermal Conductivity of Solid Bodies [in Russian], Vysshaya Shkola, Moscow (2001).
É. M. Kartashov, Originals of operational images for generalized problems of nonstationary thermal conductivity, Tonk. Khim. Tekhol., 14, No. 4, 77−86 (2019).
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 93, No. 6, pp. 1529–1542, November–December, 2020.
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Kartashov, É.M. Theoretical Representations of the Thermokinetics of Thermal Destruction of Polymers. J Eng Phys Thermophy 93, 1476–1488 (2020). https://doi.org/10.1007/s10891-020-02253-x
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DOI: https://doi.org/10.1007/s10891-020-02253-x