Abstract
Experimental and theoretical data for strains arising in a single-wire copper conductor experiencing a current load are reported. The conductor has been examined under a JSM-6390L scanning electron microscope. A mathematical model for the stress–strain state of a stretched copper rod at 700°C has been developed on the basis of the nonlinear problem of construction mechanics. Mechanical forces that lead to necking in a single-wire copper conductor through which extra current passes have been determined. The mathematical model has been reduced to simple analytical relationships, which can be applied in forensic fire investigation.
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REFERENCES
A. Yu. Mokryak, I. D. Cheshko, and V. V. Pen’kov, Probl. Uprav. Riskami Tekhnosfere, No. 4 (32), 41 (2014).
I. D. Cheshko, A. Yu. Mokryak, and S. V. Skodtaev, Vestn. St. Petersburg. Univ. Gos. Protivopozh. Sluzhby MChS Rossii, No. 1, 41 (2015).
A. I. Nedobitkov, Pozharovzryvobezopasnost 28 (4), 42 (2019). https://doi.org/10.18322/PVB.2019.28.04.42-50
V. I. Spitsyn and O. A. Troitskii, Electroplastic Deformation of Metals (Nauka, Moscow, 1985) [in Russian].
V. E. Egorushkin, V. E. Panin, and A. V. Panin, Phys. Mesomech. 21, 390 (2018). https://doi.org/10.1134/S1029959918050028
P. A. Lukash, Fundamentals of Nonlinear Structural Mechanics (Stroiizdat, Moscow, 1978) [in Russian].
A. P. Filin, The Applied Mechanics of a Solid Deformable Body, Vol. 1: Resistance of Materials with Elements of Continuum Theory and Structural Mechanics (Nauka, Moscow, 1975) [in Russian].
V. A. Birger and R. R. Mavlyutov, Strength of Materials (Nauka, Moscow, 1986) [in Russian].
S. P. Timoshenko and J. M. Gere, Mechanics of Materials (Van Nostrand Reinhold, New York, 1972).
Ya. G. Panovko and I. N. Gubanova, Stability and Oscillation of Elastic Systems: Modern Concepts, Paradoxes and Errors (Nat. Aeronaut. Space Admin., Washington, 1973).
V. I. Fedos’ev, Strength of Materials (Nauka, Moscow, 1974) [in Russian].
S. V. Serensen, V. P. Kogaev, and R. M. Shneiderovich, Load-Bearing Capacity and Calculation of Machine Parts for Strength (Mashinostroenie, Moscow, 1975) [in Russian].
I. A. Birger, B. F. Shorr, and G. B. Iosilevich, Computation of Machine-Component Strength: Handbook (Mashinostroenie, Moscow, 1979) [in Russian].
N. M. Belyayev, Strength of Materials (Mir, Moscow, 1979). https://archive.org/details/BelyaevStrengthOfMaterialsMir1979/page/n15/mode/2up
A. K. Nikolaev and S. A. Kostin, Copper and High-Temperature Alloys (DPK-Press, Moscow, 2012) [in Russian].
V. I. Sakalo, Yu. S. Guseva, and T. V. Inshakova, Vestn. Bryansk. Gos. Tekh. Univ., No. 3(47), 94 (2015).
W. Nowacki, Teoria Sprężystości (Państwowe Wydawnictwo Naukowe, Warszawa, 1970).
L. M. Kachanov, Fundamentals of the Theory of Plasticity (Dover, New York, 2014).
I. N. Bronshtein and K. A. Semendyayev, A Guide-Book to Mathematics for Technologists and Engineers (Pegamon, Oxford, 1964).
V. Babrauskas, J. Fire Sci. 36, 438 (2018).
V. Babrauskas, Rev. Fire Saf. J. 89, 7 (2017).
V. Babrauskas, “Electrical Fires,” in SFPE Handbook of Fire Protection Engineering, 5th ed. (Springer, New York, 2016), p. 662.
ACKNOWLEDGMENTS
Microscopic studies were carried out in the Veritas center at Serikbaev East Kazakhstan Technical University.
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Translated by V. Isaakyan
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Nedobitkov, A.I., Abdeyev, B.M. Inelastic Stretching of a Single-Wire Copper Conductor under Unlimited Local Strains at Positive Temperature. Tech. Phys. 66, 902–908 (2021). https://doi.org/10.1134/S1063784221060128
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DOI: https://doi.org/10.1134/S1063784221060128