Позорная война рф против Украины

Начата 20 февраля 2014 и полномасштабно продолжена 24 февраля 2022 года. С первых же минут рф ведет ее с нарушением законов и правил войны, захватывает атомные станции, уничтожает бомбардировками мирное население и объекты критической инфраструктуры. Правители и армия рф - военные преступники. Все, кто платит им налоги или оказывают какую-либо поддержку - пособники терроризма. Народ Украины вас никогда не простит и ничего не забудет.

2019 №01 (07) DOI of Article
2019 №01 (02)

The Paton Welding Journal 2019 #01
TPWJ, 2019, #1, 2-6 pages
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #1, 2019 (February)
Pages                      2-6

On the problem of contact electric resistance of different-sized surfaces

D.M. Kaleko
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The theory of electric contacts assumes an experimentally-verified inverse proportionality of electric transient resistance to applied load. The paper shows that this condition is not fulfilled at small compression forces of different-sized contacts, which take place, in particular, in excitation of electric arc by contact or breakup of thin conductor. Measurements of electric resistance of near-contact area between thin (0.75 mm diameter) conductor and sheet of steels St37 (steel 10) and 1.4301 (08Kh18N10), brass CuZn37 (L63) and aluminium alloy AlMg3 (AMg3) showed that there is an increase of electric resistance due to elastic deformation of contact surface under the effect of local load at the rise of force to specific limits. Under experimental conditions the boundary force was equal to 2–3 daN, depending on the mechanical characteristics of metal. Beyond these limits a generally accepted functional dependence becomes effective. 12 Ref., 1 Table, 8 Figures.
Keywords: transient electric resistance, electric contacts, elastic deformation, stud welding
Received:                26.08.18
Published:               13.02.19
1. Holm, R. (1961) Electric contacts. Moscow, IL [in Russian].
2. Kochergin, K.A. (1972) Pressure welding. Leningrad, Mashinostroenie [in Russian].
3. Sakhatsky, G.V. (1979) Technology of cold welding. Kiev, Naukova Dumka [in Russian].
4. Karakozov, E.S. (1986) Pressure welding of metals. Moscow, Mashinostroenie [in Russian].
5. Demkin, N.V., Ryzhov, E.V. (1981) Quality of surface and contact of machine parts. Moscow, Mashinostroenie [in Russian].
6. Kragelsky, I.V., Dobychin, N.M., Kombalov, V.S. (1977) Principles of calculation for friction and wear. Moscow, Mashinostroenie [in Russian].
7. Slobodyan, M.S. (2013) Analysis of procedures for evaluation of electric resistance of electrode-electrode and part-part areas before spot resistance microwelding. Svarochnoye Proizvodstvo, 8, 20–24 [in Russian].
8. Leskov, G.I. (1970) Electric welding arc. Moscow, Mashinostroenie [in Russian].
9. Askeland, D.R., Fulay, P.P., Wright, W.J. (2011) The science and engineering of materials. Cengage Learning.
10. Thornton, P.H., Krause, A.R., Davies, R.G. (1996) Contact resistance in spot welding. Welding J., 12, 402–412.
11. Johnson, G.L. (1989) Mechanics of contact interaction. Moscow, Mir [in Russian].
12. Yanke, E., Emde, F., Lyosh, F. (1977) Special functions. Formulas, plots, tables. Moscow, Nauka [in Russian].