THE FORMATION OF DISTRIBUTION OF ELASTO-PLASTIC DEFORMATION IN THE RODS IN THE RESULT OF WAVE PROCESSES


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Abstract

The paper considers the issues of ensuring the uniformity of deformation of elastic shafts and screws under the simultaneous action of the longitudinal loads and heating during thermal-power processing. The uniformity of residual deformations in the longitudinal direction ensures the equalization of the residual technological stresses, and it leads to the minimum buckling in the axial direction due to the stress relaxation. These questions are particularly topical for the lead screws which have strict requirements for the spacing accuracy. The paper presents the results of experimental studies on the influence of main technological modes of thermo-power processing: the degree of deformation, deformation rate and heating temperature on the uniformity of deformation along the length of the shaft, which is expressed by the coefficient of locality, which is defined as the ratio of maximum deformation of one of the sections to the average or minimum deformation of areas. The authors give the comparison of the hardening curves obtained during theoretical modeling of the deformation process and from the results of the full-scale experiment which followed by a conclusion on the unstable, oscillating deformation nature at the stage of plastic flow. Among various theories concerned with the possibility of deformation wave occurrence during parts load, in the elastic task formulation of impact disturbances, the wave theory of elasto-plastic deformations distribution under the static loading was used for explanation of non-uniformity of plastic deformations distribution along the length of the sample. On the basis of Voigt rheological model, phase trajectories for different parameters of the system were obtained, that showed the feasibility of implementation within the system of damped wave processes. Taking it into account, the authors suggested controlling of the process of formation of residual stresses distribution in view of the forming node areas and antinodes of the elasto-plastic deformations.

About the authors

Dmitriy Aleksandrovich Rastorguev

Togliatti State University, Togliatti

Author for correspondence.
Email: Rast_73@mail.ru

PhD (Engineering), assistant professor of Chair “Equipment and technology of engineering manufacture”

Россия

Kirill Olegovich Semenov

Togliatti State University, Togliatti

Email: semen-tgu@yandex.ru

graduate student of Chair “Equipment and technology of engineering manufacture”

Россия

References

  1. Rabotnov Yu.I. Elementy nasledstvennoy mekhaniki tverdykh tel [The elements of hereditary mechanics of solid bodies]. Moscow, Nauka Publ., 1977, 350 p.
  2. Rabotnov Yu.I. Mekhanika deformiruemogo tverdogo tela [Solid mechanics]. Moscow, Nauka Publ., 1979, 744 p.
  3. Pisarenko G.S. Obobshchennaya nelineynaya model’ ucheta rasseyaniya energii pri kolebaniyakh [General nonlinear model of energy dissipation evaluation during oscillations]. Kiev, Naukova dumka Publ., 1985, 236 p.
  4. Pisarenko G.S., Boginich O.E. Kolebaniya kinematicheski vozbuzhdaemykh system s uchetom dissipatsii energii [Fluctuations of kinematically induced systems with the account of energy dissipation]. Kiev, Naukova dumka Publ., 1982, 220 p.
  5. Fridman Ya.B. Mekhanicheskie svoystva metallov. Ch. 1. Deformatsiya i razrushenie [Mechanical properties of metals. P. 1. Deformation and destruction]. Moscow, Mashinostroenie Publ., 1974, 472 p.
  6. Kachanov L.M. Osnovy teorii plastichnosti [Foundations of the theory of plasticity]. Moscow, Nauka Publ., 1969, 420 p.
  7. Kolsky G. Volny napryazheniya v tverdykh telakh [Stress waves in solid bodies]. Moscow, Inostrannaya literatura Publ., 1955, 194 p.
  8. Panin V.E., Likhachev V.A., Grinyaev Yu.V. Strukturnye urovni deformatsii tverdykh tel [Structural levels of solid bodies deformation]. Novosibirsk, Nauka Publ., 1985, 229 p.
  9. Zuev L.B. On the wave character of plastic flow. Macroscopic autowaves of deformation localization. Fizicheskaya mezomekhanika, 2006, vol. 9, no. 3, pp. 47–54.
  10. Zuev L.B., Danilov V.I. Slow autowave processes in the course of deformation of solid. Fizicheskaya mezomekhanika, 2003, vol. 6, no. 1, pp. 75–94.
  11. Panin V.E. Foundations of physical mesomechanics. Fizicheskaya mezomekhanika, 1998, vol. 1, no. 1, pp. 5–22.
  12. Drachev O.I., Voronov D.Yu., Rastorguev D.A. New technology of thermo-power processing of elastic shafts. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta, 2004, no. 1, pp. 32–35.
  13. Drachev O.I., Voronov D.Yu., Rastorguev D.A. Experimental plant for uniform axle plastic deformation of non-hard parts during thermo-power processing. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta, 2004, no. 9, pp. 15–18.
  14. Drachev O.I. Tekhnologiya izgotovleniya malozhestkikh osesimmetrichnykh detaley [Technology of production of non-hard axisymmetric parts]. S. Petersburg, Politekhnika Publ., 2005, 289 p.
  15. Drachev O.I., Argetkin A.V., Drachev A.O., Yashkina T.L. Sposob i ustroystvo dlya termosilovoy obrabotki osesimmetrichnykh dlinnomernykh detaley [Method and device for thermo-power processing of axisymmetric long parts]. Patent RF no. 2235794, 2004.
  16. Drachev O.I. Upravlenie tekhnologicheskoy nasledstvennostyu detaley maloy zhestkosti [Control of technological heredity of fragility parts]. Irbit, ONIKS Publ., 2011, 192 p.
  17. Drachev O.I. Povyshenie tochnosti i stabilnosti form nezhestkikh osesimmetrichnykh detaley metodom termosilovoy obrabotki [The improvement of accuracy and stability of forms of non-hard axisymmetric parts using the method of thermo-power processing]. Stary Oskol, TNT Publ., 2011, 267 p.
  18. Repin K.A., Drachev O.I., Voronov D.Yu. New technologies of processing of fragile long parts and description of the device for their implementation. Materialy XII Vseros. nauchno-tekhn. konf. “Mekhaniki XXI veku”. Bratsk, Bratskiy gos. universitet Publ., 2013, pp. 135–139.
  19. Drachev O.I., Rastorguev D.A., Starostina M.V. Modeling of the elastic-plastic deformations at thermal force processing. Vektor nauki Tolyattinskogo gosudarstvennogo universiteta, 2012, no. 3, pp. 80–85.
  20. Drachev O.I., Rastorguev D.A., Starostina M.V. Increase of efficiency of processing of low-rigid shaft at the combined thermopower loading. Metalloobrabotka, 2012, no. 3, pp. 30–35.

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