Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Yu. V. Vasilevich"'
Autor:
Yu. V. Vasilevich, O. M. Ostrikov
Publikováno v:
Наука и техника, Vol 17, Iss 6, Pp 515-520 (2018)
The equilibrium condition for a non-thin helical wedge-shaped twin located far from the surface of the crystal is obtained. The case of an undeformed solid is considered. It is established that under such conditions a helical twin can not twin can no
Externí odkaz:
https://doaj.org/article/669dbc83c1c1442d8967eba144d99e55
Autor:
Yu. V. Vasilevich, O. M. Ostrikov
Publikováno v:
Наука и техника, Vol 16, Iss 4, Pp 335-342 (2017)
An equilibrium condition of residual edge wedge-type nanotwin in a deformed solid body has been derived in the paper. The condition conclusion is based on the necessity to ensure an equilibrium of force balance acting on every twinning dislocation fr
Externí odkaz:
https://doaj.org/article/7542035d5e81445cbbd17fd7843846a9
Autor:
Yu. V. Vasilevich, S. S. Dounar
Publikováno v:
Наука и техника, Vol 16, Iss 3, Pp 196-205 (2017)
Dynamics of huge renovated lathe is simulated. Turning scheme concerns to heavy rotor shaft finishing. Lofty parts and milling head may create dynamic problems. Static, modal and harmonic frequency response function simulations were provided. Bearing
Externí odkaz:
https://doaj.org/article/9cbe33d394a14e26a7a957fffad3e487
Publikováno v:
Наука и техника, Vol 15, Iss 3, Pp 233-241 (2016)
Virtual testing of portal machine tool has been carried out with the help of finite elements method (FEM). Static, modal and harmonic analyses have been made for a heavy planer. The paper reveals influence of concrete filler on machine tool dynamic f
Externí odkaz:
https://doaj.org/article/c4ab85bbf4c6465e9e88f8a10bd18bbc
Autor:
A. E. Moyseychik, Yu. V. Vasilevich
Publikováno v:
Наука и техника, Vol 0, Iss 5, Pp 33-38 (2015)
The purpose of this paper is to determine dependence between heat generation and resistance to deformation of structural steel.It has been assumed on the basis of the represented data that in the course of deformation of structural steel physicochemi
Externí odkaz:
https://doaj.org/article/92e4f8be204449c1921f081d3aaad46e
Autor:
Yu. V. Vasilevich, S. S. Dovnar
Publikováno v:
Наука и техника, Vol 0, Iss 5, Pp 10-17 (2015)
A finite elements method (FEM)-analysis has been carried out with the purpose to study dynamics of carrying system in a machine tool of unique height. This is a one-off machine with high traveling column and a support with horizontal slide can move v
Externí odkaz:
https://doaj.org/article/e737b5d49a1e48a0bcdf1873ec5fd6c0
Publikováno v:
Наука и техника, Vol 0, Iss 3, Pp 9-19 (2015)
FEM-analysis of dynamics in the bearing system of a heavy-duty machine tool has been carried out in the paper. This is a prospective variant for a large-size multi-purpose machine tool with a horizontal sliding ram. A saddle and a ram are moving vert
Externí odkaz:
https://doaj.org/article/72b70181a8364ef3beb52d7282837225
Publikováno v:
Наука и техника, Vol 0, Iss 4, Pp 14-24 (2014)
The aim of the paper is to reveal and analyze resonance modes of a large-scale milling-drilling-boring machine. The machine has a movable column with vertical slot occupied by a symmetrical carriage with horizontal ram. Static rigidity of the machine
Externí odkaz:
https://doaj.org/article/0b0d37a9828f491391f366f93ab981fd
Publikováno v:
Наука и техника, Vol 0, Iss 3, Pp 25-28 (2007)
The dependences between displacement of threads of different reinforcing material families and stresses taking place due to these deformations are found for composite materials that represent a structure of mutually perpendicular resin-impregnated th
Externí odkaz:
https://doaj.org/article/e27ccccc6a86446ebe321b78a9528b79
Publikováno v:
Наука и техника, Vol 0, Iss 1, Pp 30-34 (2007)
Mathematical model describing a dependence between deformations and stresses in the zone of prepreg piercing zone is given in the paper. Boundary conditions in the piercing zone in number of four functional dependences for prepregs can express either
Externí odkaz:
https://doaj.org/article/d084590f149548e99310bf86c35579aa