45 research outputs found
Magnetoelastic interaction in magnetostriction metals with shift deformations
No full textMagnetostriction materials, the conductivity influence on magnetoelastic processess, shift deformations in ferromagnets are investigated in the paper aiming at the particular features clearing up of the magnetoelastic transformations in metals with shift deformations. As a result non-linear equations of state have been suggested for the description of magnetoelastic effects with shift deformations of a ferromagnet. The independence of the bar twisting angle (Videman's effect) on the form of its cross section has been proved. The influence of a connection coefficient and eddy currents on the Q-factor and frequency of the bar vibration resonance has been calculated. The Bluestain-Gulyaev wave propagation on a conducting magnetoelastic medium has been investigated. The paper results may find their field of application in physics of magnetoelastic effects; in the calculation of devices on magnetoelastic effectsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio
COMPUTER-AIDED FLOW METER APPLICABLE TO LOOSE MATERIALS IN THE COURSE OF PNEUMATIC TRANSPORTATION
No full textThe article covers the issues of development and the results of the pilot testing of the contact-free meter of the two-phase flow of loose construction materials in the course of their pneumatic transportation. The flow meter designed by the author is based on the method of registration of polarization currents caused by the motion of the dielectric material within the electric field of a measurement unit integrated into the pneumatic transportation line. The registration unit is the implementation of the original technology. Its functional concept is based on the Pockels transverse effect inside the lithium niobate crystal. This electro-optical effect is characterized by minimal persistence, as the phase of the optical wave varies within the time period of 10 second, and this effect makes it possible to improve the accuracy of measurements. The flow rates is identified on the basis of one variable integral parameter, the intensity of an optical wave passing through the Pockels cell simulated by the currents of polarization of the material. The paper contains the structural pattern of the computer-aided meter of loose dielectric materials in the course of their pneumatic transportation, the system of visualization of the mass flow, and the results of the pilot testing of the proposed meter. The proposed system may represent an unbiased system of management of construction materials, consumption procedures, and warehouse processing of materials
Initial requirements for agricultural universal block-modular energy device of traction class 0.6
No full textThe state of the tractor industry in Russia is characterized by a deep restructuring of production. This problem is especially acute in the development of modern low-power mobile energy facilities for the mechanization of work in peasant farms. To give a systematic character to the development of this In a promising direction, the initial requirements for an agricultural universal block-modular energy device of traction class 0.6 are proposed
Design features of agricultural transporting technological device equipped with agrophilic wheel mower
No full textNow days there is no a single mass-produced vehicle for agriculture which does not match requirements of the state standard for the maximum allowable impact of movers on the soil. This leads to significant losses and under-harvest of agricultural products. As a promising direction for increasing the efficiency of the transport infrastructure of agricultural production, it is proposed to develop an environmentally friendly transport and technological chassis for agricultural purposes
Microprocessor Control System for a Three-Phase Voltage Inverter with a Modified Algorithm
No full textApplication of three-dimensional molecular hydrophobicity potential to the analysis of spatial organization of membrane protein domains. II. Optimization of hydrophobic contacts in transmembrane hairpin structures of Na+, K+-ATPase
No full textApplication of three-dimensional molecular hydrophobicity potential to the analysis of spatial organization of membrane domains in proteins. III. Modeling of intramembrane moiety of Na+, K+-ATPase
No full textAnalytical Investigation of Surface Wave Characteristics of Piezoelectromagnetics of Class 6 mm
No full textThis short work copes with theoretical investigations of some surface wave characteristics for transversely isotropic piezoelectromagnetic composites of class 6 mm. In the composite materials, the surface Bleustein-Gulyaev-Melkumyan wave and some new shear-horizontal surface acoustic waves (SH-SAWs) recently discovered by the author can propagate. The phase velocities of the SH-SAWs can have complicated dependencies on the coefficient of the magnetoelectromechanical coupling
(CMEMC) which depends on the electromagnetic constant of the composites. Therefore, the analytical finding of the first and second partial derivatives of the represents the main purpose of this study. It is thought that the results of this short letter can help for theoreticians and experimentalists working in the research arena of opto-acoustoelectronics to completely understand some problems of surface wave propagation in piezoelectromagnetics. </jats:p
Propagation of a mode-III interfacial crack in a piezoelectric–piezomagnetic bi-material
No full textAbstractThe transient response of a semi-infinite mode-III interfacial crack propagating between piezoelectric (PE) and piezomagnetic (PM) half spaces is investigated in this paper. The integral transform method together with the Wiener–Hopf and Cagniard–de Hoop techniques is used to solve the mixed boundary value problem under consideration. The existence of generalized Maerfeld–Tournois interfacial wave is discussed and the solutions of the coupled fields are derived for four different cases of bulk shear wave velocity. The dynamic intensity factors of stress, electric displacement and magnetic induction as well as energy release rate (ERR) are obtained in explicit forms. The numerical results of the universal functions and dimensionless ERR for several different material combinations are presented and discussed in details. It is found that the Bleustein–Gulyaev (generalized Maerfeld–Tournois) waves dominate the dynamic characteristics of the interfacial crack propagation in PE–PM bi-material
