By applying the theory of strain fatigue energy loss and the theory of intrigue JIC in elasto-plastic fracture mechanics,a preliminary investigation was made in this research to test the influence of cyclic strain on JIC—the ductile fracture toughness of steels.
By low cycle fatigue (LCF) experimentation of 316L steel under stress control at elevated temperature, some significant results have been obtained. The low cycle fatigue behavior of 316L steel under stress control at elevated temperature has been analyzed. Moreover, based on the energy dissipation and continuum damage mechanics (CDM) , a new model for low cycle fatigue life prediction and a new low cycle fatigue damage model have been established.
For reducing the transient time and energy dissipation,improving efficiency,the paper analyzes in detail the reality of the forward/reversal rotation of the square wave BLDCM,which is used in actuator. According the basic formula of mathematical model,the transient equations of torque and velocity are solved,which are simulated by the software of Matlab. The resulting verifies the reasonability and validity of the conclusion.
We estimated the plasma density produced by relativistic electron beam (REB) ionizing neutral gas, using both ionization theory and another method employed often to study energy losses of electron beam transporting through matter in nuclear physics.
The crystals with multiple. slip orientation, in comparison with single one, are of numerous initial hardenability, saturated stresses and energy losses, while the hysteresis loops shape of single slip orientation crystals become even more rectangular.
Based on the energy flow path of the drive links of machine tools and the consideration that there exists simultaneously various energy losses in machine tools in operation, the energy transmission mathematical models of the main driving system of machine tools are created by analysing synthetically the energy losses in the motor and mechanical system of machine tools, which lays a foundation for the studies on the energy transmission laws, energy saving and energy information monitoring in machining processes.
The peak stresses of various cycles were measured by a digit voltmeter and the stress-strain hysteresis loops for selected cycles were recorded using an X-Y recorder. The energy losses, friction stresses, back stresses and shape parameters of hysteresis loops were measured from the hysteresis loops obtained.
Proceeding from view of overall optimum and minimum energy wastage for water supplying system,and considering practical characteristic of water supplying plant,mathematic model,based on genetic algorithm,is formulated about optimizing combination of pump units,then solution method is given for the mathematic model and acquires much satisfying available values.
A capillary tube was added between the two evaporators in the fresh and frozen food storage chests to raise the evaporation temperature of the refrigerating chamber, and reduce the heat exchange temperature difference and the available energy loss.
Friction drag and energy loss in a turbulent pulsating flow in a tube
The wave resistance is obtained simply by dividing the energy loss per unit time by the velocity of the source.
The dispersion equation for the capillary oscillations of a charged drop of viscous incompressible fluid of finite electrical conductivity with account for energy loss by electromagnetic-wave radiation is obtained.
It is shown that the intensity of the energy loss associated with the electromagnetic radiation of the oscillating drop increases with its conductivity, charge and the surface mobility of the charge carriers.
Functions of energy accumulated in reactive elements are shown to be universal efficiency indexes and define the mass, dimension, energy losses, and stability of a filtering circuit.
The formulas of Mitrokhin for the cascade of radial plates are a particular case which derives from the formulas obtained for the flow equalization radius and energy losses associated with separated flow.
Transverse motion of the gas, due to a change in the cross section of the channel, leads to an increase of Joule energy losses.
It can be concluded on the basis of the results of these studies that at the beginning of the process the mechanical energy losses are smaller than in quasistationary flow.
The analysis of the dynamics of the changes in the relative index, necessary for determining the best conditions for ensuring minimum energy losses when CO2 laser radiation is transmitted through the atmosphere, is investigated.
We show that a valueM' >amp;lt; 122.2 would imply the existence of an internal solar-energy sink leaking energy at a rate Lx >amp;gt;- ((M'-122.2)/67.4)Lo.
Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the ionosphere-magnetosphere coupling.
General conditions for binary formation and disruption are discussed and a qualitative explanation is given for the energy sink behaviour.
It is shown that the so-called energy sink condition is not necessary for stability.
They accrete steadily on to stars; a significant internal stellar energy sink results from their presence in a low-mass star.