A new finite element analysis principle based on neural networks is proposed. It can realize the finite element analysis in real time. The neural computation of a simple structure was simulated on digital computer, th...A new finite element analysis principle based on neural networks is proposed. It can realize the finite element analysis in real time. The neural computation of a simple structure was simulated on digital computer, the effect of input parameters on convergent speed and precision was analyzed. Before solving a certain FE problem, the linking weight matrix of the neural net, i.e., the global stiffness matrix of the structure analyzed, must be defined. In this paper, a method which uses the BP net to compute the element stiffness matrix in real time is proposed.展开更多
By using the geometric analysis of grand potential, the molar grand potential-effective chemical potential curve of solution with magnetic transition can be obtained from the relevant molar free energy diagram, and it...By using the geometric analysis of grand potential, the molar grand potential-effective chemical potential curve of solution with magnetic transition can be obtained from the relevant molar free energy diagram, and it is shown that the grand potential and effective chemical potential can be separated into paramagnetic and magnetic terms. In addition, the CVM has been combined with the present magnetic transition free energy model such as M. Hillert and T. Nishizawa's models to calculate phase equilibria between solutions with magnetic transition, and this combined method has been applied to the alpha/gamma phase equilibrium in the Fe-Mn binary system and found to be feasible.展开更多
The effects of solution (quench) temperature on the properties of SiCW/Al composite have been investigated using tensile tests. The experiments indicate that the solution temperature of the composite fabricated by P/M...The effects of solution (quench) temperature on the properties of SiCW/Al composite have been investigated using tensile tests. The experiments indicate that the solution temperature of the composite fabricated by P/M technique can be raised to 560 degrees C. The tensile strength of the composite is obviously dependent on solution (quench) temperature and the composite solutionized at 540 degrees C exhibits a maximum of tensile strength and elongation-to-failure. These results can be accounted for by the variation of the dislocation density in the composite.展开更多
On the basis of regular solution sublattice model and classical nucleation and growth theory, strain induced precipitation kinetics in Nb-Ti-V combined treated microalloying steels has been calculated. The calculated...On the basis of regular solution sublattice model and classical nucleation and growth theory, strain induced precipitation kinetics in Nb-Ti-V combined treated microalloying steels has been calculated. The calculated precipitation-time-temperature diagram is in reasonable agreement with experimental results obtained from isothermal stress relaxation method. (Edited author abstract) 11 Refs.展开更多
文摘A new finite element analysis principle based on neural networks is proposed. It can realize the finite element analysis in real time. The neural computation of a simple structure was simulated on digital computer, the effect of input parameters on convergent speed and precision was analyzed. Before solving a certain FE problem, the linking weight matrix of the neural net, i.e., the global stiffness matrix of the structure analyzed, must be defined. In this paper, a method which uses the BP net to compute the element stiffness matrix in real time is proposed.
文摘By using the geometric analysis of grand potential, the molar grand potential-effective chemical potential curve of solution with magnetic transition can be obtained from the relevant molar free energy diagram, and it is shown that the grand potential and effective chemical potential can be separated into paramagnetic and magnetic terms. In addition, the CVM has been combined with the present magnetic transition free energy model such as M. Hillert and T. Nishizawa's models to calculate phase equilibria between solutions with magnetic transition, and this combined method has been applied to the alpha/gamma phase equilibrium in the Fe-Mn binary system and found to be feasible.
文摘The effects of solution (quench) temperature on the properties of SiCW/Al composite have been investigated using tensile tests. The experiments indicate that the solution temperature of the composite fabricated by P/M technique can be raised to 560 degrees C. The tensile strength of the composite is obviously dependent on solution (quench) temperature and the composite solutionized at 540 degrees C exhibits a maximum of tensile strength and elongation-to-failure. These results can be accounted for by the variation of the dislocation density in the composite.
文摘On the basis of regular solution sublattice model and classical nucleation and growth theory, strain induced precipitation kinetics in Nb-Ti-V combined treated microalloying steels has been calculated. The calculated precipitation-time-temperature diagram is in reasonable agreement with experimental results obtained from isothermal stress relaxation method. (Edited author abstract) 11 Refs.
