8 results about "Two phase composite" patented technology

The invention relates to the technical field of composite material structure dynamics analysis, and provides a method and system for predicting the inherent frequency of a three-phase functionally graded composite material conical plate, and the method comprises the steps: employing an improved Halpin-Tsai model to calculate the equivalent parameters of a GPL-containing two-phase composite matrix, solving the equivalent parameters of a three-phase composite layer, and calculating the inherent frequency of the three-phase composite material conical plate. The method comprises the following steps: constructing a nonlinear geometrical relationship between a displacement field and a strain field, calculating a stiffness coefficient of each layer, constructing kinetic energy of the three-phase composite material conical plate, calculating an energy coefficient according to the stiffness coefficient of each layer, constructing potential energy of the conical plate according to the energy coefficient, and constructing a modal displacement function by adopting a Chebyshev polynomial and a boundary function. And establishing a characteristic equation based on a minimum potential energy principle and solving to obtain the inherent frequency of the three-phase composite material conical plate. According to the method, efficient calculation of the inherent frequency of the three-phase composite material conical plate is achieved, and the reliability and engineering application value of structural dynamics analysis are remarkably improved.

The invention relates to the technical field of composite material additive manufacturing, in particular to a reverse prediction method for a composite material additive manufacturing component with adjustable and controllable dielectric properties. The method comprises the following steps: preparing a plurality of composite material additive manufacturing components with different physical parameters through an additive manufacturing technology; testing to obtain a data set, wherein the data set comprises physical parameters and dielectric properties of the composite material; the data set is preprocessed and then input into a prediction model for training, and the trained prediction model is used for predicting the dielectric property of the composite material additive manufacturing component corresponding to the corresponding physical parameters. According to the method, the additive manufacturing technology is adopted for preparing the composite material additive manufacturing components with different physical parameters; according to the two-phase composite material, the dielectric property of the composite material additive manufacturing component under different additive manufacturing physical parameters is predicted through machine learning, and the method is low in preparation cost, simple in technological process and accurate in performance regulation and control and performance prediction.

The invention discloses a structure regulation and control method for an ultra-fine grain NbMoTaW-Cu composite material based on interface stability difference and a product obtained through the method, and belongs to the technical field of refractory high-entropy alloy and powder metallurgy. The preparation method comprises the following steps: firstly, preparing nanocrystalline NbMoTaW single-phase solid solution powder through mechanical alloying, and compounding the nanocrystalline NbMoTaW single-phase solid solution powder with Cu powder to obtain composite powder; then carrying out rapid hot pressing sintering to obtain a compact sintered body; and finally performing controllable heat treatment. According to the method, the difference of the thermal stability of the phase boundary and the grain boundary between the refractory high-entropy phase and the Cu phase is utilized, migration and redistribution of the Cu phase are regulated and controlled through the heat treatment temperature, then grain coarsening and phase size refinement of the refractory high-entropy phase are induced, and therefore a dual heterostructure containing the grain size difference and a two-phase composite area is formed in the composite material. The method is simple in process, good in repeatability and free of subsequent deformation processing. The obtained composite material has high strength and high plasticity, and has wide application prospects in the fields of aerospace, nuclear industry and the like.

This invention relates to a method and system for suppressing torque ripple during inter-turn short-circuit faults in permanent magnet synchronous motors (PMSMs), belonging to the field of fault-tolerant control technology for inter-turn short-circuit faults in PMSMs. The invention aims to address the shortcomings of existing technologies in suppressing torque ripple caused by inter-turn short circuits and the lack of system strategies for two-phase composite faults. First, mathematical models of the motor under normal, single-phase, and two-phase inter-turn short-circuit fault conditions are established to analyze the generation mechanism of torque ripple. When a single-phase inter-turn short circuit occurs, a compensation current is injected into the three-phase stator current to completely cancel out the torque ripple term. When a two-phase inter-turn short circuit occurs, the compensation components caused by each phase fault are calculated based on the principle of linear superposition and then injected together to obtain the three-phase reconstructed reference current. This invention can be used for the smooth and fault-tolerant operation of PMSMs after inter-turn short-circuit faults, and is particularly suitable for applications requiring high torque stability, such as electric vehicles and servo drives.

The present application relates to the technical field of composite structure dynamics analysis, and provides a method and system for predicting the natural frequency of a three-phase functionally graded composite conical plate, which comprises the following steps: calculating the equivalent parameters of a two-phase composite substrate containing GPL by using an improved Halpin-Tsai model, solving the equivalent parameters of a three-phase composite layer, constructing the nonlinear geometric relationship between the displacement field and the strain field, calculating the stiffness coefficient of each layer, constructing the kinetic energy of the three-phase composite conical plate, calculating the energy coefficient according to the stiffness coefficient of each layer, constructing the potential energy of the conical plate according to the energy coefficient, constructing the modal displacement function by using Chebyshev polynomials and boundary functions, establishing the characteristic equation based on the principle of minimum potential energy and solving it, and obtaining the natural frequency of the three-phase composite conical plate. The present application realizes efficient calculation of the natural frequency of the three-phase composite conical plate, and significantly improves the reliability and engineering application value of structural dynamics analysis.

The invention provides a Mo2C-Na2Mn8O16 composite material with synergistic lattice strain and a preparation method of the Mo2C-Na2Mn8O16 composite material, and belongs to the field of inorganic materials. The preparation method comprises the following steps: dissolving a sodium molybdate dehydrate solid, a manganous nitrate aqueous solution, a potassium permanganate solid and an ammonium bicarbonate solid in deionized water, and carrying out hydrothermal reaction, filtration, drying and calcination treatment to obtain a target material. The composite material has the morphology that micron-sized cubes and nano-particles coexist, the structural stability of the material is remarkably enhanced by means of synergistic lattice strain caused by two-phase compounding of Mo2C and Na2Mn8O16, and then the electrochemical performance of the composite material in the zinc ion battery is effectively improved. The preparation method is simple in process and easy to implement, and the obtained composite material shows good stability as an aqueous zinc ion battery positive electrode material and has a wide application prospect.

The invention discloses a method for optimizing two-phase composite fuel liquid phase sintering process parameters. The method comprises the steps that thermodynamic parameters and dynamic parameters of all phases are obtained through calculation according to the first principle, technological parameters and characterization parameters of the sintering process are obtained through experimental data, and a Navier-Stokes equation and a phase field model of two-phase composite fuel liquid phase sintering are established; bidirectional coupling of a flow field and a phase field is achieved through a step-by-step projection method, a Navier-Stokes equation and a phase field model are solved, and microstructure features in the liquid phase sintering process are obtained; a machine learning agent model is constructed, the liquid phase sintering process microstructure features obtained through simulation serve as input, and characterization parameters obtained through sintering serve as empirical parameter items in a target optimization physical equation; and a Navier-Stokes equation and a phase field model for liquid phase sintering of the optimized high-precision two-phase composite fuel are established through iterative loop. According to the method, accurate prediction of the liquid-phase sintering morphology of the two-phase composite fuel is realized, so that a preparation process route is optimized.

This invention relates to the field of anti-corrosion coating technology, and discloses a modified epoxy anti-corrosion coating resistant to high temperature and strong acid and its construction method. The coating comprises an organophosphonic acid-functionalized phenolic epoxy resin, an organosilicon-modified epoxy resin, a linear phenolic resin curing agent, and a latent curing accelerator. The latent curing accelerator is a complex of imidazole and zinc chloride. The construction method includes mixing the two-phase composite resin matrix with the curing agent and cooling it, adding the curing accelerator for high-speed shear dispersion and vacuum degassing, and pouring it into a preheated mold for segmented heating and curing. The organosilicon system containing a silicon-oxygen backbone, combined with a high-crosslinking density phenolic network, increases the resistance to penetration by acidic media and resists high-temperature pyrolysis; the organophosphonic acid groups coordinate with the metal surface, improving interfacial adhesion; and the latent control of the complex combined with segmented curing releases shrinkage stress, preventing micro-cracks in the anti-corrosion coating.