89 results about "Elastic matrix" patented technology

An electroconductive composition comprising an elastic matrix material and particulate filler material dispersed therein, the particulate filler material comprising fiber particles coated with a conductive material and spheroidal particles coated with a conductive material, the dispersion being such that the fiber-containing particulate filler and the spheroid-containing particulate filler are substantially interspersed, the particulate filler being present in an amount such that the conductive-material coated particles are in electroconductive relationship and such that the composition possesses enhanced flexibility, the conductive material being present in an amount sufficient that the composition has a decreased resistivity. The invention also encompasses a method of preparing these compositions comprising the steps of compounding said filler into a precursor of said flexible matrix material thereby dispersing said fillers throughout the matrix material, and curing the precursor to form the matrix.

Elastic roller and process for producing elastic roller. The elastic roller includes a hard roller core and an elastic coating layer at an outer side of the hard roller core. The elastic coating layer includes an elastic matrix material and fillers imbedded in the matrix material, and at least a portion of the fillers include metallic fillers. The process includes combining at least one metallic filler into an elastic matrix material and applying the combined elastic matrix material and at least one metallic filler onto an outer side of the hard roller core to form an elastic coating layer.

The invention discloses a negative Poisson's ratio lattice structure topology optimization method considering bearing characteristics. The method comprises: firstly, using an improved SIMP interpolation function for defining the relation between the elasticity modulus and the density of a material, then solving an equivalent elastic matrix of a microstructure on the basis of an energy homogenization method, and representing the equivalent elastic matrix by using an equivalent method in allusion to the high nonlinearity of a negative Poisson's ratio expression of the structure; and finally, constructing an optimization model taking the negative Poisson ratio and the rigidity of the structure as targets, solving the topological optimization model by utilizing an improved OC algorithm, and outputting optimal unit cell configurations with different weights. According to the method, the bearing characteristic and the energy absorption characteristic of the structure are represented by the rigidity and the negative Poisson ratio respectively. The provided examples show that the topological optimization method comprehensively considers the structure bearing and energy absorption characteristics, the optimized lattice structure can effectively absorb energy generated by collision, the structure does not collapse in the compression process, and the topological optimization method has acertain bearing capacity.

The electromagnetic-magnetoelectric micro mechanical resonant beam structure consists of matrix and resonant beam in magnetic field, and the composite sensitive structure comprising elastic matrix membrane and double-ended built-in simple resonant beam realizes the resonant measurement of physical quality. Both the matrix and the resonant beam are made with SOI wafer and through epitaxial and etching process, and the matrix with low doping and the simple resonant beam of N type doping in 1x10<19>/cu cm form an integral monocrystalline silicon structure. The resonant beam with electrodes in its two ends is orthogonal with the magnetic field and produces ampere force in the thickness direction during when some current flows in and induced voltage across it during resonance. One closed-loop system is formed based on intermittent principle to eliminate coupling interference trouble. The present invention has simple structure, improved mechanical performance and high stability.

The invention discloses a slippage monitoring sensor and a side slope slipping strain monitoring system. The slippage monitoring sensor comprises an elastic matrix and a fiber bragg grating array which consists of a plurality of fiber bragg gratings packaged in the elastic matrix. By above method, when the locational strain of the slippage monitoring sensor changes, the elastic matrix is deformed under the strain force. Meanwhile, refractive index modulation periods and fiber core refractive indexes of a plurality of the fiber bragg gratings disposed in the elastic matrix change with the deformation of the elastic matrix, further resulting in the change in wave length of reflected light of the fiber bragg gratings. Thus, the slippage monitoring sensor and the side slope slipping strain monitoring system are capable of effectively monitoring the slippage inside the slide slope through a feedback of the change in wave length of reflected light by each fiber bragg grating before and after the change in strain.

The present invention concerns an elastic roller for smoothing a paper web, wherein the roller has a hard metal core, an elastic matrix coating material thereon and an outer layer of memory metal, and is comprised especially of metal is described. The present invention also relates to a method for producing the elastic roller and to a device and method for smoothing paper comprising passing a paper web through a pressure nip formed by the elastic roller core and a hard roll.

The invention belongs to the field of structural optimization design, and particularly discloses a topological optimization method for a multi-material structure. The method comprises the steps of performing finite element mesh generation on a design domain of a to-be-processed object to obtain a preset number of mesh units, and establishing level set functions in one-to-one correspondence with entity materials; calculating an elastic matrix, a rigidity matrix and a displacement vector; calculating a velocity field and a sensitivity degree, and converting or deleting the entity material in thegrid cell according to the sensitivity degree to obtain a level set function after the first optimization under the current iteration; updating to obtain a level set function optimized for the secondtime under the current iteration by utilizing the speed field; and judging whether the result of the second optimization is converged or not according to the flexibility and the volume error. According to the method, the defects that a classical level set topological optimization method depends on initial design and a two-way progressive optimization method cannot obtain a smooth boundary are overcome, the structural rigidity is improved to a certain extent, and the provided method is stable and effective.

The invention relates to a soft-body robot variable-rigidity joint module. The soft-body robot variable-rigidity joint module comprises an active deformation part and a connecting part, wherein the connecting part is connected to the active deformation part; the connecting part comprises an elastic matrix, cylindrical electrodes and sheet electrodes, wherein the cylindrical electrodes and the sheet electrodes are arranged on the elastic matrix; the active deformation part comprises a thermo-sensitive SMP variable-rigidity elastic matrix and EAP soft body drivers, wherein the EAP soft body drivers are arranged on the surface of the thermo-sensitive SMP variable-rigidity elastic matrix; and a flexible heating circuit is embedded in the thermo-sensitive SMP variable-rigidity elastic matrix, the cylindrical electrodes are connected to the flexible heating circuit, and grooves matched with the sheet electrodes of the connecting part are formed in the front end and the rear end of the EAP soft body drivers. Compared with the prior art, the soft-body robot variable-rigidity joint module has the advantages of being good in non-structural environment adaptability, and the active variable-rigidity regulation and control of the soft-body robot can be realized by utilizing the special property of the multi-element intelligent material.

The invention relates to a high-tensile piezoelectric microfiber with two-stage wave structure and a manufacturing method thereof. The manufacturing method comprises: firstly, through an electrostaticspinning method, manufacturing on a two-dimensional programmable displacement table to obtain a piezoelectric polymer microfiber in an in-plane wave structure, then, transferring the piezoelectric polymer microfiber to a sticky and pre-stretched elastic matrix, gradually releasing pre-stretched stress to make the elastic matrix recover to original length, and finally obtaining the piezoelectric microfiber with two-stage wave polymer. A test result shows that the two-stage wave piezoelectric microfiber has deformation capability far exceeding the pre-stretched stress, and good and stable piezoelectric performance, and amplitude-wavelength ratio of the microfiber can be flexibly adjusted at will. The piezoelectric microfiber and the method have important application prospect in the field ofwearable piezoelectric transducers.

The invention discloses a first-order perturbation expansion progressive homogenization method for statistical prediction of an elastic constitutive matrix of random distributed composite materials. The method comprises the steps that (1), according to an actual material domain, the source and range of random variables are determined, and a probability model is established; (2), the random variables are introduced by a material elastic constitutive flexibility matrix based on a first-order perturbation hypothesis, and a stiffness matrix is obtained by inversion; (3), a microscopic representative unit subdomain is intercepted in a macroscopic material structure system, and a functional scale effect relationship on a microscopic representative volume unit is hypothesized based on a progressive homogenization method to derive a virtual work principle equation and establish the equivalence relation between a macro elastic matrix and a finite element equation of a representative volume unitmaterial domain; (4), the equivalence relation between probability and statistical characteristics of the macroscopic elastic matrix and the finite element equation of the representative volume unitmaterial domain is solved; (5), probability and statistical characteristics of elastic engineering constanTS are derived from the macroscopic elastic matrix.

Provided is a heat-dissipating elastic body composition. The heat-dissipating elastic body composition according to an exemplary embodiment of the present invention includes an elastic matrix-forming component including a base resin and a vulcanizing agent, and a heat-dissipating filler. Accordingly, the heat-dissipating elastic body may protect a heating element from a physical stimulus such as a vibration or impact transmitted from the outside to a heat dissipater, and rapidly transduce and radiate heat generated in the heating element. In addition, the heat-dissipating elastic body may minimize vibrations caused by a physical stimulus applied from the outside and a noise thereby by minimizing a gap between a heating element and an exterior material, a heat dissipating element or the like, which is adjacent thereto/in close contact therewith. Further, the heat-dissipating elastic body heating element may minimize deterioration by heat generated by a heating element or an external chemical stimulus and may be easily implemented in various shapes, and therefore, it may be widely applied to all industries requiring heat dissipation.

The invention discloses a polymer-based conductive elastomer and its preparation method. According to the preparation method, a certain percentage of a cross-linking agent is used to crosslink a polymer matrix and the cross-linked polymer matrix is crushed to obtain cross-linked particles; and the cross-linked particles are added in proportion into the matrix to prepare a cross-linked particles/elastic matrix/conductive carbon material composite elastomer. By the above method, conductive percolation threshold of the polymer-based conductive elastomer can effectively be reduced; stretching strength of the polymer-based conductive elastomer under the stretching action can be enhanced; and elasticity of the polymer-based conductive elastomer can effectively be raised, and strain recovery rate of the polymer-based conductive elastomer under strain retraction action can be raised. The polymer-based conductive elastomer prepared by the above method has advantages of good electrical property, enhanced stretching strength and good and stable elasticity and rebound resilience. The method provided by the invention has advantages of simple preparation technology, low cost, short production period and the like during the construction process.

The invention discloses a tubular piezoelectric vibrator and belongs to the field of vibration technology and piezoelectric material application. The tubular piezoelectric vibrator comprises a tubular vibrating body and a support, wherein the tubular vibrating body is composed of an elastic matrix and piezoelectric elements, and the support comprises support rods and a fixed component. The elastic matrix is in an elastic-tube-shaped polyhedral structure, and the piezoelectric elements are pasted on the outer surface or the inner surface of the elastic-tube-shaped polyhedral structure. The outer surface and the inner surface of the elastic-tube-shaped polyhedral structure can be formed by a plurality of planes, or a part of planes and a part of curved surfaces, or curved surfaces. One ends of the support rods are connected with the elastic-tube-shaped polyhedral structure or the piezoelectric elements, and the other ends of the support rods are connected with the fixed component. According to the tubular piezoelectric vibrator, the support is installed at a proper position, and therefore standing wave vibration of the elastic-tube-shaped polyhedral structure can produce large amplitude, and amplitude loss of traveling wave motion can be reduced. The tubular piezoelectric vibrator is suitable for miniaturized products and has application prospect in the fields of cell phone vibrators, ultrasonic motors and the like.

The invention discloses a flexible stretchable conductive material and a device and method for manufacturing the same. A material comprise an elastic matrix, a flexible stretchable conductive mesh, and a plurality of conductive spiral monomers which are arrange in parallel in a row-column manner and are connected into a conductor end-to-end. The method comprises the following steps of: dropping amixture of a conductive helical monomer and an organic solvent onto a metal mask, and low-frequency reciprocating oscillation; Placing a composite body filled with conductive spiral monomer in a heating furnace for heat treatment and welding to form a conductive spiral bundle; Cooling to room temperature; Take out that conductive spiral beam and putting it into a forming die for compaction; Pouring a liquid elastic matrix into the compacted forming die; The flexible stretchable conductive material is obtained by heat curing and demoulding. The invention can effectively avoid the problem of stress concentration and prolong the service life of the material. And the problem of material failure caused by separation of microstructure from elastic matrix after repeated mechanical deformation issolved.

The invention relates to a charging load prediction method for electric vehicles under the guidance of peak-valley time-of-use electricity prices. Firstly, the charging load model of the electric vehicle is established; then, the Monte Carlo simulation method is used to simulate the daily charging load curve; then, the electricity price elasticity matrix is ​​established; finally Calculate the daily charging load curve based on peak and valley time-of-use electricity prices. The invention can accurately reflect the mathematical law between the change of charging users' electricity demand and the change of peak-valley time-of-use electricity price, and solve the problem of inaccurate load prediction of electric vehicles under the peak-valley time-of-use electricity price policy.

The invention discloses a tensile conductive cable and a manufacturing method thereof, which belong to the field of tensile electronics. An elastic matrix and a conductive filler are composite to form the conductive cable. A thermoplastic elastomer is selected as the matrix, and the filler selects a one-dimensional linear or two-dimensional plate-like nano material with high intrinsic conductivity and a high aspect ratio. The manufacturing process comprises steps: the elastic matrix and the conductive filler are mixed to obtain a master batch; then, the obtained blend master batch is used for manufacturing a conductive composite material thin film; and finally, the obtained conductive composite material thin film is cut into ribbons, the ribbons are then twisted into lines, and the tensile conductive cable is manufactured. The conductive composite material cable can be applied to conductive connection of flexible and tensile electronic devices, has advantages of light weight, low cost and the like, has good comprehensive use performance such as high conductivity and high conductive stability under tensile strain, the manufacturing process is simple and free of pollution.

The invention discloses a method for preparing skin of a robot with high flexibility. The method comprises the following steps of S1, utilizing plasma equipment for etching a thermosplastic elastomermatrix material to prepare a flexible elastic matrix, wherein the repetitive unit of the flexible elastic matrix is 1-100 microns, through micro/nano processing technologies of photoetching, microfluid control and 3D printing, particles are introduced to the surface of the repetitive unit, and micro/nano patterning of the surface of a prepared flexible substrate is achieved; S2, coating the surface of the micro/nano patterned flexible substrate with a graphene or carbon nano tube solution to serve as a conductive layer; S3, coating a sensor electronic chip element with a layer of coupling agent, and implanting a pressure sensor electronic chip original element which is subjected to surface treatment into the thermosplastic elastomer matrix through an embedding method. According to the method, electronic chips can be effectively combined with the matrix material, the efficiency of the chips is achieved, and the application range of the electronic skin is expanded.

The invention relates to a rubber plastic and multiwalled carbon nanotube compound elastic matrix and a preparation method thereof and belongs to the technical field of spinning apron formula design.The rubber plastic and multiwalled carbon nanotube compound elastic matrix is prepared from butadiene-acrylonitrile rubber, high-polymerization PVC, multiwalled carbon nanotube, a plasticizer, a stabilizer, a lubrication dispersant, an antioxidant and an anti-aging agent. The preparation method comprises the steps: firstly, prefabricating dispersoid; then smelting and thermoplastic refining into the compound elastic matrix. The rubber plastic and multiwalled carbon nanotube compound elastic matrix disclosed by the invention can serve as a main body material to be applied to the spinning apronformula design, and a manufactured spinning apron can meet a technical requirement of a high-efficiency technology for producing modern novel textile fiber yarns, is suitable for compacting spinning and siro spinning production modes and can be used for implementing a heavy-quantification, large-draft and micro-stroke spinning technology.

The invention discloses a cursor positioning control device and electronic equipment. The cursor positioning control device comprises a base and a control ball, wherein a control room is arranged on the base; a flexible protective film is arranged on the control room; an elastic matrix is filled in the control room; an annular pressure-sensitive sensor is arranged in the control room; the annularpressure-sensitive sensor is arranged on the outer side of the control ball in a sleeved mode; a microswitch located below the control ball is arranged in the control room; and a pressure-sensitive touch panel and a control ball mounting frame are arranged on the microswitch. A control part of the cursor positioning device is the control ball, and through the operations such as movement and pressing of the control ball through fingers, the control of a cursor and the click and dragging functions of a mouse, and the functions of zooming in and out a touch screen by the fingers are achieved. Theelectronic equipment can be mounted on a notebook computer for replacing the touch panel, so that the portability of the notebook computer is improved, and the electronic equipment can also be made into independent input equipment for replacing the mouse to work on an uneven working table.

The invention provides a preparation method of a printable nanocomposite elastic conductor, conductive paste and an electronic fabric. The method comprises the following steps of mixing ethylene glycol dispersion liquid of a silver nanowire with a dimethylformamide solution of a thermoplastic polyurethane elastomer under heating and grinding conditions to obtain mixed paste; and separating out flocky precipitate from the mixed paste in a coagulation bath and obtaining the printable nanocomposite elastic conductor. According to the preparation method, the silver nanowire as a conductive filler,the thermoplastic polyurethane elastomer as an elastic matrix and dimethylformamide as a solvent are mixed under the heating and grinding conditions, and then the nanocomposite elastic conductor is separated out in the coagulation bath; and the silver nanowire and the elastic matrix have good compatibility and have good dispersity in the nanocomposite elastic conductor, so that the nanocompositeelastic conductor has a low conductive threshold and good conductivity, also has good flexibility and elasticity and good sensing property and can be printed into the electronic fabric.

The invention discloses a novel magnetorheological elastomer based on a dynamic polymer matrix and a preparation method. The invention relates to the technical field of dynamic polymers and magnetorheological materials at the same time, and the novel magnetorheological elastomer with dynamic polymer polyimine as the matrix is prepared. According to the preparation method, an easily available and cheap terephthalaldehyde monomer, a diamine monomer capable of forming an elastomer in a chemical structure and a triamine cross-linking agent with equivalent activity are adopted, and a temperature-segmented continuous solution polymerization reaction mode is adopted, so that when the polymerization degree reaches a gel point, uniform compounding of a polyimine elastic matrix and carbonyl iron powder is realized. The novel magnetorheological material has remarkable magnetic response performance, also has the dynamic response characteristic of a dynamic polymer, and is a multi-responsiveness intelligent material. The dynamic polymer is applied to the field of magnetorheological materials, a novel polymer matrix is provided for the magnetorheological materials, a multi-response function is developed, and new application is developed for the dynamic polymer and the magnetorheological material at the same time.