86 results about "Inhomogeneous material" patented technology

The invention provides a double safety and effectiveness inspection method of human lumbar bone and implant, and belongs to the field of medicine. The method comprises the following steps: acquiring a 3D (three-dimensional) rendering model of lumbar body bone, lumbar disc and interspinous ligament by a 3D reconstruction technology; performing 3D grid division to the 3D rendering model, and giving attributes of a heterogeneous material to the 3D rendering model; performing 3D modeling to an implant; assembling the lumbar body bone, the lumbar disc, the interspinous ligament and the implant, and analyzing stress and strain of the assembly by adopting uniformly distributed nodal load through a finite element analysis method; simulating visible finite element analysis by a computer before the implant is implanted into a human body. Therefore, the verification requirement to bone and implant double safety and effectiveness can be fulfilled, the damage of the implant to original human lumbar bones can be prevented, double safety and effectiveness of the bones and implant can be guaranteed, the manufacture cost can be effectively reduced along with convenience and quickness, and individual and industrial manufacturing of a human lumbar bone implant can be realized. The method is applicable in the field of implant stress-strain analysis in the orthopedics department.

The invention discloses a preparation method of SiCf/SiC ceramic matrix composite turbine blades, which is characterized in that through analyzing the stress distribution of a blade in an application state, based on this point, a performance-controllable SiCf/SiC ceramic matrix composite turbine blade is manufactured through the designing and adopting of processes such as rapid forming, high-performance continuous yarn braiding, gel-casting, reactive sintering, and the like. According to the method, parts such as blades and the like are manufactured by using heterogeneous materials, the contradiction between the uniformity and nonuniform loaded structure of materials is solved, and the performances of materials can be set flexibly according to the bearing needs of manufactured parts; and prepared SiCf/SiC ceramic matrix composite turbine blades have the characteristics of near-net forming variable-cross-section complex structure, controllable material performance, flexible machining, short production cycle, low cost, and the like, and can be applied to the development and manufacturing of high-temperature-resistant complex structured parts for aerospace and the like.

A system and method to improve the accuracy of the measure of constituent element(s) in a sample containing domains potentially including the constituent element(s) are described herein. For each domain, the volume of the domain is estimated and the concentration of the constituent element(s) in the domain is determined using LIBS. When all the domains have been analyzed, the volumetric concentration of the domains is summed and divided by the total volume of the sample. Accordingly, by limiting the concentration analysis to separate domains, it is possible to improve the accuracy of the concentration analysis.

The invention provides a finite element modeling method of a random microstructure of a heterogeneous material, and particularly relates to a method of establishing a finite element network model of the random microstructure of the heterogeneous material based on microstructure probability distribution information and a random algorithm. The method comprises the following steps of: determining a microstructure probability distribution function by using a real or dummy heterogeneous material component phase physical distribution form; converting a probability distribution function into a discrete space of the model on the basis of establishing the finite element network topological model of the material; and determining material attributes of each unit in the definite element model by using random real numbers generated by a pseudo random number generator and consistently distributed in an interval [0, 1], thereby establishing the random microstructure model of the heterogeneous material. The method is suitable for the heterogeneous materials in different modes; the established definite network model can be directly used for analyzing relation among microscopic property, microscopic structure, macroscopic performance of the heterogeneous material; and basis is provided for development and preparation of a new material.

The invention discloses a random thermal homogenizing analysis method of a two-phase composite material. The method comprises the following steps: (1) establishing a corresponding microscopic homogenization model of a two-phase composite material composed of a matrix and particles, constructing constitutive equations, and calculating the thermal boundary values of the heterogeneous material; (2) determining and analyzing to obtain one RVE from the two-phase composite material, and determining the effective constitutive relationships among the effective heat conduction coefficient, the volumetric average temperature gradient and the volumetric average heat flux, wherein the volumetric average temperature gradient and the volumetric average heat flux are obtained from RVE; (3) applying boundary conditions on RVE, and at the same time carrying out finite element analysis and calculation to obtain the value of effective heat conduction coefficient of the RVE numerical model; (4) establishing a random homogenizing model to obtain the macroscopic effective quantity of the composite material. In the provided method, a finite element method and Matlab software are used to solve the problem of complicated RVE numerical modeling, the influences of parameter randomness of components of the composite material under three boundary conditions on the macroscopic thermal physical properties are taken into account comprehensively, and thus the provided method has an application value, a certain academic value, and theoretical significance.

The present invention relates to a switchable see-through luminescent system, e.g. for luminous signage, characterized by its mode to exist in two different states, transparent (‘off-state’) and luminescent (‘on-state’), due to the presence of a luminescent material (20), coated on to the transparent surface (10), capable of being excited on command by means of lighting sources (30) (e.g. LEDs) characterized by suitable emission spectra. In the off-state of the luminescent material (20), the surface appears transparent and it is not evident any significant modifications of the optical properties (transparency, color, etc.) of the surface. The excitable luminescent material, from which a large variety of luminophores can be conveniently applied on to a substantially transparent support, of arbitrary geometry, realized with a plurality of homogenous and heterogeneous materials, including laminated glass or double glazed windows, provides a large variety of possible shapes capable of satisfying varied application requirements.

The invention discloses a hydraulic bionic muscle which comprises an elastic capsule, high pressure oil openings and mounting earrings, wherein the high pressure oil openings are fixedly connected with the two ends of the elastic capsule; the mounting earrings are arranged in the high pressure oil openings; the elastic capsule is a tubular body with tube openings in two ends; the tube wall of the tubular body is formed by compounding an inner layer, a middle layer and a surface layer; the inner layer is an elastic sealed layer; the middle layer is an anisotropic heterogeneous material layer; the surface layer is a grid protection layer woven by an elastic material. The hydraulic bionic muscle is used for a bionic running robot, is equivalent to the muscle between movement bones of the robot, improves the movement flexibility of the bionic running robot, finishes the movement process of the robot through adopting fuzzy control easily, realizes the personated robot movement, has the characteristics of simple and compact structure, and convenience in connection with a system, and also has the characteristic of simulating the biomechanics features of the human muscle.

A method for forming a topographical image of the heterogeneous variations in a surface of a material has a first machining step and a second scanning step. The preferred machining step uses a preselected scribing tool to scribe a plurality of adjacent grooves in a selected material surface at a preselected constant force. This machining step produces a machined surface whose local elevations relative to a datum plane are dependent on the local hardness or wear resistance of the surface. Then the scanning step shifts the scribing tool across the surface in contact with the surface, and measures the elevation of the tool at a plurality of selected surface coordinates. The measured elevations allow formation of a topological map depicting sub-micron structural features of the surface.

A method and arrangement are disclosed for measuring a flow rate of optically non-homogeneous material in a process pipe. The non-homogeneous material can be illuminated through a window. Images are taken with a camera, through a window, of illuminated non-homogeneous material. Correlation between temporally successive images determines travel performed by the non-homogeneous material in the process pipe between capture of temporally successive images. Velocity of the non-homogeneous material is determined by the time difference between the successive images and the travel.

The invention is directed to a method for introducing an integrated predetermined breaking line in a planar extending article. The method is particularly suitable for introducing an invisible predetermined breaking line with a reproducible, defined tearing resistance by means of a laser in an inhomogeneous material, such as a woven material, which can serve as the decorative layer of an airbag covering. According to the invention, the laser output is controlled depending upon the amount of material along the desired predetermined breaking line.

An endoscope having a distally disposed lens and an optical transmission system which transmits the image of the lens to the proximal end of the endoscope is provided. The transmission system includes at least one reversing system, which includes two elements in mutual mirror-inverted arrangement. Each element includes a rod lens with planar faces and at least one optically thin lens having a planar surface. The rod lenses consist of an inhomogeneous material having a positive dispersion and an inhomogeneous refractive index in the radial direction, while the thin lenses are plano-convex lenses.

The invention is to provide a metal plate of laminated heterogeneous materials, and an iron core of the same, where a plurality of metal plates of different material qualities are easily and stably joined, have characteristics over many applications, may attain low production cost, and provide a making method thereof. That is, a metal plate of laminated heterogeneous materials, which is joined by laminating a plurality of metal plates of different material qualities, is joined by caulking a first material body of the metal plate of the laminated heterogeneous materials having notches at intermediate parts thereof, as well as caulking projections formed by cutting down rows of both ends thereof in the length direction of the notches, and a second material body of the metal plate of the laminated heterogeneous materials formed with caulking holes for inserting the caulking projections, at the caulking projections of said first material body and the caulking holes of the second material body.

A self-adapting stably contacted resistance measurement device comprising an upper conducting substrate and a lower conducting substrate is characterized in that the top of the upper conducting substrate is equipped with a universal-joint spindle. Working surfaces of the upper conducting substrate and the lower conducting substrate are both coated with a soft metal clad which can be fixed on the working surfaces of the upper conducting substrate and the lower conducting substrate by nuts. The device can ensure full contact between the conducting substrates and the end face of a sample and uniform distribution of stable contact resistance and current when passing through the sample and realize accurate measurement. Therefore, the device is applicable to the measurement devices for measuring the resistance and the specific resistance of heterogeneous material.

The invention discloses a thermal deformation tester capable of testing a large-size cement-emulsified asphalt mortar material. The tester comprises a fixed bracket, a liquid circulation temperature chamber and a displacement sensor are mounted on the fixed bracket, a heat preservation cavity of the liquid circulation temperature chamber is internally provided with a test piece, the test piece and the displacement sensor are connected through an ejector rod mounted on the fixed bracket, and the test piece is provided with a temperature sensor. Based on the characteristic that the cement-emulsified asphalt mortar is a heterogeneous material, the tester can test the large-size test piece, and can guarantee the accuracy and the representativeness of the test result. The large-size test piece bracket cooperates with the quartz glass ejector rods in different length, which facilitates further study on service behavior of the cement-emulsified asphalt mortar and cracking mechanism of a filled layer of a slab track structure.

A silica crucible and a fabricating method thereof are provided. The silica crucible includes a vitreous silica body having an inner surface and an outer surface, the inner surface of the vitreous silica body defining a cavity adapted for containing a molten material or a powder material; and a first coating layer formed on the inner surface of the vitreous silica body. The first coating layer is formed by pyrolysing a composite of aluminum, magnesium, calcium, titanium, zirconium, radium, chromium, selenium, barium, yttrium, cerium, hafnium, tantalum, tin or silicon under a predetermined temperature. The first coating layer substantially includes of a nonhomogeneous material, and an interface is defined by the homogeneous material and the nonhomogeneous material between the vitreous silica body and the coating layer. The first coating layer has strong adhesion capability and guarantees the coating layer will not be easily peeled off or removed.

An optimal input design method and apparatus to achieve rapid broadband nanomechanical measurements of soft materials using the indentation-based method for the investigation of fast evolving phenomenon, such as the crystallization process of polymers, the nanomechanical measurement of live cell during cell movement, and force volume mapping of nonhomogeneous materials, are presented. The indentation-based nanomechanical measurement provides unique quantification of material properties at specified locations. Particularly, an input force profile with discrete spectrum is optimized to maximize the Fisher information matrix of the linear compliance model of the soft material.

The invention provides a preparation method of a multi-component new alloy and a component gradient alloy material part. Material-forming integration is achieved, and intermediate steps are reduced. According to the method, heterogeneous materials with variable components, gradient and the like are easily realized; compared with powder, wires are used, the material utilization rate is high, and the forming efficiency is high; the wires made of two or more different materials are sequentially melted according to physical characteristics under the effect of a heat source to form a molten drop, then the molten drop is transited to a base body, all components can be uniformly mixed, component segregation can be reduced or even eliminated, the uniformity of a new alloy material in the forming process can be effectively controlled, the stability of the molten drop transition form is higher, and the probability of forming defects is effectively reduced.

An automatic sorting system is for identifying and sorting non-homogenous material. The system includes a conveyor belt and an identification unit cooperable with the conveyor belt and placed above the conveying surface thereof for identifying material traveling therealong. The identification unit includes at least one projector for projecting a beam of light downwardly towards the conveying surface, at a given height above the conveying surface, and onto a given material to be identified, so that a portion of projected light may be reflected back from the given material and upwardly towards the identification unit. The identification unit also includes at least one lens positioned about the identification unit for receiving the portion of reflected light from the given material to be identified. The identification unit also includes a first processing unit operatively linked to the at least one lens for carrying a spectral analysis of the portion of reflected light captured by the at least one lens so as to determine the nature of the given material, and a second processing unit operatively linked to the first processing unit for comparing results of the spectral analysis with corresponding data associated to a variety of different materials stored in a given database of the second processing unit. The present system also includes a sorting unit operatively linked to the second processing unit and operatively cooperating with the second end of the conveyor so as to sort material released from the second end of the conveyor depending on signals received from the second processing unit.

The invention provides a real-time rendering method for a multilayer inhomogeneous material reflecting object, wherein the method is improved based on a BRDF model. The method comprises the following steps of S10, describing non-uniformity of a ceramic glaze surface in a prepare baking thickness mapping method; S20, obtaining a summit illumination strength calculation formula and an illumination distribution function in the improved BRDF illumination model; and S30, performing brightness adjustment by means of high dynamic range for simulating flexible transition of light on the surface of the ceramic. A model which is rendered through the method accords with an illumination physical characteristic of multilayer inhomogeneous material surface illumination and furthermore can vividly restore a real impression of the multilayer inhomogeneous material object. Furthermore on the condition of relatively large number of sides of the model, high real-time rendering rate can be ensured and a real-time interaction requirement is satisfied.