22 results about "Hyperelastic material" patented technology

To provide an arch wire for orthodontics that can reduce pain and discomfort during orthodontic treatment by using a low-rigidity wire. [Solution] The orthodontic archwire 10 has a loop portion 30 formed in a predetermined shape to enable loop mechanics, and is made of a superelastic material selected from the group consisting of nitinol, titanium-molybdenum alloy (TMA), and gum metal, which have a Young's modulus of 100 GPa or less. When the loop portion is activated, a force that slowly returns to its original shape acts continuously on the target tooth, physiologically promoting tooth movement and reducing pain during treatment, and further reducing the risk of complications due to excessive force, such as root resorption and damage to periodontal tissue.

The embodiment of the present disclosure provides an anti-impact and vibration-reducing and noise-reducing integrated multifunctional metamaterial structure and a preparation method thereof, and relates to the technical field of multifunctional metamaterials.The method comprises the following steps: manufacturing a super-elastic material structure, which is based on a curved beam structure; taking the super-elastic material structure as a core and a polygonal metal frame as a boundary, a single cell structure with super-damping effect is constructed; the single cell structure is constructed into a lattice structure in the form of a fractal structure, and the lattice structure is arranged according to a preset requirement to synthesize a metamaterial plate; and the polygonal metal frame boundary form and the number of the metamaterial plates are adjusted according to an application scenario to form an anti-impact and vibration-reducing and noise-reducing integrated multifunctional metamaterial structure.The anti-impact and vibration-reducing and noise-reducing integrated multifunctional metamaterial structure and the preparation method thereof can solve the defects that the current anti-impact metamaterial structure has a large thickness and a single function and is difficult to be applied to actual engineering problems.

A guidewire formed from a superelastic material has a proximal section and a distal section. In order to improve torque and pushability in the proximal section, a first wire is wound clockwise onto the proximal section to form a first coil and a second wire is wound counterclockwise onto the first coil to form a second coil.

The invention discloses a hyperelastic material large strain visual measurement method based on surface grid deformation identification, which comprises the following steps: processing a hyperelastic material to be measured into a dumbbell-shaped sample, and constructing uniformly distributed regular grid lines on the surface of a scale distance section of the sample; stretching the sample at a preset stretching rate, and continuously collecting surface grid deformation images of the sample while stretching; identifying the position of each grid line in each frame of image; and according to the position change condition of the corresponding grid lines in the two adjacent frames of images, determining the strain condition of the hyperelastic material at each moment under the preset stretching rate. The invention aims to solve the problems that a traditional measurement method is inaccurate in measurement under the condition of large strain of the hyperelastic material, for example, speckles chapped and deformed in a random speckle sample laying method are difficult to recover, an extensometer cannot obtain local strain and results have uncontrollable factors, and a traditional DIC method is large in measurement error under large strain.

The application discloses a phase transition super-elastic material topology optimization method based on a nonlinear constitutive model and belongs to the technical field of intelligent material structure design and multi-physical field optimization. The method comprises the following steps: establishing a super-elastic constitutive model containing a martensitic volume fraction to describe the coupling relationship between material phase transition behavior and mechanical properties; constructing a topology optimization model with the minimum structural flexibility as an objective and the volume fraction and a balance equation as constraints; adopting an additional super-elastic technology of dynamic reconstruction to solve the numerical instability problem in the optimization process; performing sensitivity analysis through an adjoint vector method; and obtaining an optimal topology configuration through iterative solution by using an optimal criteria method. The application can efficiently and stably realize the structure optimization of the phase transition super-elastic material, significantly improves the calculation efficiency and numerical stability of the optimization process, and is suitable for the structure design of intelligent materials such as shape memory alloys in the fields of aerospace, medical devices and the like.

The invention relates to an impact speed mechanical sensor applied to a severe environment, and relates to the field of sensors, the impact speed mechanical sensor comprises a shell, an upper cover plate, an inner core and a force sensor, the force sensor is placed at the bottom of the shell, and a plurality of groups of square strips which are different in length and made of super-viscoelastic and super-elastic materials are arranged in the inner core at intervals; the inner core is placed on the force sensor, the upper cover plate is placed on the inner core and is in sliding connection with the shell, and the device has the advantages that impact signals can be converted into visual information or force signals only through a mechanical structure, and the device can be widely applied to impact monitoring scenes with high requirements for reliability and environmental adaptability.

The application discloses an isogeometric analysis simulation method of a hyperelastic material model based on body subdivision. The isogeometric analysis adopts the division of a spline model parameter domain and the mapping of the parameter domain to a physical model, avoids the time consumption of mesh division in a finite element, and realizes an integrated process from modeling to simulation in combination with a CC subdivision method. The application comprises the following steps: converting a CC subdivision body into a spline body model, and establishing a mapping relationship of control points of the subdivision body and the spline body; establishing a hyperelastic material constitutive model according to geometric boundary conditions and material parameters; establishing a discrete balance equation of the model according to an isogeometric method; in combination with the balance equation, establishing a model motion equation and a nonlinear solving system; using a Newton iteration method to solve the nonlinear system, obtaining displacement solutions at each time step, and mapping the displacement solutions back to the subdivision body, so as to realize deformation simulation of the subdivision body.

The application discloses a kind of simulation dinosaur three-dimensional modeling optimization method and system, method constructs rigid body skeleton system based on Lagrange dynamics;According to the muscle layer of super-elastic material of anatomical attachment point, the displacement field is calculated using position-based dynamics method;Skin layer is constructed outside, Cauchy stress is projected to grid vertex, and wrinkle and scale texture are dynamically generated according to principal strain;The grid simplification degree and physical simulation accuracy of corresponding area are dynamically adjusted by calculating perceptual importance weight;Establish the quadratic programming problem with anatomical constraint to realize motion reorientation and angular momentum distribution;And construct deformation prediction cache model to carry out online constraint correction.The application realizes the unity of high-precision biological feature restoration and high-efficiency real-time rendering.

To reduce man-hours and prediction time required for predicting rigidity of a rubber material.SOLUTION: The rubber material characteristic prediction method includes a tensile test process S1 for acquiring a stress-strain relation by a tensile test for one representative rubber material among a plurality of rubber materials, and a representative Young modulus acquiring process S3 for acquiring Young modulus of the representative rubber material. Further, the method includes an identification process S2 for calculating the material parameters of the strain-energy-density functions of the superelastic material model by identifying the strain-energy-density functions of the superelastic material model and the stress-strain relationship, and a relational equation derivation process S4 for deriving the relational equations between the material parameters and the Young's moduli.SELECTED DRAWING: Figure 1

The invention provides an annular sample, a clamp and an axial tension pure shear test method, belongs to the field of material mechanical property test, and aims to thoroughly solve the problem of non-uniform pure shear stress field caused by necking phenomenon. Under axial tension, a sample global uniform pure shear stress field is achieved, the pure shear stress-strain relation of the hyperelastic material is directly solved according to force and displacement data of the sample, and the influence of tension displacement and strain is avoided. The mechanical property of the rubber material can be better evaluated. Through verification, an annular sample tensile test has good substitutability for a plane tensile test.

We provide a bio-anchor that can be implanted and removed with minimal invasiveness. [Solution] The bio-anchor 1 is a bio-anchor that is incorporated into a living body and includes a cylindrical sleeve 2 having a through hole 10 extending from the outside to the inside of the living body, and a pin 3 that is inserted into the through hole and expands the sleeve. The sleeve may be made of a superelastic material, and a slit extending parallel to the through hole may be formed in at least a part of the sleeve. Only one slit may be formed and may extend in the direction of the opening of the through hole.

The application discloses a preparation method of a shape memory alloy plate with high-temperature super-elasticity, and belongs to the technical field of shape memory alloys. The shape memory alloy is a nickel-titanium-tantalum alloy, and the preparation method mainly comprises hot rolling, batch cold rolling large plastic deformation and recrystallization annealing, so as to refine the microstructure and control the grain size. The nickel-titanium-tantalum shape memory alloy plate prepared by the method has good super-elasticity when the temperature is higher than 100 DEG C, can recover a strain of more than 5%, and has high cycle stability. Compared with the nickel-titanium-hafnium high-temperature shape memory alloy, the shape memory alloy plate only adds 5.7% of Ta, and the raw material cost is obviously reduced, and is a super-elastic material which can be applied to a high-temperature environment of 100-180 DEG C.

The present disclosure provides a guide wire system comprising (a) a guide wire having a distal end and a proximal end, wherein the guide wire comprises a superelastic material, (b) a first connector coupled to the proximal end of the guide wire, (c) a second connector coupled to the guide wire between the distal end and the proximal end, (d) an electromagnetic sensor coupled to the distal end of the guide wire, and (e) a polymeric tube surrounding the guide wire and at least a portion of the electromagnetic sensor.

A kind of deformation detection method of flexible constant force clamping mechanism under displacement input, after the two-dimensional grid model of the flexible constant force clamping mechanism to be measured is constructed, based on the Mooney-Rivlin second-order strain energy function model of super-elastic material and initialization model parameters are generated according to boundary constraint condition and load setting;Based on the virtual work principle discretization equation under the static equilibrium state of continuum, using the displacement control method based on displacement increment iteration, the action point of load application, i.e. control point is handled by displacement application and the displacement increment of corresponding non-constrained point is solved, then the node position coordinates and model coefficients are updated until the convergence criterion is met;Finally, the node deformation solution meeting the equilibrium equation is obtained, and the node displacement, internal stress and other data of the process are processed and charted.The present application can quickly and conveniently model similar examples with simple parameter setting, and obtain the structure deformation condition and force-displacement output characteristic results with high precision.

The invention discloses a titanium-nickel-zirconium-tantalum high-temperature shape memory alloy wire and a preparation method thereof, and belongs to the technical field of shape memory alloys. The chemical formula of the titanium-nickel-zirconium-tantalum high-temperature shape memory alloy wire is (Ti < 50-x > Ni < 50 > Zr < x >) < 100-y > Tay according to the atomic percent, x is equal to 15-17 at.%, and y is equal to 15-17 at.%. The titanium-nickel-zirconium-tantalum high-temperature shape memory alloy wire prepared by the method consists of four alloy elements, namely nickel, titanium, zirconium and tantalum. The plasticity and the superelasticity in an alloy system can be remarkably improved by adding the tantalum element under the condition of high zirconium content, and the material is a shape memory and superelasticity material which can be applied to a high-temperature environment.

The present technology is directed to implantable medical devices comprising an electrical circuit for powering one or more active components of the device, such as an actuation element, an engine, or a sensor. The electrical circuit can include one or more inductors having a plurality of receiving coils that generate a current in response to being exposed to an electromagnetic field. The current generated by the receiving coils can be used to directly or indirectly power the one or more active components. The inductors can have one or more wires having a non-concentric configuration such that, in addition to generating the current for powering the device, the receiving coils also anchor a portion of the device when it is implanted. For example, the receiving coils can be at least partially composed of a superelastic material such that they exhibit superelastic properties at body temperature.

The utility model discloses an anti-vibration and anti-impact bumper deflector, which relates to the technical field of automobile bumpers, and comprises a deflector body, a connecting frame fixedly arranged on the deflector body and connected with the automobile bumper, and a composite buffer structure arranged in the deflector body, a base layer, a reinforcing layer, a buffer layer and a protective layer are sequentially stacked on the composite buffer structure from inside to outside, the base layer is made of butyl rubber, the outer side face of the butyl rubber abuts against the inner side face of the reinforcing layer, the reinforcing layer is made of glass fiber reinforced polyurethane, and the outer side face of the glass fiber reinforced polyurethane abuts against the inner side face of the buffer layer. The buffer layer is made of closed-cell foaming silica gel, the closed-cell foaming silica gel is filled with a hyperelastic material, the outer side face of the buffer layer abuts against the inner side face of the protective layer, and the protective layer is made of a polyamide-based composite material. The anti-vibration and anti-impact bumper guide plate is good in buffering performance, high in strength and high in structural stability.

The present application belongs to the field of foil type dynamic pressure air bearing, and particularly relates to a dynamic pressure air radial bearing adopting double-layer circumferential variable stiffness wave foils, comprising: a bearing seat, a plurality of foil groups, wherein the foil group comprises: a flat foil which is in the shape of a whole circular arc and is coaxially arranged with the bearing seat; a wave foil which is in the shape of a whole circular arc and is arranged between the inner wall of the bearing seat and the outer wall of the flat foil; the wave foil comprises: an inner layer wave foil and an outer layer wave foil, the inner layer wave foil is arranged on the side close to the flat foil, and the outer layer wave foil is arranged on the side close to the inner wall of the bearing seat; the inner layer wave foil is prepared from super-elastic material, and the outer layer wave foil is prepared from elastic material; the dynamic pressure air radial bearing adopting double-layer circumferential variable stiffness wave foils has the advantages of high load capacity and strong stability during high-speed operation.

The invention discloses a method for predicting vibration characteristics of a core removing machine. The method comprises the following steps of: 1, constructing a finite element modeling method of a core removing machine vibrator; step 2, establishing a parameter identification method for the rubber vibration isolator of the core removing machine, and establishing equivalent modeling of a vibration part of the core removing machine by a method of adjusting equivalent elastic modulus of a corresponding rubber part aiming at each excitation frequency; a structure amplitude-frequency response curve is obtained by combining sine excitation with frequency sweep analysis, and then the rubber elasticity modulus is inverted by comparing the structure amplitude-frequency response curve with a signal analysis curve obtained through experiments; iteratively calculating the elastic modulus of the rubber material through a multi-objective genetic optimization algorithm; and 3, predicting the vibration characteristics of the core removing machine for replacing key components of the core removing machine. According to the method, equivalent linear vibration dynamics modeling can be carried out on the core removing machine containing superelastic materials such as rubber, so that the maximum acceleration amplitude of the vibration structure of the core removing machine with different plate spring thicknesses is predicted while nonlinear parameters are identified.

The invention discloses a satellite storage tank shake suppression device based on a hyperelastic material, and relates to the technical field of storage tank shake suppression. The bottom of the storage tank shell is provided with a propellant outlet, the flow guide plate is connected with the propellant outlet, and the bottom rigid anti-shaking plate is fixedly connected with the top of the flow guide plate; a filtering structure is arranged on the bottom rigid anti-shaking plate; a top rigid anti-sway plate is arranged above the bottom rigid anti-sway plate, and a flexible anti-sway plate is arranged between the top rigid anti-sway plate and the bottom rigid anti- An elastic film is laid on the upper surface of the inner wall of the storage box shell. The liquid level exceeds the flexible anti-shaking plate, and the shaking amplitude can be effectively reduced due to the large damping characteristic of the flexible anti-shaking plate; the liquid level is lower than the flexible anti-shaking plate, the flexible anti-shaking plate is subjected to large deformation due to liquid impact, and the impact force of shaking on the wall surface of the storage tank is reduced; the liquid level is lower than the bottom rigid anti-shaking plate, and the bottom rigid anti-shaking plate, the filter screen and the flow guide plate gather liquid around the propellant outlet by utilizing the surface tension effect in a microgravity environment, so that the problem that fuel cannot flow out smoothly due to shaking is avoided.