576 results about "Young's modulus" patented technology

The invention relates to a defect detection method and system based on multi-modal feature fusion. The method comprises the following steps: acquiring multi-modal data of a transformer; predicting based on the multi-modal data through the fusion prediction model, and outputting an elastic modulus distribution diagram of the insulating material in the transformer; carrying out super-resolution enhancement on the elastic modulus distribution diagram based on a physical constraint diffusion model; and positioning the defects of the transformer through a time reversal algorithm on the basis of the internal Young modulus distribution and the super-resolution elastic modulus distribution diagram of the transformer. According to the invention, the problems of feature loss, large single modal error, fuzzy fractal defect reconstruction, insufficient defect positioning precision and the like caused by signal attenuation in traditional detection are solved. According to the method, the signal-to-noise ratio and modulus distribution prediction precision of the signal is remarkably improved, micron-order super-resolution reconstruction is achieved, winding deformation and insulation layering are accurately distinguished, harm is quantified, traditional imaging limitation is overcome, and a high-precision and physically consistent basis is provided for transformer state evaluation and maintenance.

The invention discloses a welding thermal stress simulation method, device, equipment and medium based on a crystal plasticity finite element, and relates to the technical field of welding thermal stress finite element simulation. The method comprises the steps that a sample is prepared according to a specific multi-phase metal material, and phase distribution and crystal orientation information of a two-dimensional plane of the material are obtained through a metallographic experiment; and a three-dimensional multi-grain model is constructed based on the two-dimensional information. According to the method, a crystal plastic constitutive model is adopted to describe the flowing behavior of the material at high temperature, crystal slippage and polycrystal interaction are considered, the influence on the material performance is reflected from the microstructure evolution level, and the problem that the influence on the macroscopic mechanical performance of a microstructure is difficult to capture in welding multiphase metal material simulation is solved; two-dimensional representation is obtained through a metallographic experiment, the Young modulus and rigidity matrix parameters are accurately calculated by combining forward stretching and shear simulation, the rigidity matrix precision is improved, a temperature field area is divided, stress evolution and residual stress are calculated by combining a thermal-elastic-plastic model, and the welding thermal stress calculation precision is improved.

The invention discloses a method and device for measuring structural parameters of an MEMS cantilever beam, and the method comprises the steps: placing the MEMS cantilever beam on an objective table of a nanoprobe station, and guaranteeing that the thickness direction of the MEMS cantilever beam is perpendicular to a horizontal plane; measuring the length l and the width b of the MEMS cantilever beam by using a microscope; controlling a micro probe of the nano probe station to descend until the micro probe is in contact with the surface of the MEMS cantilever beam; continuously controlling the micro-probe to descend, and recording the displacement X and the loading stress F of the micro-probe at the same time; carrying out linear fitting by utilizing a preset calculation device displacement X and the loading stress F to obtain the deformation rigidity K of the MEMS cantilever beam; and calculating the thickness h of the MEMS cantilever beam based on the deformation stiffness K, the length l, the width b and the Young modulus E. The measuring method is wide in application range and low in testing cost.

The invention belongs to the technical field related to structure optimization design, and discloses a topological optimization method and device for a metamaterial microstructure capable of bearing a band gap, and the method comprises the steps: (1) respectively defining an interpolation penalty coefficient of a Young modulus for the homogenization analysis of the microstructure and the band gap problem of an energy band structure according to the performance analysis of the microstructure, calculating an interpolation penalty coefficient of the mass density; (2) carrying out homogenization analysis of the microstructure based on dynamics to obtain equivalent physical property parameters and determine equivalent material modulus; (3) defining an irreducible first Brillouin region wave vector path of the microstructure based on the geometric symmetry constraint of the microstructure, and further calculating a band gap quality factor between adjacent energy band curves of the microstructure; and (4) establishing a topological optimization model which takes the equivalent modulus as a grading constraint and takes band gap quality factor maximization as a target, and performing iterative optimization based on the topological optimization model to obtain an optimal microstructure configuration. According to the invention, efficient and stable design of the microstructure is realized.

The invention discloses a preparation method of a shape memory polymer nanorod array, and belongs to the technical field of bionic adhesive materials. According to the method, on the basis of an anodic aluminum oxide template, hydrophilic or hydrophobic chemical modification is carried out on the surface of the anodic aluminum oxide template, the surface wettability of a template pore channel is adjusted, and then the permeation behavior of an epoxy resin precursor in the pore channel is controlled. The preparation method comprises the following specific steps: modifying an AAO template, preparing and defoaming an epoxy resin mixture, filling the template, curing, removing an aluminum substrate, dissolving an aluminum oxide layer, and finally obtaining the shape memory polymer nanorod array with high Young modulus (1-20 GPa). According to the method, a template method is combined with chemical modification, the process steps are clear, the conditions are mild, the method is particularly suitable for preparing a hard micro-nano composite structure matched with the mechanical property of a gecko script characteristic material, and an effective technical support is provided for research of a high-performance dry adhesive material.

A three-dimensional elastography method based on a vision-based tactile sensor. The method comprises several steps, which respectively involve: performing system construction and data processing, and acquiring contact deformation data collected by a vision-based tactile sensor; performing forward simulation; performing inverse optimization; calculating gradient information inside a target object, deriving the derivative of an objective function with respect to Young's modulus, calculating the partial derivative of a resultant force with respect to an elasticity distribution, and calculating the overall gradient of the objective function with respect to Young's modulus distribution; and outputting a Young's modulus distribution obtained by means of reconstruction and outputting a quantization reliability index. The method can realize accurate reconstruction of a Young's modulus distribution inside soft objects under robotic tactile sampling, and can output a corresponding reliability index, thus having high levels of practicability.

An orthosis for support of a joint, adapted to the thumb or wrist, having sleeve-like main member made of an elastic material, adapted to envelop the joint and distal and proximal limb portions on either side of the joint, elastically deformable panel housed in a pocket formed in the main member, and non-elastic bracing device for bracing the main member and a proximal portion of the panel around the proximal limb portion, the panel being configured such that, over at least 50 % of the length of the main member along the limb portions, including a limb portion covered by the bracing device, the panel has a cross-section occupying more than 30 % of the perimeter of the underlying limb, the panel having a stiffness defined by a Young's modulus between S and 10 MPa, while the material forming the main member has a stiffness of a lower order of magnitude.

The invention discloses titanium-rare earth synergistic alkali-free glass with an ultrahigh strain point and high resistance and a preparation method of the alkali-free glass, and belongs to the technical field of glass. According to the alkali-free glass, a unique titanium-rare earth synergistic enhanced network is constructed, two key control parameters, namely, a high temperature performance index (HTPI) and a resistance synergistic factor (RCF), are defined for the first time, and when the HTPI is controlled to be 5.8-7.2 and the RCF is controlled to be 3.5-4.85, the strain point of the glass is larger than or equal to 745 DEG C, and meanwhile, the glass has the advantages that the glass has the good heat resistance and heat resistance; according to the glass substrate prepared by the preparation method disclosed by the invention, the resistivity at 1620 DEG C can be accurately regulated and controlled within an ideal interval of 50-150 omega.m, meanwhile, the Young modulus is greater than or equal to 88 GPa, the liquidus temperature is less than or equal to 1260 DEG C, the comprehensive performance is far better than that of the prior art, and the strict requirements of high-generation LTPS and IGZO display panel manufacturing on the glass substrate are perfectly met.

The invention discloses a manufacturing method of a flexible piezoresistive sensor, which comprises the steps of conductive composite material preparation, sensitive layer microstructure forming, sensor integrated assembly and the like, and is characterized in that conductive particles and an elastic polymer matrix are uniformly compounded to form an integrated sensitive layer structure; an interface problem caused by Young modulus mismatch in a traditional two-layer structure is eliminated from a material source, meanwhile, a micro geometric structure is elaborately designed and copied on the surface of the sensitive layer, and an externally applied pressure signal is ingeniously converted into effective local stress concentration. According to the structural design, the change rate of the contact area between the sensitive layer and the electrode can be amplified, so that the sensor can generate remarkable electric signal response to tiny pressure change.

An optical component including: a substrate on which an optical element is mounted; a transparent sealing member disposed above the substrate and configured to seal the optical element; and a bonded portion in which a plurality of metal films are laminated, and which is configured to bond the transparent sealing member and the substrate. The bonded portion includes: one or more stress relaxation layers constituted by one or more metal films having a Young's modulus of less than or equal to 150 GPa, the one or more stress relaxation layers having a total thickness of greater than or equal to 1.2 μm; and a diffusion prevention layer disposed on each of both sides in a thickness direction of each of the one or more stress relaxation layers, and configured to prevent diffusion of metal constituting the stress relaxation layer.

A deformable wheel with non-pneumatic load bearing intended to equip a vehicle for rolling under extreme conditions such as those encountered on the moon and on Mars, includes a hub, a laminated annular strip including a plurality of concentric ferrules which are assembled with the interposition of interposing layers each composed of a material whose Young's modulus is 600,000 to 1,000 times lower than that of the ferrules, and a plurality of metal cables. Each cable connects the hub to the laminated strip while being fixed, on the one hand by an external end to the laminated strip, and on the other hand by an internal end to the hub by means of an elastic member making it possible to modulate the radial stiffness of the cables. Each elastic member is associated with an abutment able to limit its deformation.

The invention discloses a quantitative evaluation method for shale brittleness based on bedding characteristics, and relates to the field of petroleum and natural gas engineering, in particular to the quantitative evaluation method for the shale brittleness based on the bedding characteristics in the exploration and development process, and the quantitative evaluation method comprises the following steps: taking a rock sample from shale at a target layer to obtain the maximum Young modulus of a block; calculating a macroscopic brittleness index; processing the rock sample into a cuboid rock block for a nanoindentation experiment, calculating an interlayer heterogeneous coefficient between two corresponding adjacent probes according to mechanical parameters at the same transverse position between stratums so as to obtain a microscopic brittleness index, and calculating the total brittleness index of the rock by combining the microscopic brittleness index with the macroscopic brittleness index; microcosmic rock mechanics experimental data between different stratums of shale are tested on the basis of nanoindentation for the first time, heterogeneity between different stratums is quantitatively calculated, quantitative evaluation of shale rock microscopic brittleness is achieved, and compared with a conventional macroscopic evaluation method, quantitative evaluation is further improved.

An information recording medium disc according to an embodiment is a disc having a plate thickness of 0.51 mm or less, and is provided with a substrate and a cover layer. The substrate has one main surface and another main surface, and also has a side wall surface connecting the two main surfaces. A cover layer covers both main surfaces and side wall surfaces of the substrate. The disk has a specific elastic modulus E / d [106 m2 / s2] of 40 or more as calculated from a Young's modulus E [GPa] and a density d [g / cm3]. When 30 [G] impact of 2 [m seconds is applied to the disk in the normal direction of the main surface of the disk substrate in a state in which the inner peripheral end of the disk is fixed, the maximum amplitude caused by vibration in the thickness direction of the outer peripheral end of the disk substrate is 0.25 mm or less.

The present invention provides an alkali-free glass sheet, which has a content of Li2O+Na2O+K2O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.

The invention discloses a method for rapidly optimizing components and heat treatment of super martensitic stainless steel, and relates to the technical field of material research methods.The method comprises the steps that firstly, a wide component FCC phase region of a stainless steel system is determined according to a phase diagram calculation result, end component components are determined, and then two end components are obtained through smelting and linear cutting in sequence; and fixing the two end components together, annealing and carrying out subzero treatment to obtain a super martensitic stainless steel diffusion couple, and finally carrying out component gradient analysis and hardness and Young modulus test on the diffusion couple to obtain the corresponding relationship among the components, hardness and Young modulus of the stainless steel under different heat treatments. Therefore, the composition of the high-hardness super martensite and corresponding heat treatment parameters are determined. A large amount of approximately continuous phase composition-component-heat treatment-hardness-Young modulus corresponding experimental data information can be obtained in a short time, and the high-performance martensitic stainless steel and heat treatment parameters thereof can be quickly optimized.

The invention relates to the technical field of electric transmission line electrical insulating materials, in particular to a modulus gradient epoxy resin based composite insulator and a preparation method thereof. The sheath is divided into a plurality of layers, and each layer is formed by a resin mixture obtained by mixing an epoxy resin matrix and an inorganic filler; the epoxy resin matrix at least comprises epoxy resin and a curing agent; in a plurality of layers of the sheath from outside to inside, Young modulus is distributed in a gradient decreasing manner, and elongation at break is distributed in a gradient increasing manner; the adjacent sub-layers of the sheath form a nonlinear interface profile. The composite insulator provided by the invention has excellent tracking resistance, excellent tensile property and excellent gradient structure interface performance.

The application provides a high-strength calcium-aluminum-silicon glass-ceramics and a preparation method thereof, and belongs to the field of electronic ceramic materials. The material composition is as follows: CaO is 15-25wt%, Al2O3 is 10-15wt%, SiO2 is 50-65wt%, and ZnO+BaO is 10wt%. The high-strength calcium-aluminum-silicon glass-ceramics provided by the application has the main crystal phase of wollastonite CaSiO3, the secondary crystal phase of barium feldspar BaAl2Si2O8 and quartz SiO2. By adjusting the Zn / Ba ratio, the bending strength 193MPa and the Young's modulus 79GPa are improved, the thermal expansion coefficient 5.11ppm / ℃ is improved, and the reliability of the ultra-large scale integrated circuit package is improved. In addition, the preparation method provided by the application has the advantages of low cost, simple process and the like, is beneficial to industrialized production, and has potential application value for the ultra-large scale integrated circuit package substrate.

The present invention relates to a glass article (10) that includes cover glass (12) and a frame (14) that is bonded to a principal surface (12B) side of the cover glass (12) via an adhesive layer (16). The cover glass is provided with a curved part that protrudes toward principal surface (12B). The adhesive layer (16) includes at least one of a first adhesive layer and a second adhesive layer. The thickness, Young's modulus, and perimeter of the cover glass, the radius of curvature of the curved part, and the area of the adhesive layer have a specific relationship.

An apparatus for force measurement includes a cavity package and a pressure sensor arranged in the cavity package. Additionally, the apparatus includes a first material and a second material arranged in the cavity package. The first material encloses the pressure sensor. The second material covers the first material, exhibits a higher Young's modulus than the first material, and is configured to transfer an external force applied to the second material to the first material. The pressure sensor is configured to measure pressure within the first material resulting from the external force.

In order to obtain a high-frequency module with less warping, small size, and high connection reliability, a wiring substrate is provided, which has: a core material made of glass, having a first surface, a second surface opposite to the first surface, and a through-hole passing through the first surface to the second surface; a first adhesion layer formed so as to adhere to the first surface and an inner wall of the through-hole, and further block a bottom of the through-hole on the second surface side; a second adhesion layer adhering to the second surface and the first adhesion layer blocking the bottom of the through-hole on the second surface side; a first wiring layer laminated on the first adhesion layer; and a second wiring layer laminated on the second adhesion layer, wherein in a case where a total area of the first wiring layer is set as A, and an area occupied by copper in the first wiring layer is set as B, a residual copper rate C of the first wiring layer is represented by C=B / A (%), C=70-100%, and a Young's modulus of a material of the first adhesion layer is 0.1-0.85 times a Young's modulus of a material of the first wiring layer.

This invention relates to hot-stamped components and a method for manufacturing the same. The hot-stamped component comprises a steel plate and an Al-Si based coating layer formed on at least one surface of the steel plate. Residual stress exists in the steel plate of the hot-stamped component, and the peak position of the diffraction lines is changed by altering the incident angle φ while irradiating the steel plate with X-rays. The slope M is obtained by linear regression using the least squares method, and the slope M is multiplied by the residual stress value calculated from the stress constant K obtained from the Young's modulus and Poisson's ratio of the steel plate according to Equation 1, which is between 5 MPa and 70 MPa. [Equation 1] K = -E / 2(1+v)*cotθ*π / 180, where E is the Young's modulus in MPa, v is the Poisson's ratio, and M is the slope of the regression line 2θ-sinθ. 2 θ and 2θ are the diffraction angles in ° without strain, and K is the stress constant in MPa.

A hard disk drive enclosure base includes a main base composed of a first material and having at least one bottom opening therethrough, a base insert composed of a second material having a higher Young's modulus than the first material and inserted into a corresponding opening of the main base, and a friction stir weld (FSW) coupling the base insert to the main base. The base may further include a thin film sealing material between a base insert flange and the main base, which is heated by way of the FSW process and further hermetically seals the interface between the base insert and the main base. Such a base insert may be used to support with additional stiffness the spindle motor assembly and / or the actuator assembly, and provides for increasing the number of disks while maintaining sufficient rigidity in a standard form factor drive while maintaining a hermetically-sealed enclosure.

The invention discloses a compressibility evaluation method and system for a deep coal rock reservoir based on logging information, and the method comprises the steps: obtaining a longitudinal wave time difference and a transverse wave time difference according to the sound wave information in the logging information; calculating the shale content in the deep coal rock reservoir according to the gamma value in the logging information; respectively calculating dynamic Young modulus, static Young modulus and tensile strength in the deep coal rock reservoir according to the transverse wave time difference, the longitudinal wave time difference and the shale content; a dynamic Poisson's ratio and a static Poisson's ratio are calculated according to the transverse wave time difference and the longitudinal wave time difference, and then the brittleness index of the deep coal rock reservoir is calculated according to the static Poisson's ratio and the static Young modulus; and carrying out compressibility evaluation on the deep coal rock reservoir according to the tensile strength and the brittleness index. According to the method, the calculated tensile strength and brittleness index are used as evaluation indexes to evaluate the coal seam, a quantitative coal seam compressibility evaluation standard is formed, and an effective reference is provided for coal seam gas exploration and development decisions.

A biosensor includes a periodic crystalline structure first layer, and an amorphous crystalline structure second layer. The first and second layers are formed from a biocompatible silicone having a Young's Modulus E between 0.4 and 2.0 MPa. The biosensor has a pressure dependent NIR resonance peak shift of less than 15 nm over a field of view of 40°, and has an optical pressure sensitivity of between 0.38 and 2.6 nm / mm Hg. The biosensor may be formed by forming a 3D crystalline structure having a periodic amorphous crystalline first layer and an amorphous crystalline second layer. Voids of the 3D crystalline structure are filled with the biocompatible silicone / polydimethylsiloxane a material. The 3D crystalline structure is removed to form an inverse structure having a first volume of an amorphous arrangement of voids and a second volume of a periodic arrangement of voids.

An alkali-free glass includes, in mol % in terms of oxides: SiO2: 63-75%; Al2O3: 10-16%; B2O3: 0-5%; MgO: 0.1-15%; CaO: 0.1-12%; SrO: 0-8%; and BaO: 0-6%. [MgO] / [CaO] is 1.5 or smaller. A value of Formula (A) is 82.5 or larger. A value of Formula (B) is 690 or larger and 800 or smaller. A value of Formula (C) is 100 or smaller. A value of Formula (D) is 20 or smaller. The alkali-free glass has a Young's modulus of 83 GPa or larger and a surface devitrification viscosity ηc of 104.2 dPa·s or higher.

The present application belongs to the field of mechanics, and particularly relates to a method for eliminating error of a quasi-static compression mechanics experiment system. By using a constant pressure or a constant loading speed of a pressure head on a testing machine to perform quasi-static uniaxial compression on a test piece at room temperature, and taking two test pieces of different heights, the relationship between the system stiffness, the force and deformation of the system pressure head can be obtained, so as to obtain two corresponding force-time curves and displacement-time curves. By combining the two equations and eliminating the unknown Young's modulus E, the stiffness coefficient of the test system can be obtained, and the displacement-time curve of the pressure head can be obtained. Subsequently, the Young's modulus E can be inversely solved. The present application corrects the error of the mechanics experiment by defining the system stiffness coefficient, so as to realize a higher precision of the Young's modulus E and improve the accuracy of the quasi-static mechanics experiment.

A colored optical fiber comprises a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein a Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer, and wherein the saturated Young's modulus of the primary layer is smaller than or equal to 0.85 MPa.

A testing method for Young's modulus and Poisson's ratio based on a square plate is provided, which including: obtaining a height, a length, a density, and a quality information of the square plate specimen; measuring the first-order torsional frequencie and the second-order torsional frequencie of the square plate specimen; calculating Poisson's ratio based on the height, the length, the first-order torsional frequency, and the second-order torsional frequency of the square plate specimen; calculating the Young's modulus of the square plate specimen based on the Poisson's ratio and the density. The method establishes a continuous function relationship between the parameter set of the test specimen and the torsional frequency using homotopy method, which can be used to calculate Poisson's ratio. When the material density and Poisson's ratio are known, the Young's modulus can be calculated in conjunction with ANSYS software. The method has advantages in both testing efficiency and accuracy.

One method includes filling a cavity of a mold defined by one or more boundaries with an uncured concrete mix such that the uncured concrete mix comes into contact with or surrounds a piezoelectric sensor within the mold, receiving one or more electrical signals from the piezoelectric sensor as the uncured concrete mix cures within the mold to define a concrete sample, determining an electrical signal frequency spectrum from the electrical signal(s) received from the piezoelectric sensor, determining one or more resonant frequencies of the concrete sample based on the electrical signal frequency spectrum, determining a Young's modulus of the concrete sample based on one or more of its resonant frequencies, and outputting the determined Young's modulus or information based on the determined Young's modulus.

A roll-to-plate process for texturing or patterning discrete substrates, such as displays, lighting or solar panels comprising the steps of supplying an imprinting lacquer, texturing or patterning the imprinting lacquer with an imprint texture which imprint texture is formed by openings and elevations thus creating volumes in the imprint texture to obtain an imprinted lacquer and optionally followed by curing the imprinted lacquer to obtain a solidified textured or patterned layer, characterized in that the texturing or patterning is performed with an imprint texture that comprises domains of greater volumes at its edges, and with a flexible stamp with a Young's Modulus of between 0.1 Giga Pascal (GPa) and 10 Giga Pascal (GPa).