424 results about "Young's modulus" patented technology

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 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 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.

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).

The invention provides a copper-based composite material performance prediction method based on a space-time attention mechanism, and the method comprises the steps: obtaining a microstructure diagram and stress-strain data through molecular dynamics simulation, extracting topological features through a diagram attention network, and dynamically adjusting the parameters of a time sequence convolution network; a cross-space-time attention module is constructed, and bidirectional feedback fusion of space feature screening and time sequence feature optimization is realized; and finally, carrying out dimensionality reduction and nonlinear transformation on the fused features through a full-connection layer, and outputting performance prediction values such as yield strength and Young modulus. According to the method, the precision and reliability of performance prediction of the copper-based composite material can be improved, and efficient and accurate theoretical support is provided for material design and performance optimization.

The invention discloses a Young modulus measurement system and a measurement method thereof, and belongs to the technical field of Young modulus measurement. The device comprises a laser, a pinhole filter, a lens, a beam splitter, a first reflector, a second reflector, a beam combiner, an interference fringe receiver and a computer, laser emitted by the laser sequentially passes through the pinhole filter and the lens and then reaches the beam splitter, and the beam splitter divides the laser into two beams, the two beams of light are converged at the beam combiner after being reflected by the first reflector and the second reflector respectively to generate interference, and the interference fringe receiver receives interference fringes and transmits signals to the computer. According to the invention, the tiny deformation of the metal wire is converted into more visual and easier-to-observe interference fringe spacing change, and the accuracy of a Young modulus measurement result and the sensitivity of a measurement process are remarkably improved.

A medical tube has flexibility and stretch resistance at a high level. The medical tube has a tubular core layer, and an outer layer composed of a resin and disposed on the outer periphery of the core layer, having an outer peripheral surface substantially parallel to the axial direction of the medical tube. The core layer has a tubular inner core layer composed of a fluorine-based resin, and an outer core layer composed of a resin having a higher Young's modulus than the fluorine-based resin, and disposed on the outer periphery of the inner core layer. The core layer has a specific structure in which a hill portion projecting toward the radial outer side of the medical tube and a valley portion projecting toward the radial inner side of the medical tube are repeatedly disposed in the axial direction of the medical tube.

The application discloses a three-dimensional ferroelectric material based on two-dimensional ice stacking and preparation and application thereof, and belongs to the technical field of ferroelectric materials and multifunctional devices. The material is a three-dimensional periodic crystal structure of monoclinic P21 space group, water molecules in the material form a completely saturated network through hydrogen bonds, and there is no suspended hydrogen; interlayers are coupled through van der Waals force to form a multi-level cooperative ferroelectric sequence of "in-plane hydrogen bond ferroelectric + interlayer van der Waals ferroelectric". The material has the characteristics of a wide-bandgap semiconductor (band gap 5-6 eV), extreme anisotropic mechanical properties (Z-axis Young's modulus 48.6 GPa, Eyx=0.973), moderate bulk modulus (12.23 GPa), good acoustic performance (sound velocity 2638 m / s) and extremely high pressure stability (0-3000 GPa structure is complete, 1190 GPa metalization transition). The material can be widely applied in the fields of X-ray optical devices, ferroelectric memories, deep ultraviolet photoelectric detectors, extreme high-pressure sensors, directional stress sensors, mechanical logic devices, surface acoustic wave filters, multifunctional integrated microsystems and multi-parameter composite sensing networks, and opens up a new direction for pure water-based functional materials.

Implementations of the present disclosure generally relate to liner layers and methods of forming liner layers for through glass vias. In one or more implementations, a liner layer is deposited on a glass substrate having a plurality of vias disposed through the glass substrate. The method includes depositing an adhesion layer onto and in a via of the plurality of vias to form the adhesion layer, the adhesion layer having a thickness of about 100 Angstroms to about 550 Angstroms, a tensile stress of about -30 MPa to about 80 MPa, and a Young's modulus of about 115 GPa to about 200 GPa and depositing a second layer onto the adhesion layer, the second layer having a thickness of about 2,000 Angstroms to about 60,000 Angstroms, a compressive stress greater than about -50 MPa, and a Young's modulus of about 35 GPa to about 70 GPa.

The application relates to a high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel and a photo-curing preparation method thereof. The high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel is obtained by mixing a regenerated silk fibroin solution and a solution containing acylated chitosan, then performing ultrasonic treatment and photo-curing, the compressive stress is 1000-1200 kPa, the maximum strain is 50-60%, and the Young's modulus is 300-400 MPa. The high-elasticity chitosan / silk fibroin semi-interpenetrating network hydrogel provided by the application has good mechanical properties, elasticity and biocompatibility, and has a good application prospect in the field of biomedical materials.

A package structure and a method of forming the same are provided. The package structure includes a first die, a second die, a first encapsulant, and a buffer layer. The first die and the second die are disposed side by side. The first encapsulant encapsulates the first die and the second die. The second die includes a die stack encapsulated by a second encapsulant encapsulating a die stack. The buffer layer is disposed between the first encapsulant and the second encapsulant and covers at least a sidewall of the second die and disposed between the first encapsulant and the second encapsulant. The buffer layer has a Young's modulus less than a Young's modulus of the first encapsulant and a Young's modulus of the second encapsulant.

The invention relates to a Young modulus measuring device and measuring method.The measuring device comprises an optical lever optical amplification system and a large and small container equal-volume liquid amplification system, the amplification factor is improved, and therefore the accuracy of a measuring result is effectively improved; the layout that a tester and a scale telescope need to be separately arranged on two desks in a traditional optical lever method is abandoned, the problems that the traditional method occupies a large space and is limited by the space of a laboratory are thoroughly solved, and the method is suitable for small and medium-sized laboratories and teaching scenes where multiple groups of experiments are parallel; and meanwhile, the operation difficulty is reduced, the measurement efficiency and the experiment stability are effectively improved, and the equipment maintenance cost is also reduced.

An optical fiber having an acoustic sensitive fiber bragg grating includes an optical fiber core having a pair of fiber bragg gratings formed therein such that each fiber bragg grating is spaced apart from each other. A cladding material is disposed on and surrounds at least a portion of the fiber core. The cladding material has at least one material characteristic associated therewith, where the at least one material characteristic may be a Young's modulus less than a Young's modulus of the fiber core, a photoelastic coefficient greater than a photoelastic coefficient of the fiber core, or a combination thereof. The ultrasonic sensor includes at least one optical fiber embedded in a polymer layer and a backing layer and an acoustic matching layer.