43results about How to "Accurate Mechanical Properties" patented technology

The invention provides a method for preparing large-size bulk amorphous composite materials, which belongs to the field of preparing amorphous alloy (metallic glass) and composite materials thereof. The method applies to superplastic diffusion bonding of bulk amorphous substances and fiber, and is characterized in that the bulk amorphous substances and the fiber are arranged in a certain mode (such as a layered mode and the like), put into a mold, pressurized and thermally insulated under gas protection or vacuum for superplastic diffusion bonding; pressure is released after a certain period of time; and workpieces are taken out of the mold. The invention also provides a novel device for preparing large-size bulk amorphous, fiber/amorphous composite materials through superplastic diffusion bonding. The device consists of a heating system, a heat insulation system, a mold system, a loading system, a gas protection system and a cooling system. The method and the device have the advantages of reinforcing the fiber, enabling the shape of amorphous alloy-base composite materials to be designed, enabling the volume of the fiber in the composite materials to be controlled and enabling the fiber to be used in other various amorphous alloy systems low in amorphous formation capability, and are applicable to armor boards, armor-piercing shells and the like.

The invention discloses a piezoelectric composite material helicopter blade structure and a control method thereof. A piezoelectric composite material is embedded into a composite material lamination structure of a rotor blade. An analysis model is established and is capable of accurately describing the motion rule of the rotor blade based on a structure model, an aerodynamic force model, a piezoelectric composite material model and the like, and further accurately calculates the dynamics characteristics of the rotor blade. According to the control method, a controller is employed for controlling the rotor blade, a Kalman observer is employed for obtaining rotor blade data under the condition of white noise interference, and the rotor blade data is taken as input variable for controlling, and further by using the controller to control the input voltage of the piezoelectric composite material, the purpose of controlling blade dynamics response and deformation is finally realized. The provided model establishing method and the control method have relatively high versatility and accuracy, help to accurately obtain dynamics characteristics of the helicopter rotor blade, and are high in control efficiency.

An in-situ compressed specimen of copper interconnection micro column, which is a circular metal column formed in a PDMS hole, includes: a specimen part and a fixed end part for fixing the specimen; wherein the fixed end part is a circular or square plate structure, the specimen part is an upper part of the fixed end part; a main body of the present invention is of micron order, a forced direction of the specimen is consistent with a growth direction of the metal column. A method of electroplating copper column by adopting PDMS as template substrate is applied to overcome a problem that TSV is corrosive to the copper column during a silicon etching process so as to affect a mechanical property accuracy test, the method is advanced in shortening test process period, achieving good reproducibility and high yield.

The invention discloses a preparation method of M6C type alloy carbide Fe3W3C and belongs to the technical field of new materials. The method comprises the steps that Fe powder and WC powder are used as raw materials, and after the raw materials are uniformed mixed, sintering is conducted through a spark plasma sintering (SPS) and vacuum interface remelting method; then, after an obtained sintering sample is crushed, phase analysis is conducted; other impurity phases are removed through an acid pickling method, and deacidification treatment, drying treatment and the like are conducted on the powder; and then, sintering is conducted on the powder, so that a ternary carbide Fe3W3C material is finally obtained. The ternary phase carbide Fe3W3C prepared through the method contains few impurities; in addition, the preparation temperature is low; an obtained structure is uniform and good in mechanical performance; and great significance is achieved for researching microcosmic interfaces of tungsten-carbide-reinforced-steel (iron)-based composites.

An optical assembly having x, y and z axes and comprising: (a) a first substrate having a planar surface, a first wall adjacent and substantially perpendicular to the planar surface, a first register surface adjacent the first wall, at least one foundation to receive an optical element having a first optical axis at least partially along the z axis; (b) an opto-electrical device (OED) having a top surface, an active area on the top surface having a second optical axis normal to the top surface, and a first alignment element defined on the top surface, the OED mounted to the first wall such that the first alignment element contacts the first register surface to position the OED on the first substrate along at least one of the x or y axes with the second optical axis parallel to the planar surface.

The invention provides a testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering a substrate-adhesive cement interaction effect, and relates to a dynamic shear complex modulus testing method, aiming at solving the problems that the tested dynamic shear complex modulus of the bulk-phase asphalt adhesive cement has errors, caused by the fact that the substrate-adhesive cement interaction effect is ignored by the dynamic shear complex modulus, tested by an existing method, of the bulk-phase asphalt adhesive cement. The method comprises the following steps: preparing an original asphalt adhesive cement test piece; testing to obtain dynamic shear complex modulus detection values G of the asphalt adhesive cement test piece corresponding to different testing thicknesses L; drawing an L/G-L curve diagram; carrying out linear fitting according to a formula L/G=A+1/G0L, so as to obtain a fitting linear function gradient 1/G0; then calculating to obtainbulk-phase asphalt adhesive cement modulus G after considering the substrate-adhesive cement interaction effect. According to the dynamic shear complex modulus testing method provided by the invention, a complicated microcosmic-macroscopic interaction effect spanning mechanism is greatly simplified and the substrate-adhesive cement interaction effect influence is accurately separated to obtain thereal dynamic shear complex modulus of the bulk-phase asphalt adhesive cement.

The invention discloses a GIS fault accurate positioning method and a positioning system thereof based on vibration signals, wherein a GIS fault accurate positioning system is adopted. The GIS fault accurate positioning system comprises a vibration sensor, a data acquisition instrument and a PC which are connected in sequence, wherein the vibration sensor is fixedly arranged on the shell surface of the GIS device. The GIS fault accurate positioning system based on the vibration signals, provided by the invention, which acquisition of vibration signals has no electrical connection with GIS equipment, has the advantages of simple structure, easy operation, economy and practicability. The GIS fault accurate positioning method based on the vibration signals, provided by the invention, has theadvantages that the mechanical fault and the insulation fault can be accurately positioned at the same time, and the positioning accuracy is higher than that of the prior means and methods.

The invention discloses a clamp and a method for detecting mechanical property of a rolled composite material thermal simulation test sample. The clamp comprises a first clamp sleeve and a second clamp sleeve which are oppositely arranged, wherein a first containing groove and a second containing groove which can contain a composite material are respectively formed in the first clamp sleeve and the second clamp sleeve; a first vertical guide post and a second vertical guide post are respectively arranged at the upper end and the lower end of the first clamp sleeve; a third vertical guide post and a fourth vertical guide post are respectively arranged at the upper end and the lower end of the second clamp sleeve; the vertical guide post is connected with a second slide block on the third vertical guide post; the fourth vertical guide post is connected with a first slide block on the second vertical guide post; a first clamping head is arranged at the upper end of the first vertical guide post; a second clamping head is arranged at the lower end of the fourth vertical guide post. The related mechanical property of a rolled composite material can be obtained by stretching the first clamping head and the second clamping head by a stretcher to separate the first clamp sleeve from the second clamp sleeve.

The invention belongs to the technical field of bionic macromolecular composite materials, and relates to a preparation method and an application of a skeleton-imitating macromolecular composite material for a dummy. The composite material is prepared by the steps: firstly, treating an inorganic filler with an industrial coupling agent; secondly, fully and uniformly mixing thermosetting resin, theinorganic filler, a cross-linking agent and the like, carrying out pouring low-temperature pre-curing, and then carrying out heating curing; or fully and uniformly mixing thermoplastic resin, the inorganic filler and the like, and carrying out high-temperature casting molding. The macromolecular composite artificial bone material with similar mechanical properties of skeleton at different parts of a human body can be prepared by changing the types, weight fractions and the like of the raw materials. In a three-point bending mechanical test, the bending strength of the composite material is 30-160 MPa, and the bending modulus of the composite material is 5-18 GPa. The prepared macromolecular composite artificial bone material is a bionic material having the mechanical properties highly similar to those of human skeletons at different parts, and can meet the application requirements of developing the dummy with the test requirements of simulating collision, penetration and the like.

The present invention relates to a material interaction interface numerical simulation method considering nonlinearity and strain rate effect. The material interaction interface numerical simulation method considering nonlinearity and strain rate effect comprises the following steps of: establishing a constitutive relation model of tangential bonding-sliding and normal opening/compression nonlinearity of a material interaction interface under the action of a quasi-static load; quantifying the reinforcement effect of the strain rate effect and strain rate nonlinearity on the quasi-static constitutive relation model in the tangent direction and normal direction of the material interactive interface; defining the influence of the plastic damage effect on the tangential and normal constitutiverelation of the material interaction interface; establishing the failure judgment criterion of the material interaction interface in the hybrid mode; and defining a cohesive unit for the numerical simulation of the material interaction interface according to the material interaction interface constitutive relationship formed in the previous step based on LS-DYNA user-defined material module. Thematerial interaction interface numerical simulation method considering nonlinearity and strain rate effect can comprehensively and accurately describe the mechanical properties of the material interaction interface in the first and second modes, and reflects the dynamic performance of the material interaction interface under the strain rate effect and the nonlinearity and the influence of the plastic damage effect on the material interaction interface performance.

The invention discloses a device for determining isotropic electrical properties in a soil body compression process, a sample is arranged between an upper bearing plate and a lower bearing plate, an upper electrode plate and a lower electrode plate are respectively arranged at the top and the bottom of the sample, and an axial displacement sensor and a pressure sensor are arranged at the top of the upper bearing plate; radial electrode plate pairs are arranged at different height positions of the sample, and each radial electrode plate corresponds to one radial displacement meter. The invention further discloses a method for determining the isotropic electrical properties in each direction in the soil body compression process. The sectional area of the test sample at any time can be obtained, a result is corrected, the test accuracy is improved, and the result is more reliable. The internal structure change and the isotropic electrical properties of the soil body in the unconfined compression process can be analyzed more comprehensively through multi-path measurement. Resistivity and displacement changes are synchronous real-time data, so that the continuity of the test and the correlation of the data are improved.

The invention discloses an efficient and automatic detecting and sorting system for cosmetic brushes. A cosmetic brush rotating module, a vision detecting module, a sorting module and a controller module are included; the cosmetic brush rotating module comprises an installing plate, a first clamping device rotationally connected to the installing plate, and a rotating driving device driving the first clamping device to rotate; the vision detecting module comprises a camera shooting device with a lens facing one side of the first clamping device; the sorting module comprises a manipulator adjacent to the first clamping device and a second clamping device, and the second clamping device is connected to the hand portion of the manipulator; and the first clamping device, the rotating driving device, the camera shooting device, the manipulator and the second clamping device are all electrically connected with the controller module. The efficient and automatic detecting and sorting system for the cosmetic brushes is high in automation degree, can fast achieve detection on defective products of the cosmetic brushes, and can perform accurate sorting on the defective products, the production efficiency is improved easily, the manpower cost is reduced, and the sorting error rate caused by fatigue of an operator can also be avoided.

The invention discloses a full-automatic camshaft press-fitting machine. The full-automatic camshaft press-fitting machine comprises a stacking device used for tidying and guiding signal wheels, a feeding device used for feeding cams and a press-fitting device. The press-fitting device comprises a chuck structure, a lateral moving clamping plate assembly, a horizontal moving carrier and a first air cylinder, wherein the chuck structure is arranged in a suspended mode and used for clamping a camshaft, the lateral moving clamping plate assembly is arranged below the chuck structure, used for relatively clamping the camshaft and used for positioning the axis, the horizontal moving carrier is arranged below the lateral moving clamping plate assembly, the first air cylinder is arranged below the alignment chuck structure and used for jacking materials in the horizontal moving carrier to be connected to the camshaft in a sleeving mode, and a mechanical arm takes the materials in the stacking device or the feeding device into the horizontal moving carrier to be positioned. By means of the full-automatic camshaft press-fitting machine, a cam and the signal wheels are accurately pressed on the camshaft, and the pressing efficiency is improved.

The present disclosure relates to a rotation sensor for an injection device (1), the rotation sensor comprising: a rotatable element (201) configured for a mechanical engagement with a ratchet mechanism (90; 190), the rotatable element (201) comprising an outer rim (208) and a hub (210) is configured for transmission of a torque between the outer rim (208) and the hub (210), at least one sensor (220, 222, 224) attached to the rotatable element (201) and configured to measure at least one of a mechanical force, a mechanical pressure or a mechanical strain at a portion of the rotatable element (201) during a rotation of the rotatable element (201), a processor (112) connected to the at least one sensor (220, 222, 224) and configured to calculate an angle of rotation of the rotatable elementon the basis of a sensor output of the at least one sensor (220, 222, 224).

The invention discloses a preparation method of an electrostatic spinning membrane for tissue defect repair, which comprises the following steps: (i) continuously conveying a solution of a high polymer material through a first liquid supply pipe, and continuously conveying a cross-linking agent solution through a second liquid supply pipe; (ii) mixing the high polymer material solution conveyed from the downstream end of the first liquid supply pipe and the cross-linking agent solution conveyed from the downstream end of the second liquid supply pipe in real time in a main liquid supply pipe positioned at the downstream of the first liquid supply pipe and the second liquid supply pipe to form a spinning solution, and then the spinning solution is conveyed to a spinning electrode of electrostatic spinning equipment through the main liquid supply pipe for spinning, and the viscosity of the spinning solution is controlled according to a preset rule to form an electrostatic spinning film with the fiber diameter corresponding to the preset rule. According to the embodiment of the invention, the viscosity of the spinning solution gets rid of the dependence on the crosslinking reaction time and can be stably controlled.