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31results about How to "Improve bending deformation ability" patented technology

Three-dimensional orientation fibre-reinforced cement base composite material

InactiveCN101172824AImprove the effective coefficient of directionIncrease heightSolid waste managementSlagSuperplasticizer
The invention relates to three-dimensional oriented fibre reinforced cement base composite material which belongs to the field of concrete of building material. The composite material comprises gelled material, fine aggregate, water, three-dimensional oriented fibre and superplasticizer, wherein, the proportion by weight of the gelled material, the fine aggregate, the water and the superplasticizer is 1:(1 to 2.5):(0.13 to 0.35):(0.01 to 0.03). The gelled material component comprises cement and mineral additive, and the proportion by weight of the cement and the mineral additive is (0.4 to 0.9):(0.1 to 0.6), or the gelled material component comprises the cement , the mineral addition and expansion agent, the proportion by weight of the three is (0.35 to 0.85):(0.1 to 0.5):(0.05 to 0.15), the mineral additive is one of fly ash, slag, siliceous dust and metakaolin, the volume of the three-dimensional oriented fibre is 5 percent to 35 percent of the whole volume after all components are mixed, and the three-dimensional oriented fibre can choose a three-dimensional steel fibre net rack which is made of shortly-cut steel fibre and steel wires and a three-dimensional assorted fibre net rack which is made of steel wires and high performance organic base fibre. The invention ensures that the fibre is directionally arrayed at the high performance oriented fibre reinforced cement base composite material. Through utilizing the fly ash, the slag, the siliceous dust and the metakaolin as raw materials, the invention which can protect the environment and reduce the cost has the advantages of high strength, good toughness and high durability.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Frequency-adjustable stretchable liquid metal antenna and manufacture method thereof

The invention discloses a frequency-adjustable stretchable liquid metal antenna which comprises a stretchable base plate, wherein a curve-shaped liquid metal micro-flow way is machined on the stretchable base plate, and the liquid metal micro-flow way is internally filled with liquid metal or liquid metal alloy; when the stretchable base plate is transversely stretched, the liquid metal or the liquid metal alloy in the curve-shaped micro-flow way is lengthways and transversely deformed, and the length change of the stretched liquid metal antenna is controlled by presetting the proportional relation between the lengthways deformation and the transverse deformation, so that the work efficiency of the transversely-stretched liquid metal antenna can be adjusted. The invention further provides a manufacture method of the frequency-adjustable stretchable liquid metal antenna. According to the frequency-adjustable stretchable liquid metal antenna and the manufacture method of the liquid metal antenna, the length change of the stretched liquid metal antenna is controlled by presetting the proportional relation between the lengthways deformation and the transverse deformation, so that the work efficiency of the transversely-stretched liquid metal antenna can be adjusted.
Owner:HUAZHONG UNIV OF SCI & TECH

RFID (radio frequency identification) electronic tag based on fractal spring structure, radio frequency antenna based on fractal spring structure, and preparation method of RFID electronic tag

The invention discloses an RFID (radio frequency identification) electronic tag radio frequency antenna based on a planar fractal spring structure. The electronic tag radio frequency antenna is a closed coil formed by multiple coil sections, of a fractal spring structure, which are in sequential end-to-end connection. The invention further provides an RFID electronic tag based on the radio frequency antenna, the radio frequency antenna is attached to a substrate, the telescoping direction of a spring of each coil section is consistent with the stretching direction of the substrate at position of the coil section. The invention further provides a preparation method of the RFID electronic tag. Radio frequency antennas which are of a multi-level spring fractal structure and consistent with stretching direction of the substrate are disposed transversely and longitudinally on the substrate, large deformation redundancy is achieved, axial and transverse stretching and compression can be borne, large bending deformation capability is achieved, and accordingly the RFID electronic tag can be attached to object surfaces which may generate complex elastic deformation, such as human skin and clothes, and application range of RFID electronic tag is expanded.
Owner:HUAZHONG UNIV OF SCI & TECH

Multi-modal motion bionic inchworm crawling and climbing soft robot

The invention provides a multi-modal motion bionic inchworm crawling and climbing soft robot, which comprises feet and three deformable bodies sequentially connected between the two feet, and each deformable body is provided with an extensible face and a non-extensible face. The extensible faces are located on the opposite sides of the non-extensible faces so that the deformable bodies can deform between a linear structure and a C-shaped structure, and when the three deformable bodies are all in a linear structure, the direction of the non-extensible face of the middle deformable body is the same as the direction of the ground grabbing face of the foot, and the direction of the non-extensible face of the middle deformable body is opposite to the direction of the non-extensible faces of the deformable bodies located on the two sides, so that the deformable bodies can be matched with the feet in a flexible deformation mode to complete the horizontal crawling action and / or the climbing action. The multi-modal motion bionic inchworm crawling and climbing soft robot is simple in structure, light in mass and good in compliance, has the ability of multi-modal motion, adapts to motion in different environments and active conversion among the motions, and expands the motion adaptability of the soft robot in a complex environment.
Owner:SHANGHAI JIAO TONG UNIV

Steel plate and polyvinyl alcohol cement based composite antiknock board

The invention discloses a steel plate and polyvinyl alcohol cement based composite antiknock board which comprises two polyvinyl alcohol composite fillers, a foamed aluminum filler, two supporting plates, U-shaped-channel steel plates, high-strength bolts and steel cushion blocks. The foamed aluminum filler is arranged between the two polyvinyl alcohol composite fillers; the two supporting plates are inserted in channels of the U-shaped-channel steel plates to form a cavity in a surrounding way; the polyvinyl alcohol composite fillers, with the foamed aluminum filler between them, are arranged in the cavity; the supporting plates and the U-shaped channel steel plates are provided with bolt holes in symmetrical arrangement, and are connected to the polyvinyl alcohol composite fillers through the high-strength bolts; the steel cushion blocks are arranged between the U-shaped-channel steel plates and the high-strength bolts respectively. The steel plate and polyvinyl alcohol cement based composite antiknock board has the advantages of simple structure, light weight, high strength and high capacity of dissipating and absorbing explosion energy. To be specific, as the steel plates are used for making the cavity of the antiknock board, the antiknock board is simple in structure, is light, is not easy to fragment so as to effectively avoid secondary disasters caused by fragments, and accordingly is effectively applicable to buildings having requirements on explosion protection.
Owner:SHENYANG JIANZHU UNIVERSITY

RFID electronic tag, radio frequency antenna and preparation method based on fractal spring structure

The invention discloses an RFID (radio frequency identification) electronic tag radio frequency antenna based on a planar fractal spring structure. The electronic tag radio frequency antenna is a closed coil formed by multiple coil sections, of a fractal spring structure, which are in sequential end-to-end connection. The invention further provides an RFID electronic tag based on the radio frequency antenna, the radio frequency antenna is attached to a substrate, the telescoping direction of a spring of each coil section is consistent with the stretching direction of the substrate at position of the coil section. The invention further provides a preparation method of the RFID electronic tag. Radio frequency antennas which are of a multi-level spring fractal structure and consistent with stretching direction of the substrate are disposed transversely and longitudinally on the substrate, large deformation redundancy is achieved, axial and transverse stretching and compression can be borne, large bending deformation capability is achieved, and accordingly the RFID electronic tag can be attached to object surfaces which may generate complex elastic deformation, such as human skin and clothes, and application range of RFID electronic tag is expanded.
Owner:HUAZHONG UNIV OF SCI & TECH

Pipe material for preparing stent and its preparation method, stent and its preparation method

ActiveCN107693854BImprove mechanical propertiesEffective Radial Support ForceStentsSurgeryFiberFatigue fractures
The invention provides a pipe for preparing a stent and a preparation method thereof, a stent and a preparation method thereof. The outer layer of the pipe, the middle layer of the pipe and the inner layer of the pipe are sequentially arranged from outside to inside along the radial direction of the pipe, the outer layer of the pipe and the inner layer of the pipe are both composed of biodegradable polymers, and the middle layer of the pipe is composed of Woven from biodegradable fibers. The stent prepared from the tube of the present invention contains a biodegradable fiber braided structure, which can provide effective radial support force in large-diameter cavities, and the biodegradable fiber braided structure is wrapped in a degradable polymer, which can ensure The stent has good bending deformation properties, which enables the stent to be applied to various blood vessels, and reduces the risk of fatigue fracture caused by the expansion and contraction process of the stent after the stent is implanted in the blood vessel. Compared with the existing biodegradable polymer stent, the stent of the present invention has a thin wall, which facilitates the promotion of endothelialization and reduces the risk of thrombosis caused by stent implantation.
Owner:上海发微医用材料有限公司

A stretchable liquid metal antenna with adjustable frequency and its preparation method

The invention discloses a frequency-adjustable stretchable liquid metal antenna which comprises a stretchable base plate, wherein a curve-shaped liquid metal micro-flow way is machined on the stretchable base plate, and the liquid metal micro-flow way is internally filled with liquid metal or liquid metal alloy; when the stretchable base plate is transversely stretched, the liquid metal or the liquid metal alloy in the curve-shaped micro-flow way is lengthways and transversely deformed, and the length change of the stretched liquid metal antenna is controlled by presetting the proportional relation between the lengthways deformation and the transverse deformation, so that the work efficiency of the transversely-stretched liquid metal antenna can be adjusted. The invention further provides a manufacture method of the frequency-adjustable stretchable liquid metal antenna. According to the frequency-adjustable stretchable liquid metal antenna and the manufacture method of the liquid metal antenna, the length change of the stretched liquid metal antenna is controlled by presetting the proportional relation between the lengthways deformation and the transverse deformation, so that the work efficiency of the transversely-stretched liquid metal antenna can be adjusted.
Owner:HUAZHONG UNIV OF SCI & TECH

Adjustable oral cavity orthodontics mouth prop

The invention discloses an adjustable oral cavity orthodontics mouth prop, and particularly relates to the field of a mouth prop. The adjustable oral cavity orthodontics mouth prop comprises a supportring, wherein the support ring comprises two groups of opposite side connecting rings, two groups of opposite bottom connecting rings and a top connecting ring, wherein the two groups of the bottom connecting rings are fixedly arranged at one ends away from the top connecting ring, for the two groups of the side connecting rings, the top connecting ring is fixedly arranged at the top between thetwo groups of the side connecting rings, openings are formed in opposite sides of the two groups of the side connecting rings, an elastic sheet is fixedly arranged in each opening, and multiple groupsof the elastic sheets are arranged in the directions of the openings; and a penetrating hole is arranged in each elastic sheet, a flexible strip penetrates through the inner part of each penetratinghole, and two ends of each elastic strip are respectively and fixedly arranged at two ends of the inner part of each opening. The side connecting rings, the bottom connecting rings and an adjustment seat are arranged, so that the expanding degree can be adjusted according to the size of mouths of different patients, the bending deformation effect is good, the bending part is durable and not liableto crack, and the operation is simple and convenient.
Owner:NANJING MEDICAL UNIV

Production method of high-welding-performance expandable polystyrene (EPS)

The invention discloses a production method of high-welding-performance expandable polystyrene (EPS). The production method includes the steps of firstly, adding styrene, DCP, flame retardant, white oil and sodium dodecyl benzene sulfonate in a reaction kettle; secondly, sequentially adding purified water, trisodium phosphate, active calcium phosphate, emulsifier SDBS and anhydrous sodium sulfate; thirdly, adding a low-temperature initiator, a high-temperature initiator, other initiators and nucleating agent polyethylene wax; fourthly, feeding steam into the jacket of the reaction kettle to heat the materials in the reaction kettle from room temperature to 88-91 DEG C, and performing constant-temperature granulation; fifthly, adding calcium phosphate and ash calcium powder; sixthly, adding a foaming agent, and feeding steam into the jacket of the reaction kettle to perform slow temperature rising; seventhly, heating to 123-127 DEG C, and performing constant-temperature reaction for 4.5-5.5 hours; eighthly, cooling to 45-50 DEG C, and discharging. The production method has the advantages that boards or module products can be produced by using the flame-retardant EPS particles produced by the method as the raw material through pre-expansion and forming, good welding performance among the EPS resin particles is achieved, and product fracture and bending load performance and product bending deformation performance can be increased evidently.
Owner:安徽裕河新材料有限公司

A kind of multifunctional passive electronic skin system and preparation method thereof

The invention discloses a multifunctional wireless passive physiological health monitoring device, which includes a piezoelectric / thermoelectric blood pressure monitoring module, a thermocouple / thermoelectric body temperature measurement unit, an electrophysiological potential measurement module based on surface electrodes, and the like. The current modules use the principles of blood pressure flow, body temperature changes, and electrophysiological potential differences in biological tissues to directly convert blood pressure, temperature, and electrophysiological potential into voltage signals without an external power supply. The designed multifunctional wireless passive physiological health monitoring device has a certain stretching and deformation ability, actively adapts to the soft skin surface, and records the physiological health information of the human body (body temperature, blood pressure, electrocardiogram, electromyography, etc.) in real time. The invention also provides a method for processing and preparing a multifunctional wireless passive physiological health monitoring device, which has the characteristics of softness, light weight, long-term and stable recording of human physiological information, does not affect the daily behavior of the human body, and improves the comfort of the device and portability.
Owner:EAST CHINA JIAOTONG UNIVERSITY +1

Cast-in-place combined pavement slab for airport and preparation method

The invention discloses an airport cast-in-situ combined pavement slab and a preparation method. The pavement slab is composed of an upper layer, a lower layer and a middle layer, wherein the upper layer and the lower layer are made of engineering cement-based composite materials; the method has the advantages that the phenomenon of tensile cracking of the pavement slab can be reduced by utilizing the ultrahigh tensile toughness and micro-crack control capability of the ECC material, even if the pavement slab is cracked, the crack width is less than 100 microns, the material can work with cracks, and meanwhile, the cracks can be basically healed after three to four dry-wet cycles in an open-air environment. The ECC material has high bending deformation capacity, so that arching fracture damage of the airport pavement slab caused by temperature gradient can be avoided. In addition, the upper layer of the airport pavement slab is made of ECC materials, FOD can be reduced to a great extent, noise is lower when an airplane slides, and the environment for passengers is more comfortable. According to the airport combined pavement slab structural form adopted by the invention, the mechanical property of the ECC material can be fully utilized, and the manufacturing cost is greatly reduced.
Owner:CIVIL AVIATION UNIV OF CHINA
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