33results about How to "Improve load transfer efficiency" patented technology

The present invention relates generally to reinforced carbon nanotubes, and more particularly to reinforced carbon nanotubes having a plurality of microparticulate carbide or oxide materials formed substantially on the surface of such reinforced carbon nanotubes composite materials. In particular, the present invention provides reinforced carbon nanotubes (CNTs) having a plurality of boron carbide nanolumps formed substantially on a surface of the reinforced CNTs that provide a reinforcing effect on CNTs, enabling their use as effective reinforcing fillers for matrix materials to give high-strength composites. The present invention also provides methods for producing such carbide reinforced CNTs.

The present invention relates generally to reinforced carbon nanotubes, and more particularly to reinforced carbon nanotubes having a plurality of microparticulate carbide or oxide materials formed substantially on the surface of such reinforced carbon nanotubes composite materials. In particular, the present invention provides reinforced carbon nanotubes (CNTs) having a plurality of boron carbide nanolumps formed substantially on a surface of the reinforced CNTs to reinforce the CNTs, enabling their use as effective reinforcing fillers for matrix materials to give high-strength composites. The present invention also provides methods for producing carbide reinforced CNTs.

The invention relates to a body structure of a vehicle. A hinge reinforcement is arranged at a hinge pillar at a specified position which corresponds to an upper door-hinge attachment portion. Attachment portions which extend toward a hinge pillar inner and are attached to this hinge pillar inner are arranged at the hinge reinforcement which corresponds to the upper door-hinge attachment portion. A branch frame and a gusset member which transmit an impact load inputted from a front side frame extending in a vehicle longitudinal direction to the attachment portions via the hinge pillar inner are provided so as to extend from the front side frame. Accordingly, the impact load inputted to the vehicle body at the vehicle collision can be properly transmitted to the vehicle rear portion, so that the deformation of the vehicle compartment can be restrained surely.

The invention discloses a preparation method of aramid nanofiber-based composite aerogel, which comprises the following steps: preparing an aramid nanofiber suspension; mixing the aramid nanofiber suspension with a polymer solution to obtain mixed slurry, wherein the polymer solution is one of a polyvinyl alcohol solution, a starch solution, a chitosan solution and a sodium alginate solution; and carrying out freeze drying treatment on the mixed slurry to obtain the aramid nanofiber-based composite aerogel. According to the invention, an aramid nanofiber suspension and a polymer solution are mixed to form a strong intermolecular hydrogen-bond interaction in chemical bonding; the aramid nanofibers with high length-diameter ratio and polymer molecules are intertwined to form a cross-linked network structure, the micro-pore structure of the aramid nanofiber-based aerogel is regulated and controlled, the aramid nanofibers give full play to bridging connection of the micro-structure of the fibers, the aerogel material of a honeycomb ordered structure is prepared, and the aerogel material has the advantages of low heat conductivity coefficient, and better compression cyclicity and mechanical property.

A first load-receiving member having a cylinder and a screw hole through which a bolt is thread-engaged and a second load-receiving member having a piston and a fastening face that is made in contact with a member to be fastened are attached to a nut, and a number of balls made of steel the surface of which is lubricated by grease are loaded into a pressure chamber that is formed as a compartment by the cylinder and the piston. Since these balls exert fluidity in the pressure chamber, a load applied to the balls is transmitted to the cylinder and the piston through the balls by screwing the input bolt. Thus, the first load-receiving member is moved in the axis direction with respect to the second load-receiving member, thereby applying a tensile force to the bolt.

A structure for the front of a vehicle body comprises front side frames (16). The front side frames (16) have bend portions (29) in the rear portion thereof, said bend portions (29) sloping downwards along a dashboard lower panel (21) as the front side frames (16) extend towards the back of the vehicle body. Side sill-side extensions (45) curve to the side of side sills (23) from the end parts (29a) of the bend portions (29). Curving tunnel-side extensions (46) curve towards a tunnel portion (24). The side sill-side extensions (45) and the tunnel-side extensions (46) form branched portions (48) branching at substantially the same angle. Triangular load support portions (49) are formed at the back of the branched portions (48) between the side sill-side extensions (45) and the tunnel-side extensions (46). Rear end support portions (59) for supporting the rear ends (18b) of sub frames (18) are provided to the bend portions (29) and the fronts of the load support portions (49).

The present disclosure presents a vehicle framework structure, which comprises: a front frame that configures a part of a framework of a vehicle front section; a rear frame that configures a part of a framework of a vehicle rear section; an intermediate frame that configures a part of a framework of a vehicle intermediate section, and that includes a framework member disposed between the front frame and the rear frame and having a length direction in a vehicle front-rear direction; and a coupling section that includes a first configuration member attached to the framework member of the intermediate frame so as to be continuous with the framework member in the vehicle front-rear direction, and a second configuration member attached to the first configuration member so as to be continuous with the first configuration member in the vehicle front-rear direction.

A vehicle seat comprises an outer frame disposed to laterally outside of the vehicle, a seatback frame having an inner frame disposed to laterally inside of the vehicle, an impact-transmitting block capable of transmitting impacts from outside of the vehicle caused by a collision to the seatback frame. The vehicle seat further includes a projection projecting laterally outward of the vehicle from a side of the outer frame. The projection is secured in an aperture provided on the impact-transmitting block.

The invention relates to a preparation method for improving the mechanical property of an aluminum-based composite through synergistic reinforcement of a carbon nanotube and graphene. The preparationmethod comprises the following steps that a carbon nanotube-graphene composite reinforced phase is prepared, specifically, sucrose serving as a carbon source, nickel powder serving as a template and pluronic F127 serving as a dispersant are dissolved in deionized water together with the carbon nanotube to be fully stirred, and a mixed solution is obtained; the mixing solution is heated while beingstirred, thus the water is fully evaporated, and mixed powder is obtained; the obtained mixed powder is placed in an ark, and then the ark is placed in a constant temperature area of a high-temperature tubular furnace for a chemical vapor deposition reaction; a reaction product is placed in a ferric chloride corrosive solution to be fully corroded; and the carbon nanotube-graphene reinforced aluminum-based composite is formed.

Provided are a vehicle body front portion structure that enables an increase in vehicle body rigidity and strength while suppressing an increase in weight and a decrease in layout freedom, and a vehicle body assembly method. A vehicle body front portion structure (1) is provided with: a first weld portion (11) where a shield lower flange (4a) of a windshield lower member (4) is abutted on a closed cross section of a front pillar (2), and where the shield lower flange (4a), an inner front flange (21a), and a rear end portion (5a) are spot-welded; and a second weld portion (12) where a general portion (5b) of a side member (5), a stiffener front flange (22a), and an outer front flange (3a) are spot-welded at a position forwardly of the first weld portion (11).

The invention discloses a preparation method of ceramic matrix composite bolts and pins based on a long-rod-shaped prefabricated body structure, wherein the method is used for solving the problem of non-uniform bearing of 2D and 3DN bolt thread teeth. The method comprises the steps: firstly, designing a fiber prefabricated body into a core body structure formed by bundling unidirectional fibers and a cladding structure formed by weaving fiber bundles; and then determining the number of the fiber bundles of a cladding and a core body, uniformly distributing the unidirectional fiber bundles to form a bundling structure, and binding the bundling structure in the spiral direction by adopting fused glass fibers; then weaving a fiber bundle cladding on the surface of the core body by adopting a weaving method, so as to enable the core body unidirectional fiber bundle prefabricated body to be subjected to compressive stress; sewing the core body and the cladding prefabricated body by adopting the fine fused glass fibers to form a rod-shaped prefabricated body; preparing an interface phase and a ceramic matrix; and finally, processing high-precision threads in a cladding area, preparing a protective coating layer, and thus obtaining a target product. The method is suitable for large-scale low-cost production of the ceramic matrix composite material bolts.

The invention discloses a preparation method of a cracking carbon nanotube strengthened copper-based composite material. The preparation method comprises the following steps: dispersing carbon nanotubes into concentrated sulfuric acid, then adding concentrated phosphoric acid and potassium permanganate for magnetic stirring, cooling to room temperature after heating for heat preservation, then adding deionized water containing hydrogen peroxide in an ice-bath condition, obtaining a cracking carbon nanotube after cleaning, preparing the obtained cracking carbon nanotube and copper acetate intoa precursor in a solution, dropwise adding glucose and hydrazine hydrate under magnetic stirring, carrying out suction filtration, drying and annealing treatment to obtain composite powder, preparingthe composite powder into a block material through SPS sintering, and then obtaining the cracking carbon nanotube strengthened copper-based composite material through heat extrusion and annealing treatment. According to the preparation method, oxidative cracking treatment is carried out on the carbon nanotubes, the length-width ratio controllable cracking carbon nanotube is obtained, and the plasticity of the material can be considered while the strength of the composite material is improved, so that the composite material has good comprehensive mechanical property.

The invention discloses a combined connecting structure of a reinforced composite material and a metal material. The combined connecting structure of the reinforced composite material and the metal material comprises two reinforced composite material components, a metal material component and a plurality of externally-arranged connecting bolts, wherein the two reinforced composite material components are symmetrically arranged left and right, and the metal material component is arranged between the two reinforced composite material components in a matched mode. According to the combined connection structure of the reinforced composite material and the metal material, the problem of connection reliability between the composite material and a metal framework can be effectively solved, the transfer efficiency of loads between structures of different materials is improved, the coordination of deformation is ensured, and therefore the overall safety of the combined connection structure is improved.

The invention relates to a cabin door assembly of an aircraft main undercarriage cabin, and the cabin door assembly comprises a cabin door panel which comprises a cabin door skin and a cabin door reinforcing rib, and the cabin door reinforcing rib is arranged on the side, facing the main undercarriage cabin, of the cabin door skin; the driving rocker arm is connected with the first side of the cabin door panel so that the cabin door panel can rotate around the pivot axis, the driving rocker arm is provided with a first connecting end and a second connecting end, and the first connecting end is fixedly connected to a cabin door reinforcing rib of the cabin door panel.

The invention provides a light prefabricated stair which is light in weight and good in strength. The light prefabricated stair comprises a concrete stair body and a plate-type combined framework arranged in the concrete stair body; the concrete stair body is formed by pouring foamed concrete; the plate-type combined framework comprises a bottom plate, a plurality of supporting plates and a plurality of connecting plates; the multiple supporting plates are continuously arranged on the surface of the bottom plate in the length direction of the bottom plate; the multiple supporting plates are arranged on the surface of the bottom plate at intervals in the width direction of the bottom plate; the multiple connecting plates are arranged at intervals in the length direction of the bottom plate and intersect with the multiple supporting plates; and a plurality of evenly-distributed unit holes are formed in the surface of each supporting plate and the surface of each connecting plate. According to the light prefabricated stair, each step plate part on the concrete stair body is effectively supported through the plate-type combined framework, so that the situation that the compressive strength, the bending strength and the impact strength are reduced due to the fact that no framework support exists in step plates poured only by foamed concrete is avoided.

The invention discloses a highly oriented carbon nanotube film or fiber and a preparation device and method thereof by a micro-comb method. In one embodiment, the preparation method includes: providing a carbon nanotube array, and pulling out a single-layer carbon nanotube film from the carbon nanotube array; The single-layer carbon nanotube film is micro-combed, so that the orientation of the carbon nanotubes in the single-layer carbon nanotube film is basically consistent; And form highly oriented carbon nanotube film or carbon nanotube fiber. By means of the invention, the structure of the carbon nanotube fiber and film can be made denser, and the load transfer efficiency and mechanical performance thereof can be greatly improved. At the same time, the invention also successfully realizes the transformation of the carbon nanotube material from a microscopic body to a macroscopic body, increases its macroscopic operability, and facilitates subsequent treatment and processing.

The invention belongs to the field of aero-engine structural design and strength analysis, and relates to a composite material closed annular casing layering design structure which comprises a barrel, a transition area, a thickening area, an R area and a flanging which are sequentially connected, the barrel, the transition area, the thickening area, the R area and the flanging are all integrally arranged, that is, continuous layering is generally carried out on a casing from the barrel to the flanging, and the thickness of the casing is larger than that of the barrel. A metal mounting edge and a rivet connecting structure thereof are omitted, so that the load transmission efficiency of the cartridge receiver is improved; the problem that thermal deformation of different materials in the casing in the working state is not coordinated is solved; the layer thickness of the turnup is the same as that of the thickening area, the layer between the thickening area and the transition area is gradually decreased from the thickening area to the transition area in a stepped mode, and the layer between the transition area and the barrel is gradually decreased from the transition area to the barrel in a stepped mode, so that the thickened layer state extends to the cartridge receiver barrel. According to the layering design method, the weight reduction design requirement of engine parts is considered while the strength requirement of each part of the case is ensured, and the number of layering layers is minimized.

The invention discloses a rod-shaped preform with a high length-diameter ratio and a preparation method of the rod-shaped preform, and solves the problem of non-uniform distribution of fiber reinforcements in thread teeth of a ceramic matrix composite bolt based on an existing preform. The preparation method comprises the steps of firstly, designing a fiber preform into a core structure and a cladding structure; and then determining the number of fiber bundles of the cladding and the core, uniformly distributing the unidirectional fiber bundles to form a bundle structure, and binding the bundle structure by adopting fused glass fibers in the spiral direction to form a unidirectional fiber bundle core structure; then weaving a fiber bundle cladding on the surface of the core body by adopting a weaving method so as to enable the core body unidirectional fiber bundle preform to be subjected to the pressure stress of the cladding woven preform; and finally, sewing the core body and the cladding preform by using the fine molten glass fibers to form a rod-shaped preform. According to the prepared novel rod-shaped preform structure with the high length-diameter ratio, uniform distribution of fiber reinforcements in the thread teeth can be achieved, the cladding thread teeth can have more excellent obdurability, and the fiber obdurability of the core body unidirectional fiber bundles can be fully exerted.

The high-bearing-capacity pavement structure comprises a graded broken stone layer, a mortar layer is laid on the graded broken stone layer, a bonding layer is laid on the mortar layer, and an asphalt concrete overlay layer is laid on the bonding layer; a reinforcement cage is arranged in the bonding layer, outer ribs are arranged on the upper side and the lower side of the reinforcement cage, and the outer ribs extend into the mortar layer and the asphalt concrete overlay layer. The paving construction method of the high-bearing-capacity pavement structure comprises the following steps: 1) leveling a site and erecting a template; (2) paving a large-particle-size gravel layer; (3) paving a small-particle-size gravel layer; (4) rolling to form a graded broken stone layer; the construction method comprises the following steps of (1) paving cement mortar to form a gravel grouting layer, (2) mounting a reinforcement cage, (3) paving a bonding layer, (4) paving a bonding layer, and (5) paving cement mortar to form a gravel grouting layer, (6) mounting a reinforcement cage, (7) paving a mortar layer, (8) paving a bonding layer, and (9) paving an asphalt concrete overlay layer.By adopting the structure and the method, the pavement structure is optimized, the stability between layers of pavements is enhanced, the slippage risk of the pavement is reduced, and reliable environmental conditions are provided for normal operation of roads.

The invention discloses interface modified chlorinated polyethylene rubber based on a novel reinforcing agent and a preparation method thereof. The interface modified chlorinated polyethylene rubber comprises the following raw materials in parts by weight: 80 parts of chlorinated polyethylene, 10 parts of the reinforcing agent, 5 parts of a coupling agent, 25 parts of a flame retardant, 10 parts of a stabilizer, 2 parts of an auxiliary stabilizer, 1.5 parts of a lubricant, 6 parts of a halogen-free plasticizer, 3 parts of a vulcanizing agent and 2 parts of a vulcanizing aid. The reinforcing agent is a nano-filler, the nano-filler is a boron carbide nanowire, and the boron carbide nanowire is obtained by heating a mixture of a carbon nanotube and boron powder by taking the carbon nanotube as a template; wherein the coupling agent is graphene, and the graphene is a high-quality graphene sheet and is directly prepared from graphite; and the stabilizer is a combination of magnesium oxide,stabilizer zinc glyceroxide and stabilizer magnesium stearate. The base material, the coupling agent, the reinforcing agent and the stabilizer are safe and environment-friendly, do not contain substances which cause great damage to the environment, and follow the development trend of green chemistry.

The invention provides a novel tongue-and-groove assembly type pavement slab and a maintenance and replacement method of a assembly type pavement slab, the load transfer advantage of tongue-and-groove tenon-and-mortise joints can be fully played, and meanwhile rapid replacement and maintenance of the tongue-and-groove assembly type pavement slab can be achieved. The slab comprises rectangular plate bodies which are spliced to form a pavement, dowel bars are embedded in the two side walls of the rectangular plate bodies in the length direction at intervals in the width direction, the dowel bars of every two adjacent rectangular plate bodies in the length direction are correspondingly welded and connected, and splicing of the rectangular plate bodies in the transverse direction of the pavement is achieved; a connecting tenon and a connecting groove which correspond to each other are respectively arranged on the left side wall and the right side wall in the width direction of each rectangular plate body, and the connecting tenons are clamped into the connecting grooves of the rectangular plate bodies, so that the two adjacent rectangular plate bodies are longitudinally assembled on the pavement; or connecting grooves are formed in the left side wall and the right side wall of each rectangular plate body in the width direction, and a grouting connecting cavity formed by the corresponding connecting grooves of every two adjacent rectangular plate bodies is filled with a crack pouring material to form a high-strength clamping tenon, so that the two adjacent rectangular plate bodies are spliced in the longitudinal direction of the pavement.