32results 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 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).

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.

An anti-roll device for a vehicle may include a lower arm disposed at both sides of a sub-frame, a rotation mounter formed at a middle portion of the sub-frame, a spring unit of which the middle portion is rotatably disposed at the rotation mounter, and a push rod connected to both sides of the spring unit and the lower arm, wherein the spring unit includes a plate spring of which both end portions are bent in opposite directions, an engagement portion having an engagement hole in the middle portion thereof is formed, and a bolt hole is formed at both ends thereof, an assistant spring that is disposed at both sides of the engagement portion and an assemble hole is formed in the middle portion corresponding to the engagement hole, and an engagement yoke engaged with the plate spring and the assistant spring and disposed on the rotation mounter.

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 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 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 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.