23results about How to "Improved deformation coordination" patented technology

The invention belongs to the technical field of three-dimensional micro-nano manufacturing and sensing, and discloses a self-curling spiral strain sensor and a preparation method thereof, and the method comprises the steps: preparing a patterned graphene conductive film in situ on a top-layer high-molecular polymer film of a flexible film substrate through a laser processing mode; cutting the flexible thin film substrate with the graphene conductive thin film into strip-shaped structures; the swelling effect of the bottom-layer high-molecular polymer film of the flexible film substrate is greater than that of the top-layer high-molecular polymer film, so that the strip-shaped flexible film substrate is subjected to swelling deformation in a solvent, and the self-curling spiral strain sensor can be obtained. The preparation of the flexible spiral structure is realized by utilizing a swelling mechanism, the in-situ preparation of the graphene conductive film is realized by adopting a laser-induced graphene processing mode, the preparation of a multi-level spiral functional structure can be realized by adjusting characteristic parameters, and strain sensors with different sensitivities and working ranges are obtained.

The invention discloses a 1500MPa-grade ultrahigh-strength titanium alloy fastener which is obtained by sequentially performing heat treatment, head upsetting and thread rolling forming on ultrahigh-strength titanium alloy, and the ultrahigh-strength titanium alloy comprises the following elements in percentage by mass: 5-6% of Al, 3-4% of Mo, 3-4% of V, 5-6% of Cr, 1-2% of Nb, 2-3% of Zr, not more than 0.5% of Fe and the balance of Ti and inevitable impurities. According to the titanium alloy fastener, it can be guaranteed that the titanium alloy obtains high strength by adding the high Cr element, meanwhile, the machinability of the titanium alloy material is improved by adding the proper content of Mo and Nb elements, forming of the ultrahigh-strength titanium alloy fastener is facilitated, and the titanium alloy fastener is suitable for the technical field of titanium alloy fasteners.

The invention discloses an additive forging composite forming method for integrally loading local deformation on an aluminum alloy lightweight wheel-shaped component, and relates to an additive forging composite forming method for a wheel-shaped component. The problems that an existing spaceflight aluminum alloy light-weight wheel-shaped component is poor in direct additive forming structure performance, a forging forming die is difficult to fill, the forging process is long, and the die cost is high are solved. The method comprises the following steps: 1, performing additive forming on a main blank; 2, pre-forging and forming the spoke; 3, machining and finishing the pre-forged piece; fourthly, secondary material adding is conducted on the rim; 5, carrying out homogenization heat treatment on the whole wheel; 6, integrally forging and forming the wheel; and 7, wheel direct aging strengthening treatment. The method is used for additive forging composite forming of the aluminum alloy light-weight wheel-shaped component subjected to overall loading and local deformation.

The invention discloses an assembly type FRP profile-concrete continuous composite beam which is mainly composed of an FRP profile main beam, a sagging moment area prefabricated concrete slab and a hogging moment area prefabricated laminated slab. Wherein the upper part of the hogging moment area prefabricated laminated plate is a large-strain FRP grid reinforced EGC top plate, the lower part of the hogging moment area prefabricated laminated plate is an FRP rib reinforced concrete bottom plate, and shear-resistant short steel bars are vertically arranged on the two; the beam sections of the FRP profile main beam are connected through FRP lap joint plates, U-shaped formwork-free comb-tooth-shaped wet joints are arranged between the plates, and the FRP profile main beam is connected with the upper prefabricated concrete slab and the laminated slab through detachable high-strength bolts. According to the structure, the characteristics of ultrahigh ductility, multi-seam steady-state cracking and higher tensile strength of a large-strain FRP grid reinforced EGC material are fully utilized, and meanwhile, the advantages of light dead weight, high strength and high elasticity of an FRP profile and the advantages of large rigidity, good stability, low construction cost and the like of a concrete wing plate are exerted; and the reliable and durable assembly type functional gradient composite beam is formed.

The present invention discloses a connection structure of a prefabricated wall panel and an assembled steel frame structure beam and a construction method thereof, comprising a steel frame, a prefabricated wall panel and a connection device. The connection device comprises a slide groove and a wall panel connection piece. The slide groove is welded to the two ends of the lower flange of the upper beam and the upper flange of the lower beam respectively, so that the wall panel connection piece slides into the slide groove to achieve rapid positioning and fixing; the wall panel connection piece is L-shaped, and the connection piece and the wall panel are bolted in the factory, and the connection piece and the frame beam are connected by double-row bolts after alignment at the construction site. The present invention is simple to construct, and the bolt connection is convenient and fast, and the construction speed is improved. It can adapt to the development of assembled steel structures and is easy to install and dismantle. The double-row bolt connection is adopted to ensure that the steel beam has a high overall stability and bearing capacity, and at the same time, the deformation coordination between the steel frame and the prefabricated wall panel is better.

According to the high-strength aluminum-magnesium layered composite material and the preparation method thereof, an aluminum alloy plate and a magnesium alloy plate are selected, a multi-pass stirring friction machining and cold rolling combined technology is adopted, and hard and brittle intermetallic compounds generated in the stirring friction machining stage are crushed through cold rolling, so that the interface bonding area is increased; and the composite material keeps good coordination in the deformation process, each layer is continuous, the plasticity loss of the composite material in the preparation process is reduced, and the high-performance aluminum-magnesium layered composite material is obtained. The shear strength of the composite material is greatly improved, and the maximum shear strength can reach 146 MPa; the tensile strength of the composite material is greatly improved, and the elongation rate of 13.4% can be kept while the tensile strength reaches 303 MPa; the whole process method can be used for large-area production, is suitable for industrial production, and reduces the production cost.

The application discloses an economical boron-containing stainless steel for hot neutron absorption, which comprises the following steps: (1) component design; (2) smelting molten steel according to the set component in a vacuum environment, applying electromagnetic stirring in a smelting process, and carrying out casting under a nitrogen protection atmosphere to obtain a casting blank; (3) homogenizing heat treatment of the casting blank for 240-720 min between Ac3 and the melting point of boride (T f ); air cooling to room temperature after discharging; (4) after removing casting defects, inclusions and slag foreign matters by grinding the casting blank after heat treatment, carrying out hot deformation and solid solution treatment; the hot deformation heating temperature and the solid solution treatment temperature are respectively T f 10-80 DEG C and 30-100 DEG C. The application is aimed at the characteristics of high cost and poor hot plasticity of the traditional boron-containing stainless steel for hot neutron absorption, reduces the use of precious metal Ni, improves the hardness of the matrix structure, enhances the deformation coordination of the matrix and boride, greatly improves the hot plasticity, and improves the hot deformation capacity of the material.

The invention discloses a method for arranging a dam crest formwork increasing area on a core-wall rockfill dam to control water storage cracking and an earthquake response whip effect, a formwork increasing rockfill area is arranged at the position 1 / 3-1 / 5 of the dam height below the dam crest, the filling standard is controlled by adopting double indexes of porosity and relative density, it is guaranteed that the formwork increasing rockfill area reaches the full compaction degree, and the dam crest formwork increasing area is arranged at the position 1 / 3-1 / 5 of the dam height. The crack of the core-wall rock-fill dam is controlled, the whip effect of earthquake response of the rock-fill dam is effectively reduced, and the method for controlling the crack of the dam and improving the anti-seismic safety performance is expected to be achieved.

The invention belongs to the field of material science and engineering, and particularly relates to a magnesium alloy with high strength and plasticity and high creep property in a wide temperature range and a preparation method. According to the method, the requirements of the magnesium alloy for high-strength plasticity and high creep property in a wide temperature range of-180 DEG C to 200 DEG C can be met; the magnesium alloy prepared by the method comprises a multi-scale mixed crystal structure of micron grains and stable ultra-fine grains; the material provided by the method (in a stress interval within 200MPa and a temperature interval below 200DEG C) shows creep resistance far higher than that of magnesium alloys in a common as-cast state, a heat treatment state and a common deformation treatment state, so that the application of the magnesium alloy in a creep-resistant structural member is expanded, and the creep-resistant performance of the magnesium alloy is improved. And meanwhile, the instant mechanical properties at room low temperature (-180 DEG C to room temperature) show good strength and plasticity.

This application provides a roadbed construction method applicable to existing highway widening and reconstruction projects, relating to the field of highway widening and reconstruction. It includes: stepped excavation treatment: excavating in stages along the widening side of the existing roadbed to form a stepped connection zone, and laying an interface geogrid on the stepped surface; layered reverse-wrapping reinforced filling: compacting the fill material, folding the interface geogrid back into the fill body to form an inner reverse-wrapping reinforced fill body; assembling the outer segmented wall: hoisting and vertically splicing the prefabricated outer segmented wall; laying a composite drainage system; assembling the top capping components; installing the top tension restraint structure: laying a top tension geogrid, connecting the two ends to the outer segmented wall via adjustable connecting components; pre-tensioning and locking the top tension geogrid, pouring and shaping the top surface of the roadbed, connecting to the existing pavement, and removing construction auxiliary components to complete the construction. This application has the effect of reducing the risk of differential settlement and shear slippage.

The invention relates to the technical field of computer aided design, and discloses an FPC wiring design optimization method and system based on big data, and the method comprises the steps: obtaining the geometric features of a to-be-designed FPC wiring region and an associated historical wiring database, generating a node probability weight field representing the corresponding relation between the wiring node probability and the passing rate, coordinate numerical perturbation is applied to a flexible transition area to determine an impedance sensitivity coefficient, then a node probability weight field is corrected, a wiring forbidding constraint is established, and finally a wiring topology scheme is determined based on an optimization gradient. The impedance mismatching risk caused by manufacturing tolerance is avoided, the distribution relation between the wiring track and the bending stress is coordinated, and the signal integrity of the flexible circuit board under the complex working condition is improved.

This application provides a heat-absorbing tower structure system for a tower-type solar thermal power plant, including a heat absorber, a concrete cylinder, a vertical cylinder, a steel frame, a reinforcing mechanism, a first connecting mechanism, and a second connecting mechanism. The vertical cylinder is located within the cavity of the concrete cylinder and partially extends out of the concrete cylinder. The steel frame is positioned above the concrete cylinder and surrounds the outside of the vertical cylinder, and the heat absorber is located within the steel frame. The reinforcing mechanism connects the concrete cylinder and the steel frame to restrict the movement of the steel frame relative to the concrete cylinder, achieving vertical conversion of the steel-concrete structure. The first connecting mechanism fixes the concrete cylinder and the vertical cylinder to form a rigid horizontal connection for the lower tower body. The second connecting mechanism connects the steel frame and the vertical cylinder, allowing for relative horizontal displacement within a preset range. This heat-absorbing tower structure system has high stress coordination and deformation compatibility, can reduce construction costs, and meets the requirements of high reliability, lightweight, and stable support for the heat-absorbing tower of a tower-type solar thermal power plant.

The invention discloses a tunnel surrounding rock large-deformation yielding supporting structure combined with damping energy dissipation. The tunnel surrounding rock large-deformation yielding supporting structure sequentially comprises a primary support, a honeycomb aluminum yielding supporting layer, a rubber damping layer, a secondary lining and steel bar anchors from outside to inside. The honeycomb aluminum yielding supporting layer is composed of an aluminum plate and a honeycomb aluminum component, and honeycomb aluminum holes in the honeycomb aluminum component vertically face the inner contour line of the tunnel. The honeycomb aluminum yielding supporting layer bears surrounding rock pressure, meanwhile, deformation is expanded and transmitted to the rubber damping layer, and the material energy consumption of the rubber damping layer is increased; the rubber damping layer absorbs and dissipates energy and also has a tunnel waterproof effect; the rubber damping layer and the honeycomb aluminum yielding supporting layer are fixed to the primary support through the steel bar anchor nails, and then a secondary lining is constructed. The tunnel yielding supporting structure has the advantages that the honeycomb aluminum yielding supporting layer can enhance the tunnel supporting capacity, deformation is expanded and transmitted to the rubber damping layer, and the rubber damping layer absorbs and dissipates energy, so that the deformation coordination capacity of the tunnel yielding supporting structure is enhanced, secondary lining concrete is prevented from cracking, and the safety of the tunnel yielding supporting structure is guaranteed.

The invention discloses a high-strength and tough zinc alloy with prefabricated quasi-microcrack petal-shaped tough second phase and its preparation method and application, belonging to the technical field of zinc alloy material processing. The high-strength and tough zinc alloy microstructure contains 3-10% volume fraction and 5-40μm average size distribution of prefabricated quasi-microcrack petal-shaped GdZn 12 Phase or NdZn 11 The second phase, or a mixture of two second phases, has an average grain size of 0.5 to 1.2 μm in the matrix grains of the alloy. The degradable zinc alloy of the present invention has both high strength and high toughness. The present invention utilizes the good toughness and deformation coordination ability of the petal-shaped second phase to prevent cracks from initiating at the interface between the second phase and the matrix. At the same time, the petal-shaped second phase can improve the energy absorption capacity by generating cracks by itself, that is, improve the strength and toughness of the zinc alloy.

The invention provides a high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy and a preparation method and application of the high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy, and in the high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy, the element Ce accounts for 5.0-7.0 wt.%; the content of the element Ni is 0.01 to 2.5 weight percent; the percentage by weight of the element Fe is 0.20 to 0.50 percent; the content of TiB2 is 0.01 to 2.1 wt.%; and the balance of Al. The TiB2 exists in the form of ceramic particles. The invention further discloses a preparation method of the TiB2 / Al-Ce-Ni-Fe alloy. The thermal conductivity of the TiB2 / Al-Ce-Ni-Fe alloy ranges from 186 W / (m.K) to 200 W / (m.K), the requirement for high thermal conductivity of aluminum alloy needed in the heat dissipation field can be met, and the TiB2 / Al-Ce-Ni-Fe alloy has very good application prospects and large-scale popularization potential in the heat dissipation fields of communication base stations, micro-channel radiators and the like.

The invention belongs to the technical field of laminated composite materials, and particularly relates to a Ti3Al-TiAl laminated composite material and a preparation method and application thereof. According to the method, the forged Ti3Al alloy and the forged TiAl alloy serve as raw materials, the Ti3Al-TiAl laminated composite material is prepared through the vacuum hot pressing and sheath hot rolling method, the room-temperature ductility and toughness of the composite material are improved, the high high-temperature performance (yield strength and tensile strength) of the composite material is kept, the size of the obtained Ti3Al-TiAl laminated composite material is (200-1000) mm * (80-500) mm * (1-5) mm, the room-temperature tensile strength reaches 900-1100 MPa, and the tensile strength of the obtained Ti3Al-TiAl laminated composite material reaches 90-100 MPa. The room temperature plasticity is 3%-6%, the fracture toughness is 35 MPa.m < 1 / 2 >-50 MPa.m < 1 / 2 >, the tensile strength at 800 DEG C can reach 650-800 MPa, the yield strength at 800 DEG C can reach 600-700 MPa, and the plasticity at 800 DEG C is 20%-30%. And the large-size and large-batch production requirements are met, and good application prospects are achieved.

This utility model discloses a tunnel arch structure, which includes a top arch plate, supporting arch plates on both sides of the top arch plate, connecting components at both ends of the top of the supporting arch plates, reinforcing components on the side walls of the two supporting arch plates, arch foot plates at the bottom of the two supporting arch plates, and multiple mounting holes on the top of the two arch foot plates. This tunnel arch structure utilizes an external hydraulic torque wrench to drive a screw rod to rotate, causing a locking block to be inserted into a slot and moved for engagement, resulting in tighter assembly and preventing misalignment. The connection between the top arch plate and the supporting arch plates is more stable, improving the support effect of the tunnel arch. Furthermore, by inserting an anchor pipe into the soil layer through a positioning sleeve and injecting cement mortar that flows out from the grout outlet, installation stability is improved. A rubber sleeve prevents backflow of soil and rock from affecting use. The arch structure has better deformation coordination with the surrounding rock, and the installation of the supporting arch plates on the tunnel wall is more stable.

The present invention relates to a semiconductor structure and a method for forming the same. A transition layer is formed between a tungsten layer and a pad metal layer, the transition layer is attached to the upper surface of the tungsten layer, and the pad metal layer is attached to the upper surface of the transition layer. The transition layer plays a transition role between the tungsten layer and the pad metal layer, can reduce the influence of the rough tungsten layer surface on the morphology of the pad metal layer, optimize the surface morphology of the pad metal layer located on the tungsten layer, help reduce the difficulty of the subsequent sealing and testing process, and improve the accuracy of sealing and testing.

The dam comprises a dam body, the top of the dam body is provided with a water retaining body extending in the transverse direction, the water retaining body is provided with a drainage hole with a valve, the downstream of the dam body is provided with lateral drainage ditches located on the two sides of the dam face, and the lateral drainage ditches are arranged in the dam face. A flexible energy dissipation layer is arranged on the dam face between the lateral drainage ditches, a longitudinal drainage ditch located in the center of the dam face and a net-shaped drainage ditch distributed along the dam face are arranged on the flexible energy dissipation layer, and the bottom outlet ends of the longitudinal drainage ditch, the net-shaped drainage ditch and the lateral drainage ditches are all connected with a stilling pool. According to the method, by comprehensively applying the modes of combining the characteristics of protective structure materials, the energy dissipation principle, the overtopping flood discharge capacity of the earth and rockfill dam and the like, the deformation coordination between the structure materials is improved, and meanwhile safety protection and safety operation of overtopping but not collapsing or overtopping and slow collapsing of small and medium-sized reservoir dam bodies are guaranteed.

The invention provides a rigid-flexible combined reinforcing method for controlling earthquake deformation of a dam foundation of a concrete faced rockfill dam on a deep and thick covering layer, and belongs to the technical field of water conservancy projects. Comprising the steps that (1) concrete piles and gravel piles are arranged in a covering layer to form a composite foundation system, the concrete piles provide rigid vertical support, and the gravel piles improve the drainage performance of a foundation and reduce the liquefaction risk; (2) geogrids are laid in a layered mode, the upstream sides and the downstream sides of the geogrids are turned up to the slope surface to form wrapping sections, flexible horizontal constraint is formed, and the deformation coordination of the dam body and the covering layer is enhanced; and (3) steel bars are laid every three layers of geogrids, the steel bars are connected with the concrete lattice beams through the concrete anchoring sections, the restraining effect of the surface of the dam foundation is improved, the overall deformation coordination of the dam foundation is improved, and the horizontal deformation gradient of the dam foundation in the depth direction is reduced. Through the combination of rigid and flexible structures, the deformation resistance of the covering layer is enhanced, the deformation coordination of the dam body and the covering layer is improved, the risks of earthquake settlement and horizontal lateral displacement deformation are reduced, the overall anti-seismic property and stability of the dam body are improved, and the method is suitable for dam foundation reinforcement of earth and rockfill dam engineering on the complex deep and thick covering layer.

The invention belongs to the technical field of metal composite materials, and provides a high-toughness corrosion-resistant aluminum-magnesium composite board and a preparation method and application thereof. The composite board comprises a first aluminum alloy layer, a magnesium alloy layer and a second aluminum alloy layer which are sequentially stacked. The aluminum alloy layer comprises the following components: 3.0 to 5.5 percent of Mg, 0.3 to 1.2 percent of Mn, 0.1 to 0.4 percent of Si, 0.15 to 0.4 percent of Fe, 0.05 to 0.75 percent of Cu, 0.1 to 0.3 percent of Sc and the balance of Al; and the magnesium alloy layer comprises the following components: 2.0%-4.0% of Al, 1.5%-4.0% of Ca, 0.2%-1.0% of Mn, 0.1%-0.5% of Be, 0.5%-2.0% of Sn and the balance of Mg. By reasonably setting alloy components and selecting an asynchronous rolling process, the problems that the interface bonding strength in the aluminum-magnesium composite material is insufficient and a brittle and hard second phase is easy to generate are effectively solved.

This invention provides a flexible pressure-yielding support device and method for roadway floor heave, relating to the field of coal mine roadway support technology. The device includes a rigid load-bearing frame, a compressible bag, a crushed stone force-transmitting layer, a grouting hardening layer, a crushed stone removal unit, and a bag re-pressurization unit. The compressible bag is filled with a compressible buffer medium, which absorbs deformation energy during floor heave, achieving flexible pressure yielding. A pressure sensor and a solenoid valve work together to maintain the bag pressure within a set range. A flow sensor monitors the amount of medium discharged, triggering a limit warning when a threshold is reached. The crushed stone removal unit quantitatively removes compacted crushed stone from the frame, providing space for the bag to reset. The bag is then re-pressurized using underground compressed air pipelines, enabling the device to be reused cyclically. This invention features adaptive pressure yielding, limit warning, and reusability, solving the problems of poor coordination between existing support structures and large deformations in soft rock, unstable treatment effects, and single-use devices, significantly improving the treatment effect and economic benefits of floor heave.

The invention discloses a viscosity reduction type rock-based mineral admixture which comprises the following raw materials in parts by weight: 55-70 parts of a rock component, 30-40 parts of an activation component and 2-5 parts of a modification component, wherein the rock component is particles obtained by crushing and grinding hole slag rock; the high-strength large-flow-state concrete prepared from the viscosity reduction type rock-based mineral admixture is prepared from the following raw materials in parts by weight: 380 to 450 parts of Portland cement, 48 to 144 parts of the viscosity reduction type rock-based mineral admixture, 1650 to 1950 parts of homogeneous cave slag aggregate, 1 to 10 parts of an additive and 120 to 140 parts of water. Hole residues produced in the tunnel excavation process are prepared into the homogenized viscosity-reducing rock-based mineral admixture and aggregate, the homogenized viscosity-reducing rock-based mineral admixture and aggregate are matched with other components to prepare the high-strength large-flow-state concrete, it is guaranteed that the concrete can be conveniently applied to engineering construction, the utilization rate of the tunnel hole residues reaches 100%, the green production concept is practiced, and the construction cost is reduced. The method has the advantages of environmental protection, obvious economic benefit, stable concrete quality and the like.