303 results about "Structural material" patented technology

The invention relates to a method, a system and equipment for predicting creep stress at a joint of a concrete structure and a medium. The method comprises the following steps: testing a concrete structure material and a concrete structure joint filling material, and constructing a joint material performance database based on test data; constructing a multi-scale mechanical model comprising a macrostructure model and a microcosmic interface model based on the seam material performance database; constructing an interface constitutive relationship based on the seam material performance database and the multi-scale mechanical model; and predicting the creep stress at the joint of the concrete structure based on the material performance database at the joint, the multi-scale mechanical model and the interface constitutive relationship. The method can fully consider the sudden change of the performance of the material at the joint and the interface effect, provides reliable technical support for the safety evaluation and maintenance of the concrete structure, and is particularly suitable for engineering application of large-span and high-rise buildings and the like with higher requirements on the long-term performance of the structure.

The invention relates to the technical field of nondestructive testing and performance analysis of engineering materials, in particular to a nondestructive testing and performance degradation analysis method for bridge structure materials. The method comprises the following steps: acquiring material nondestructive testing monitoring data, and executing unified alignment, noise portraying and quality labeling; carrying out combined noise reduction and component evaluation, and generating a noise reduction parameter snapshot; extracting a marginal spectrum and characteristic energy ratio, and establishing a material characterization characteristic index dictionary; calculating a variation index, judging material performance degradation, and constructing a supervision signal; and training the prediction network, generating a trend and a residual error, and completing early warning fusion by adopting a time neighborhood consistency strategy to obtain a material performance degradation early warning level sequence. According to the method, continuous nondestructive monitoring and quantitative characterization of material levels are realized, characteristics and parameters are traceable, cross-channel and cross-time evaluation is consistent, prediction and early warning are sensitive and stable, and the method is suitable for long-term service safety evaluation.

The invention relates to the technical field of building construction intellectualization, in particular to a building construction intelligent monitoring system based on multi-source sensor data fusion. Comprising a data acquisition and storage unit; a data fusion processing unit; the construction state analysis unit uses an improved anomaly detection algorithm; a risk assessment early warning unit; and a visualization and decision-making unit. Through the dynamic adaptation module, the structural displacement feature weight is adjusted based on the construction stage parameters to preferentially extract the construction key stage structural features, and the structural material elastic deformation limit is corrected in combination with the material linear expansion coefficient and the temperature difference value; meanwhile, the dynamic critical generation module generates a risk critical judgment basis changing along with the construction process in combination with structural bearing capacity parameters and equipment mechanical stress limits in the construction stage, so that the problem that abnormal detection and risk judgment are lack of dynamic adaptability is solved; and the accuracy of personnel border crossing, equipment abnormity and structure abnormity identification and the adaptability of risk assessment are effectively improved.

The invention discloses a composite material hollow plate and a preparation method, and belongs to the technical field of composite material plate preparation. The composite material hollow plate comprises an outer plate and an inner plate, a plurality of corrugated supporting structures are connected between the outer plate and the inner plate, and a cavity is formed between every two adjacent corrugated supporting structures. A wear-resistant reinforcing agent is added into an outer plate material to improve the surface wear resistance, an epoxy-amine dual-core double-wall microcapsule is introduced into an inner plate material to enhance the crack repairing capacity, and a shape memory reinforcing agent is added into a corrugated supporting structure material to endow the material with the shape memory characteristic. The invention solves the technical problems of difficulty in consideration of strength and toughness, short service life, poor buffer performance, insufficient interface bonding strength and the like of the existing composite material hollow plate, and is particularly suitable for steel coil packaging and other application scenes requiring repeated use and high reliability.

The invention relates to special-corrosion-resistant martensitic heat-resistant steel and a preparation method thereof, belongs to the technical field of nuclear heat-resistant steel, and solves the problems of poor oxidation corrosion resistance, low strength and poor impact toughness and plasticity of ferrite / martensitic steel in high-temperature liquid lead bismuth in the prior art. The heat-resistant steel comprises the following chemical components in percentage by mass: 0.10-0.13% of C; 0.9 to 1.4 percent of Si; mn: 0.5 to 0.7%; 8.5 to 9.0 percent of Cr; 0.4 to 0.6 percent of W; 0.7 to 0.8 percent of Mo; 0.25 to 0.40 percent of Ni; 0.15% to 0.20% of V; 0.05 to 0.07 percent of Nb; the content of N is 0.045 to 0.065 percent; compared with the prior art, the heat-resistant steel disclosed by the invention has the advantages that a compact Si-rich oxide layer is ensured to exist in the heat-resistant steel by increasing the content of Si, so that the high-temperature liquid lead / lead bismuth corrosion resistance of the material is improved; by adjusting the content of Mn, Cr, Ni, W, Mo and other elements, it is ensured that the material has a single martensite structure, the heat-resistant steel has good room-temperature and high-temperature mechanical properties at the same time, and the heat-resistant steel is suitable for lead-cooled fast reactor structural materials.

According to the bamboo-wood structure material load monitoring system, a bamboo-wood structure material to be measured is divided into three parts, namely a first part and a second part which are bilaterally symmetrical and a third part in the middle, two bases are correspondingly arranged on one side of the bottom surface of the first part and one side of the bottom surface of the second part of the bamboo-wood structure material to be measured and used for supporting the bamboo-wood structure material to be measured; a pressure-bearing sheet is arranged in the middle of the upper surface of the third part of the bamboo-wood structural material to be detected, a load loading device is arranged on the pressure-bearing sheet, and in the monitoring process, the load loading device applies a load through the pressure-bearing sheet; according to the crack length of the third part and the applied load, the deflection value, the load and deflection corresponding relation and the maximum load of the bamboo-wood structure material to be measured are obtained.

The invention discloses an intelligent formwork platform safety monitoring method and system, and the method comprises the steps: obtaining the working information of an air building machine, setting a structure safety evaluation model for carrying out the safety evaluation of the structure of the air building machine, and calculating the structure safety degree of the air building machine according to the working information; setting a component material safety evaluation model for performing safety evaluation on materials of the air building machine, and calculating the safety degree of the structural materials of the air building machine according to the working information; setting a safety influence evaluation model of the environment on the air building machine, and calculating a safety influence index of the environment on the air building machine according to the working information; and carrying out weighted average on the structural safety degree of the air building machine, the structural material safety degree of the air building machine and the safety influence index of the environment on the air building machine, and when a final result exceeds a preset threshold value, sending out alarm information.

The invention discloses a 3D printing method with a coating supporting structure and a supporting assembly, and belongs to the technical field of additive manufacturing. According to the method, a traditional thought of printing a second structural material is abandoned, a functional coating used for reducing the binding force is innovatively arranged on the upper surface of a formed supporting structure, and then a workpiece is printed on the coating. The coating provides temporary bonding force in the printing process so as to stabilize a workpiece, and after printing, the bonding force is greatly weakened so that the support can be easily peeled off. The invention further provides a post-processing G code program for realizing the method and an integrated gluing device, and the post-processing G code program and the integrated gluing device can realize the expansion and contraction of the refill through mechanical triggering by utilizing the movement of the printer without additional driving. The support assembly is a ready-to-use component which is pre-coated with the coating. According to the method, the contradictions of poor supporting quality of a single material and high supporting cost of multiple materials are fundamentally solved, stable printing, easy removal and high interface quality are realized on the premise of not increasing the types of printing materials and not depending on multi-nozzle equipment, the cost is remarkably reduced, and the efficiency is improved.

This invention provides a hyperelastic flexible structure, forming tooling, and a method for fabricating the hyperelastic flexible structure. The hyperelastic flexible structure includes a first helical wire, a second helical wire, and welded mass microspheres. The length direction of the first helical wire is orthogonal to the length direction of the second helical wire. The welded mass microspheres are positioned at the intersection of the first and second helical wires to connect them. This invention connects the orthogonally arranged first and second helical wires with welded mass microspheres to form a hyperelastic flexible structure. Compared to existing hyperelastic structural materials, it possesses excellent multifunctional mechanical properties such as large deformation recovery elastic deformation and zero Poisson's ratio. It can be used as a skeletal reinforcement for novel multiphase composite hyperelastic structural materials or as a standalone component.

The invention discloses high-endurance-strength high-silicon martensite heat-resistant steel for a lead-bismuth reactor and a preparation method of the high-endurance-strength high-silicon martensite heat-resistant steel, and belongs to the technical field of corrosion-resistant and heat- The heat-resistant steel comprises C, Si, Cr, Ni, Mo, W, Mn, V, Nb and N, the Mo equivalent is 0.8-1.2, the CNB is smaller than 14, and the balance is Fe and inevitable impurities. The formation of a compact SiO2 protective film is promoted by increasing the content of Si, and meanwhile, Mo and W are adopted for synergistic solution strengthening and are matched with N, V and Nb to form a dispersed MX precipitated phase. The heat-resistant steel is prepared through the processes of smelting, homogenizing, forging, hot rolling, normalizing and tempering, and a full-martensite structure can be obtained. And the obtained material has good liquid lead and bismuth corrosion resistance, room-temperature and high-temperature mechanical properties and relatively high high-temperature endurance strength, and is suitable for structural materials serving in high-temperature liquid lead and bismuth environments such as a lead-cooled fast reactor and the like.

The invention specifically discloses a support structure material and surrounding rock degradation simulation test device in an underground water seepage environment, and relates to the technical field of tunnel and underground engineering experiment equipment. The device is composed of a dynamic water pressure tank, a water flow control system and a water pressure adjusting system. The dynamic water pressure tank comprises a top plate and a bottom plate, the top plate is provided with the water pressure adjusting system composed of an air inlet valve, an air release valve and a pressure gauge, the bottom plate is provided with a water outlet, and the dynamic water pressure tank is internally provided with a seepage action bin and a clamping plate; the water flow control system is composed of a water tank, a constant flow water pump, a water inlet pipe, a flow control valve and a flow meter. The device can simulate the degradation process of a supporting structure material and a surrounding rock material under the combined action of different underground water seepage flow velocities and water pressures, can provide reliable test data for studying the durability and safety evaluation of an underground engineering structure through a simulation test, and has the characteristics of compact structure, simplicity and convenience in operation and strong controllability.

The invention relates to a method for machine learning aided design of a structural alloy for a fourth-generation thorium-based molten salt reactor, and belongs to the technical field of artificial intelligence auxiliary material design. The method comprises the steps that S1, an alloy component machine learning model for phase composition prediction is established, specifically, based on known alloy sample data, the sample data comprise alloy element content and corresponding phase composition information, and the machine learning model used for predicting alloy phase composition is established; s2, screening an initial alloy component space through phase composition constraint conditions; s3, secondary screening of alloy components based on thermodynamic simulation; s4, alloy sample preparation and solid solution homogenization treatment; s5, carrying out a mechanical property test; and S6, experimental result feedback and machine learning model closed-loop updating are carried out. According to the method, the artificial intelligence technology and the traditional alloy design theory are organically fused, an efficient and reliable new path is provided for research and development of key structural materials for the fourth-generation thorium-based molten salt reactor, and the important scientific research value and the engineering application prospect are achieved.

The invention discloses a concrete structure damage variable-scale finite element simulation method based on two layers of grids, which comprises the following steps: step 1, respectively carrying out structure scale and material scale finite element grid subdivision on a concrete structure to obtain a structure-material two-layer grid covering the whole structure simulation area; 2, endowing material parameters to a structure scale unit and a material scale unit, and respectively establishing a structure scale finite element model and a material scale finite element model of the concrete structure; and 3, based on a simulation scale transformation criterion and a structure scale-material scale connection technology, dynamically updating the structure scale-material scale collaborative finite element model, and simulating a concrete structure damage evolution process. According to the method, the simulation scale of the damage area is converted based on the two layers of grids, so that the simulation precision of the concrete damage evolution process can be ensured, the calculation efficiency is relatively high, and the method has a wide application prospect in the refined analysis of the concrete structure damage evolution process.

This invention provides a high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process, belonging to the field of coating modification technology. The high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process specifically includes the following steps: S1. Target material selection and preparation; S2. Alloy substrate treatment; S3. Low-temperature nanocrystalline coating deposition; S4. Coating densification treatment; S5. Low-temperature recovery annealing; S6. Pre-oxidation treatment. Through the synergistic process of low-temperature preparation of the alloy nano-coating, densification annealing, and pre-oxidation, the high-temperature strength and phase stability of the coating are improved by utilizing the lattice distortion effect. A thermodynamically stable protective oxide film of aluminum oxide and chromium oxide is generated in situ on the surface, solving the problems of traditional chromium-based coatings such as few main components, poor oxidation resistance, and short lifespan. This significantly improves the service reliability and safety of nuclear reactor structural materials under high-temperature irradiation environments.

The application discloses an oil fume extractor, which comprises a smoke gathering module, the smoke gathering module comprising side plates, a back plate, an oil baffle and a sealing layer, the back plate being provided with the side plates on opposite sides thereof, the oil baffle being arranged in front of the back plate and between the side plates on the opposite sides, the oil baffle being connected with the side plates and the back plate, and the sealing layer being formed by melting and molding of deformable porous structure material, the deformable porous structure material being suitable for being crimped between the oil baffle and the side plates and between the oil baffle and the back plate. The deformable porous structure material has a large compression amount due to the porous structure and the deformation, so that the assembly between the back plate, the side plates and the oil baffle is facilitated, the joint between the back plate and the oil baffle and between the side plates and the oil baffle is as small as possible, and the sealing layer can be formed between the back plate and the oil baffle and between the side plates and the oil baffle after the melting and molding of the deformable porous structure material, so that leakage is prevented.

Described herein are novel methods, reusable frameworks, and systems for producing building materials, structural materials, and concretes. The methods include adding a plurality of aggregate particles to a framework, thereby forming a framed plurality of aggregate particles, flowing a first fluid comprising cementation reagents through the framed plurality of aggregate particles or flowing the first fluid through the framed plurality of aggregate particles at a pressure greater than atmospheric pressure, wherein the fluid is introduced to the framework from a direction such that the flow operates against the force of gravity, and reacting the cementation reagents with a biological organism and / or an enzyme comprised within the fluid or within the framed plurality of aggregate particles for a sufficient time to consolidate the framed plurality of aggregate particles, thereby forming the construction material.

The invention provides an efficient temperature-resistant heat-insulating structural material and a preparation method thereof.The prepared efficient temperature-resistant heat-insulating structural material takes a three-dimensional fabric integrally woven and formed as a supporting body, the three-dimensional fabric is provided with a plurality of space structures, and multiple layers of S O2 aerogel are generated in the three-dimensional space structures through a sol-gel method; a supporting body used by the structural material is a three-dimensional fabric containing a plurality of space structures, and storage space is provided for a heat insulation medium as much as possible, so that the heat insulation performance of the heat insulation medium is optimal; according to the preparation method of the structural material, the three-dimensional structure in the supporting body is fully filled to the maximum extent by adopting multiple times of supporting body dipping, aging and normal-pressure drying, and the amount of aerogel which exerts the heat insulation performance is increased, so that the structural material has better heat insulation performance; according to the structural material, due to the protection of the supporting body on the aerogel, the problem of powder falling of a similar aerogel fiber felt in the using process is better avoided, and the temperature resistance and heat insulation performance of the structural material is longer.

The invention discloses a lead and bismuth corrosion resistant high-entropy alloy and a pre-oxidation treatment method thereof, and belongs to the technical field of lead and bismuth corrosion resistant nuclear structural materials. Ni: 30%; 10% of Cr; 20% of Al; 4.5% of Ti; 10.5% of Co; the microstructure of the high-entropy alloy is characterized by being of a face-centered cubic and body-centered cubic double-phase structure; and the face-centered cubic phase is a disordered structure phase enriched by Fe and Cr. According to the lead and bismuth corrosion resistant high-entropy alloy and the pre-oxidation treatment method thereof, multiple layers of uniform and compact Al2O3, TiO2, Cr2O3 and FeCr2O4 oxide films with protectiveness are generated on the surface of the FeNiCoCrAlTi high-entropy alloy from inside to outside, and the lead and bismuth corrosion resistance of the alloy is remarkably improved. The method is easy to operate, low in cost and excellent in lead and bismuth corrosion resistance.

The invention belongs to the technical field of embedded steel bar adhesives, and particularly relates to a low-temperature quick-drying embedded steel bar adhesive which comprises a material A and a material B. The material A comprises the following components in parts by weight: 18-22 parts of epoxy resin, 4.8-5.3 parts of a diluent, 0.5-0.6 part of first white carbon black and 18-22 parts of first silica powder; and the material B comprises the following components in parts by weight: 10-12 parts of a curing agent, 0.1 part of a coupling agent, 0.5-0.8 part of second white carbon black, 6.5-11.5 parts of second silica powder and 0.03-0.06 part of color paste. The overall structure provided by the embodiment of the invention has certain thixotropy and does not flow during construction; good bonding performance with most structural materials is achieved; the adhesive is free of crystallization and low-temperature curing, can well meet various requirements specified in the national standard, meets the construction requirement at the low temperature of-10 DEG C, can be stressed for 2 hours at the normal temperature of 23 DEG C, is high in corrosion resistance, does not flow during construction, and has high adhesive property.

The present application relates to the technical field of metal additive manufacturing, and aims at the problem of uneven pore size distribution and serious fine powder gasification and splashing in the existing additive manufacturing method for preparing porous structure materials, and provides a uniform porous structure material prepared by multi-pass scanning additive manufacturing and a preparation method thereof, which comprises the following steps: S1, an entity model of a space enveloped by the porous material is established, and slicing and layering are performed to obtain a plurality of model slices; S2, metal powder is laid into a powder layer, and then a laser powder bed additive manufacturing equipment is used to perform first-pass preprocessing scanning on the model slices, increase the high laser power, reduce the scanning speed, and perform second-pass forming scanning on the model slices to obtain the uniform porous structure material prepared by multi-pass scanning additive manufacturing.The present application fundamentally solves the problem of mismatch between the Gaussian distribution laser beam and the normal distribution powder particle size, can stably prepare uniform connected pores, and does not need subsequent powder cleaning treatment.

The invention belongs to the field of preparation of high-performance metal structure materials, and particularly relates to a method for preparing a Ti2AlNb alloy based on spherical titanium alloy powder. Commercial spherical titanium alloy pre-alloyed powder containing at least two elements of Al, Zr, Mo and V and pure niobium powder are selected as base materials, the spherical powder, the pure niobium powder and pure aluminum powder are evenly mixed according to the designed atomic proportion, a densification path of vacuum sintering or spark plasma sintering after cold isostatic pressing is adopted for preparing a consumable electrode blank, and the consumable electrode blank is prepared into a self-consumable electrode. And finally, a Ti2AlNb-based alloy cast ingot is obtained through vacuum self-consuming electric arc melting. According to the invention, not only is the technical bottleneck of inevitable gravity segregation in the smelting process of the Ti-Al intermetallic compound with high Nb content broken through, but also a brand new material preparation technical route with low cost, high performance and high stability is constructed; an industrialization feasible scheme is provided for solving the bottleneck problem of short-time high-temperature light structural materials in the aerospace field.

The invention discloses a preparation method of a coarse / fine grain double-structure texture graphene-magnesium-based composite material, and belongs to the field of metal material preparation. According to the method, graphene forms an enrichment area and a lean area in a magnesium matrix through a powder mixing process, and then cold pressing, sintering and hot extrusion forming are performed to prepare the composite material with a coarse grain and fine grain double-structure tissue. According to the method, the problem that plasticity of a traditional graphene-magnesium-based composite material is reduced due to the fact that grains are too refined is solved, the material strength is remarkably improved, and meanwhile the ductility and toughness of the material are effectively improved. The preparation method is simple in process, low in cost and suitable for preparation of light high-strength structural materials such as low-altitude aircrafts and new energy automobiles, and has wide application prospects.

The application provides a building structure material quantity prediction method and device based on a knowledge embedding neural network, electronic equipment and a storage medium, wherein the method comprises the following steps: obtaining design conditions of a target building structure, the design conditions comprising seismic design conditions, wind resistance design conditions and overall geometric design conditions of the structure; obtaining a structure design scheme of the target building structure, the structure design scheme comprising the spatial positions and geometric sizes of walls, columns, beams, plates and supports; inputting the design conditions and the structure design scheme into a pre-trained material quantity prediction model to obtain the material quantities of various materials in the target building structure. The method embeds prior knowledge into the material quantity prediction model, overcomes the defects of the prior art that the material quantity prediction value violates the basic common sense of engineering and has low prediction accuracy due to the inability to consider the prior knowledge in the field related to building structures, and realizes accurate and efficient prediction of the material quantity of the target building structure.

To provide a structural member which can be positioned with high accuracy and joined to another structural member while simplifying a process, a method for manufacturing the structural member, and a method for manufacturing a structure.SOLUTION: And a plurality of stud members 13 each having a shaft portion 31 and a head portion 33 having a diameter larger than that of the shaft portion 31, the head portions 33 being disposed on the same plate surface 25a side at a plurality of positions spaced apart from each other in a plate surface 25a of the first flange portion 25, the shaft portions 31 being provided so as to penetrate the first flange portion 25, wherein the structural member 11 has a plurality of positioning portions 35 for positioning the structural member 11 when being joined to another member, and the positioning portions 35 include end surface 33a portions of the head portions 33 of the plurality of stud members 13 provided on the first flange portion 25 on a side opposite to the shaft portions 31.SELECTED DRAWING: Figure 2

Embodiments of the present disclosure relate to methods of fabricating optical devices. One embodiment of the method includes disposing a layer of structural material on a surface of a substrate and disposing a patterned photoresist over the layer of structural material. The patterned photoresist has at least one device portion and at least one auxiliary portion. Each device portion and each auxiliary portion exposes an unmasked portion of the layer of structural material. The unmasked portions of the layer of structural material corresponding to each device portion and each auxiliary portion are etched. Etching the unmasked portions forms at least one optical device having a device structure corresponding to the unmasked portion of the at least one device portion and at least one auxiliary region having an auxiliary structure corresponding to the unmasked portion of the at least one auxiliary portion.

The invention discloses a method for evaluating seawater resistance of a cyanate ester-based composite material for a structural material, and belongs to the field of material performance testing, and the method comprises the following steps: S1, preparing a sample plate of the cyanate ester-based composite material for seawater resistance testing, and cutting the sample plate into a sample sheet I, a sample sheet II and a sample sheet III; s2, soaking the sample piece I, the sample piece II and the sample piece III, and sampling and testing at different time nodes; s3, obtaining a fitting equation about the water absorption rate, the interlayer shear strength and the glass transition temperature; s4, converting into a long-time fitting equation; s5, calculating an evaluation score; s6, comparing the evaluation score S with the required score of the allowable value of the cyanate ester matrix composite to obtain an evaluation conclusion; the evaluation score is calculated through fitting equations corresponding to the water absorption rate, the interlaminar shear strength and the glass transition temperature, and the method is used for predicting the seawater resistance of the cyanate ester matrix composite for the structural material.

To provide a cushioning material that can be attached to irregularly shaped structural materials, has a short delivery time, reduces the number of parts, and is easy to disassemble and reuse. [Solution] The cushioning material 1 consists of four cushion blocks 10 connected in series along the center line c with a connecting portion 14 in between. A fixing hole shape 20 extends from the leading cushion block 10, and a fixing string shape 30 extends from the trailing cushion block 10. Each cushion block 10 has a rectangular base portion 12, a pillow portion 11 provided on the base portion 12, a circular projection portion 13 protruding from the lower surface 12a of the base portion 12, and umbrella portions 17, 18, and 19 that protrude from the outer circumferential surface of the projection portion 13 at intervals.

A composition contains a resin, 39 vol % or more cerium oxide, and silica.

The present application belongs to the technical field of nickel-based alloy seamless pipe and its manufacturing technology, and particularly relates to a coarse equiaxed crystal structure N08120 nickel-based alloy seamless pipe and a preparation method thereof. By controlling the content of carbon, chromium, nickel and niobium and the like in the N08120 nickel-based alloy, and the cold rolling deformation and the heat treatment temperature, the formation and uniform distribution of the coarse equiaxed crystal structure in the nickel-based alloy seamless pipe are ensured, and the performance of the N08120 nickel-based alloy seamless pipe is not adversely affected. The preparation method of the N08120 nickel-based alloy seamless pipe provided by the present application realizes the requirement of the nickel-based alloy seamless pipe having the coarse equiaxed crystal structure, and the prepared seamless pipe has good high-temperature stability, corrosion resistance and mechanical properties, high size precision and good surface quality, and can be used in the structural material field of various specifications of furnace pipes, heating pipes and hot storage devices and the like, improves the stability and corrosion resistance of the structural material, and has important significance for actual production.