52 results about "Fiber orientation" patented technology

The application provides a continuous fiber reinforced composite material additive manufacturing stiffened structure impact resistance design method, B-spline parameterization characterization is performed on a macroscopic topological distribution pseudo-density field and a microscopic fiber orientation fiber direction field, and B-spline control parameters are used as optimization design variables; impact resistance topology optimization based on an equivalent static load method is adopted, dynamic nonlinear analysis is performed through external circulation, and the stiffened topology and the fiber direction are cooperatively optimized under the equivalent static load through internal circulation, so that the stiffened structure topology distribution and the fiber direction distribution are obtained; then, the B-spline parameter field is mapped to a physical space reconstruction grid, and the topological and fiber direction representation of the physical space is obtained; finally, a continuous path planning algorithm based on a vector field is used to generate a one-stroke continuous printing path. The application solves the problem that the existing method is difficult to consider dynamic impact response modeling, fiber path continuity control and additive manufacturing process constraints, and cooperatively improves the impact resistance performance and manufacturability.

The utility model discloses a kind of plant fiber polishing grinding wheel, including polishing grinding wheel, abrasive composite layer and fiber framework layer;The surface central position of polishing grinding wheel is provided with through-hole;Abrasive composite layer is arranged in the inside of polishing grinding wheel, and the bottom of abrasive composite layer is provided with base layer;The utility model is by stress dissipation layer using alternate layer design of bottom layer, transition layer and working layer, different fiber direction or material lamination, impact load and centrifugal stress in the process of polishing and grinding can be effectively dispersed, reduce structural cracking risk;By abrasive composite layer using bottom layer, transition layer, working layer, three layers of wear-resistant structure design, by material performance complement, bottom layer high cohesive strength, transition layer stress buffer, make the wear life of polishing and grinding wheel than traditional single-layer structure has somewhat improved;By the plant fiber matrix of working layer endows abrasive composite layer with "flexible grinding" characteristics, can be attached to stainless steel pipe material, sheet complex curved surface, improve processing precision stability.

This invention provides a carbon fiber wheelchair decompression seat plate, comprising a U-shaped seat frame, a plate surface, a first reinforcing rib, a second reinforcing rib, and a mounting base. The U-shaped seat frame defines an open mounting space at the rear. The plate surface is connected to the U-shaped seat frame within the mounting space, forming a plane together with the upper surface of the U-shaped seat frame. The plate surface is composed of layers of unidirectional carbon fiber cloth and woven carbon fiber cloth, with the fiber direction of the unidirectional carbon fiber cloth arranged along the left-right direction of the plate surface. The plate surface has multiple strip-shaped hollow areas, and the extension direction is consistent with the fiber direction of the unidirectional carbon fiber cloth. The first and second reinforcing ribs are both composed of layers of unidirectional carbon fiber cloth, with their fiber direction at 90° to the extension direction of the strip-shaped hollow areas. They are correspondingly distributed on the front and rear sides of the strip-shaped hollow areas and located on the lower side of the plate surface, with their ends overlapping the left and right sides of the U-shaped seat frame, respectively. The mounting base includes a first base, a second base, and a third base, all of which are spliced ​​to the corresponding positions of the U-shaped seat frame, with the splicing points covered by carbon fiber prepreg.

The present application provides a laminated body having excellent thermal conductivity, lightness and rigidity, and an integrated molded body in which the laminated body is integrated with other components. The integrated molded body of the present application is an integrated molded body in which a structure formed of a thermoplastic resin and a reinforcing fiber is arranged on the outer peripheral portion of a laminated body in which at least a prepreg formed of a continuous carbon fiber and a resin is laminated, and the thermal conductivity λ1A in the fiber direction of the continuous carbon fiber of the first prepreg constituting the outermost layer of the laminated body is 100 [W / (m·K)] or more and 800 [W / (m·K)] or less. It is preferably used for an electronic device housing.

This invention discloses a method for preparing and applying elastic ceramic nanofiber flocs. Precursor coiled nanofibers are dynamically assembled using a periodically arranged spinneret module to form three-dimensional interwoven precursor nanofiber flocs. These flocs are then calcined at high temperature to obtain elastic ceramic nanofiber flocs. The flocs are cut into pre-formed sheets, conveyed by a conveying device, and wound onto the main mold of a self-rotating forming device under the action of auxiliary forming rollers. Adhesive is sprayed from the pre-formed sheets to achieve interlayer bonding, producing preforms. The main mold and preforms are placed into a matching mold to form a forming module. The preforms are then impregnated by an ultrasonic impregnation and homogenization device, followed by low-temperature treatment to form ice crystals in the impregnation solution perpendicular to the fiber direction, achieving inter-sheet stitching. Finally, the preforms are dried and demolded to obtain the finished product. This invention preserves the intrinsic elasticity and three-dimensional network structure of the fibers without damaging their structure and morphology, enabling short-process, high-efficiency, and continuous preparation of floc products.

The application discloses a preparation method and application of a nerve conduit with a multistage biomimetic nerve membrane structure and belongs to the technical field of tissue engineering materials. The nerve conduit with the multistage biomimetic nerve membrane structure comprises a biomimetic inner membrane support with a secondary guiding structure and a biomimetic outer membrane support with a double-layer structure. In the nerve conduit with the multistage biomimetic nerve membrane structure, the filler for playing a growth guiding role has a multistage guiding structure, the primary guiding is that cells are directionally migrated along the fiber direction in the directional fiber membrane, are elongated in shape on the fiber and are accelerated in differentiation, and the secondary guiding is that directional microchannels constrain the growth of nerve fibers, promote the maturation of bundling and the alignment of the growth direction. The application solves the problem of insufficient contact guiding efficiency existing in the prior art and overcomes the contradiction between the filling density of guiding fibers, the growth space and the guiding effect.

The invention discloses a traditional Chinese medicine residue sorting and quality grading method based on machine vision recognition. The method comprises the steps that an image sequence is collected, and exposure, white balance gain and light source driving quantity are recorded; a standardized image sequence is obtained through preprocessing, and a working condition drift tensor is constructed through batch difference; segmenting the target area, constructing an equivalent refraction-scattering weight map based on a particle size distribution parameter, a fiber orientation anisotropy parameter and a water-containing scattering indication parameter, and generating a physical token sequence; adopting improved VMama asymmetric scanning to obtain an anisotropic state characterization sequence; a prediction entropy is calculated, a physical consistency loss is constructed through a working condition drift tensor alignment residual error, and a self-adaptive normalized parameter set is obtained through TENT online updating; and reasoning to obtain a target sorting category and a target quality grade, and generating a shunting control instruction and grading record data for sorting and grading of a conveying line. According to the method, unmarked cross-working-condition sorting and consistent grading are achieved.

This invention relates to an automated machining method for circular composite material covers, belonging to the field of functional composite material machining. By identifying the fiber direction through photography and combining it with C-axis positioning at the turning center, the method achieves automated machining of composite materials according to the fiber direction. Integrating an image-based dimensional measuring instrument into the production line enables rapid online full-size inspection. By using a machine tool's internal probe to pre-determine product dimensions and automatically compensate, the method automates first-piece debugging during frequent production changes. Controlling cutting forces through process methods, and precisely controlling clamping forces with small-diameter hydraulic cylinders and gauges, effectively controls the deformation of thin-walled parts. By modifying the chip conveyor to remove large particles and fibers, using multi-stage sedimentation to remove suspended particles, and employing a belt degreaser to remove lubricating oil, the method solves the problem of ensuring the composite material coolant meets emission standards. The process is automated and cost-effective.

This invention discloses an inorganic powdered aromatherapy coating and its preparation and application methods. The coating comprises the following raw materials in weight percentages: slaked lime powder: 50%–65%; glutinous rice extract: 10%–18%; short-cut hemp fibers (80-120 mesh): 5%–10%; short cotton fibers (100-150 mesh): 3%–8%; natural mineral fillers: 5%–12%; composite fragrance powder: 8%–15%; nano-silica: 0.5%–2%; and natural plant adhesives: 0.5%–2%. This invention utilizes modern microencapsulation technology, fiber orientation process, and optimized inorganic matrix formulation to prepare the inorganic powdered aromatherapy coating. This coating not only provides a long-lasting, health-beneficial aroma release but also allows for the creation of various modern artistic textures through application techniques, achieving a deep integration of material and aesthetics. It is suitable for the restoration of ancient buildings, Chinese garden architecture, and interior wall decoration of health-oriented living spaces.

The present disclosure relates to a method for manufacturing a recycled fiber insulation board for fireproof doors that has excellent thermal insulation and is optimized for conditions required for a filling material for fireproof doors by using a fiber-based insulation material that is difficult to dispose of as waste, and a recycled fiber insulation board manufactured by the method. The present disclosure provides a recycled fiber insulation board having random fiber orientation and excellent water repellency by processing fiber-based insulation material waste, which has conventionally been disposed of by landfill, through a relatively simple method, thereby providing a recycled fiber insulation board for fireproof doors that has excellent heat resistance, thermal insulation, strength, and moisture resistance at low cost. Accordingly, the present disclosure has an effect of improving the quality of fireproof doors to which the recycled fiber insulation board is applied as a filling material while reducing manufacturing costs.

This invention relates to the field of biodegradable flowerpot technology, and more particularly to a plant fiber molded flowerpot and its manufacturing method. The flowerpot is made of the following components in parts by weight: 80-90 parts plant fiber; 10-20 parts composite binder; wherein the plant fiber includes at least one of rice straw and wheat straw with a length of 5-10 mm; the composite binder includes the following components in parts by weight: 60-80 parts modified urea-formaldehyde resin; 15-25 parts epoxy resin; 5-15 parts polyvinyl alcohol. This invention successfully achieves the manufacturing of plant fiber flowerpots with a height of over 15 cm, filling a gap in the industry. Through fiber orientation and gradient density molding, a balanced strength distribution from bottom to top is achieved. The composite binder system significantly reduces the water absorption rate of the flowerpot, improving the product's service life; and by adjusting the ratio of plant fiber to binder, the degradation rate is precisely controlled.

The present application relates to the technical field of automatic fiber placement forming of composite materials, and particularly relates to a fiber path design method and device for a variable stiffness composite laminate, wherein the method comprises: respectively establishing linear and nonlinear variable-angle fiber paths; calculating the fiber direction and initial mechanical properties of the variable stiffness composite laminate by using a linear variable-angle composite laminate finite element model and the linear variable-angle fiber path; constructing an optimal proxy model of the linear variable-angle composite laminate according to the initial mechanical properties, so as to calculate the optimal mechanical properties, and then calculate the optimal parameters of the linear variable-angle fiber path, and input the parameters into the finite element model to obtain a stress distribution state; and generating a variable stiffness composite laminate fiber path based on the principal stress direction by using the stress distribution state and the nonlinear variable-angle fiber path. Thus, the problems of complex manufacturing process and low mechanical properties of the variable stiffness composite laminate obtained by the existing fiber path design method are solved.

The application discloses a kind of automatic fiber placement reference line generation methods based on vector field analysis, first, draw several auxiliary lines on the surface along the vertical direction of 0 degree fiber direction, draw several reference line starting points on the surface, draw a geodesic line at each starting point as the basis reference line, calculate the nearest point of the basis reference line and each auxiliary line as the starting position of the reference line node optimization;Again, the laying surface is meshed, the fiber direction at each grid node is calculated, the geodesic curvature and angle deviation are calculated using the vector field analysis method, and the path planning quality comprehensive evaluation function is calculated;Finally, the optimal position of the reference line node is solved using the optimization algorithm, the objective function of the optimization algorithm is set as the reference line comprehensive evaluation function, the optimization variable is set as the position of the reference line node, and the optimal reference line is obtained by fitting node;The application can improve the design efficiency of reference line, thereby improving the efficiency and effect of automatic fiber placement path planning generation.

Exemplary system, method and computer arrangement for determining rotational invariants, fiber orientations, and scalar parameters of fiber tracts (e.g., compartment fractions, which can relate to intra / extra-cellular space volumes; compartment diffusivities; relaxation rates; exchange rates between compartments; characteristics of structural disorder such as axonal beading) from a general diffusion MRI acquisition is described. For example, gradient directions may not necessarily be arranged in so-called shells, and an acquisition may vary spatially. Furthermore, each acquisition can be undersampled in the k-space. A procedure can also be included for receiving information related to the at least one image. Another procedure can be provided for decoupling tissue and protocol parameters based on a singular value decomposition. A further procedure can be provided for grouping singular vectors into multiplets based on symmetries. Still further procedures can be provided for forming rotational invariants and / or for a parameter estimation.

A billiard cue rear handle includes a tubular casing formed by stacking a plurality of fiber fabrics, a damping member arranged at a front section of a center of the tubular casing, a weight adjusting system arranged at a rear section of the center of the tubular casing, and a shock absorbing layer coated on a surface of the tubular casing. The tubular casing further includes at least a first fiber fabric group formed by adhering a first unidirectional fiber fabric and a second unidirectional fiber fabric to each other, a fiber direction of the first unidirectional fiber fabric being parallel to an axis of the tubular casing, and a fiber direction of the second unidirectional fiber fabric being perpendicular to the axis of the tubular casing.

The application discloses a composite automatic fiber placement path dynamic optimization method, device and medium, and belongs to the technical field of composite automatic fiber placement. The method comprises the following steps: obtaining a three-dimensional model of a component to be laid, and obtaining surface curvature distribution characteristics and fiber laying angle constraints based on the three-dimensional model; processing the surface curvature distribution characteristics based on a path planning algorithm to generate an initial fiber placement path; driving a fiber placement head to perform reverse pre-tension control based on a tension mapping table and a temperature compensation coefficient; obtaining actual fiber orientation data according to a preset sampling period based on a polarized laser polariscope, and extracting fiber angle deviations of the actual fiber orientation data; processing the fiber angle deviations and resin viscoelasticity data based on a Bayesian optimization algorithm to dynamically correct the laying path and generate an update instruction; and adjusting the spatial pose and tension of the fiber placement head according to the update instruction. The application realizes dynamic multi-target fiber placement path optimization and real-time feedback control based on the above method.

The application provides a method for replacing engineering plastics with glass fiber reinforced flame-retardant polypropylene, and belongs to the technical field of replacing engineering plastics with glass fiber reinforced flame-retardant polypropylene. In the application, an optimal formula and a ternary synergistic ratio are input into a variational self-encoding-strengthening learning collaborative formula optimization model to search for a comprehensive optimal final formula in a continuous latent space. Then, a fiber orientation-stress collaborative anisotropy topology optimization algorithm is used to output an optimal geometric configuration of a product under the condition of a real anisotropic stiffness field. Subsequent batch process parameters are adjusted through closed-loop feedback of an interface compatibility comprehensive evaluation value. An artificial intelligence model drives exploration in a sparse area in the latent space with a cognitive uncertainty reward, cross-link data-driven collaboration is realized, and the technical problem that formula optimization and structure design of glass fiber reinforced flame-retardant polypropylene composites cannot achieve comprehensive synergistic optimization among mechanical properties, flame-retardant properties and interface compatibility is solved.

A prepreg from which a fiber-reinforced plastic having improved strength in a direction perpendicular to the fiber direction can be obtained, and a fiber-reinforced plastic having improved strength in the direction perpendicular to the fiber direction. The prepreg contains a matrix resin composition and carbon fibers. The matrix resin composition contains component (A) an isocyanuric acid derivative having a glycidyl group, represented by Formula (1) where X1 to X3 each represent a glycidyl group, an allyl group, an alkyl group, or a hydrogen atom, and at least one of X1 to X3 is a glycidyl group), component (B) a curing agent, component (C) a compound having a (meth)acryloyl group but no glycidyl group, and component (D) an epoxy resin excluding the component (A).

The invention provides an outer skin of an aircraft fuselage or of a section of an aircraft fuselage made of fiber-reinforced plastic, in particular carbon fiber-reinforced plastic (CFRP), in a layered construction, comprising at least two layers (105a, 105b) having electrically conductive fibers (400), in particular carbon fibers, which are placed in the layers (105a, 105b) in alternating fiber orientations and embedded in a polymer matrix material, and a coating (100) consisting of or comprising magnetically active particles (101), which is configured to induce a change in the physical properties of the coating upon exposure to a magnetic field (300). The invention also provides a method for monitoring the structural integrity of an outer skin of an aircraft fuselage or of a section of an aircraft fuselage, and an aircraft having a fuselage or a section of a fuselage equipped with such an outer skin.

The present application relates to mechanical structure design and the technical field of composite material processing mechanism research, especially to a kind of composite material fiber orientation tool wear mechanism test device and method, including rack, servo motor is fixedly installed at the bottom end of rack, control system is fixedly installed at the bottom end of rack one side, rotational speed sensor is installed on servo motor, pin shaft is set up on the side of friction disc upper side, pin shaft holder is set up on pin shaft, load sensor is fixedly installed on pin shaft holder, electric loading device is installed on load sensor, the present application can simulate the relative sliding between different space orientation carbon fiber chip and tool surface, the influence mechanism of carbon fiber orientation on tool wear performance is determined by analyzing tool wear morphology and friction force change under different carbon fiber orientation, so that the friction and wear characteristics between tool and chip can be completed on specific test device, avoid the waste of processing equipment resources caused by long time whole vehicle test.

The application relates to the technical field of insulating materials, and discloses a high-strength high-thermal-conductivity composite aramid fiber insulating paper and a preparation method. The composite aramid fiber insulating paper has a double-layer structure, the bottom layer is composed of pre-stretched aramid long fibers, and the surface layer is composed of aramid short-cut fibers, aramid deposited fibers and PDA-coated BNNS intercalation composite, wherein the BNNS is vertically arranged along the Z axis. The BNNS in the surface layer of the composite aramid fiber insulating paper is arranged in a direction, the thermal conductivity and the insulation performance can be optimized, the long fibers in the bottom layer are pre-stretched and treated by plasma to cooperatively improve the fiber orientation degree, and the composite aramid fiber insulating paper with cooperatively improved thermal conductivity, insulation and mechanical strength is obtained through gradient heat pressing; the composite aramid fiber insulating paper is suitable for power equipment, new energy motors and aerospace insulation fields in high-temperature environments.

This invention provides a method for designing carbon fiber sole plates, a storage medium, and an electronic device. The method includes: acquiring the material properties of carbon fiber nylon; constructing a first network model based on the fabrication process of the carbon fiber sole plate and setting the process parameters of the first network model; inputting the material properties of carbon fiber nylon into the first network model to obtain the carbon fiber orientation result of the carbon fiber sole plate prepared from carbon fiber nylon; constructing a second network model for structural analysis based on the material properties of carbon fiber nylon and the structural parameters of the carbon fiber sole plate; inputting the carbon fiber orientation result and the structural parameters of the carbon fiber sole plate into the second network model to obtain a carbon fiber sole plate model; setting the test conditions and test standards for carbon fiber sole plate test cases, and using the test cases to test the carbon fiber sole plate model to obtain test results; if the test results meet the test standards, then the carbon fiber sole plate model is taken as the design result of the carbon fiber sole plate. This solution can shorten the design cycle, improve comfort, and save costs.

The present application relates to the technical fields of additive manufacturing equipment, in particular to a kind of ceramic additive manufacturing in reinforcing body orientation controllable laying device and laying method, including plow combined scraper and moving mechanism, plow combined scraper includes plow blade and plane blade, plow blade is located in the front side of plane blade along the direction of laying, and plow blade bottom is equipped with comb structure.The present application can effectively scatter fiber winding group, make short-cut fiber along the core structure of preset single direction uniform distribution, orientation consistent, improve fiber orientation accuracy;Solve the problem that fiber orientation is difficult to accurately reverse in the layering of prior art, through the linkage of rotary drive mechanism, realize the controllable adjustment of fiber orientation angle in the process of layering, and different fiber orientation angles can be preset according to the mechanical requirements of different parts of ceramic parts.

The application discloses a kind of net plant fiber reinforced polylactic acid composite forming equipment, including melt plasticizing device, casting roll, forming roller, longitudinal negative pressure guide pipe, transverse negative pressure guide pipe, press roller, dynamic press roller, dynamic hydraulic cylinder, guide roller, winding roller, the application can continuously fast weave the net reinforcing structure of hemp fiber, increase periodic mechanical vibration and promote the penetration efficiency of polylactic acid melt between net hemp fiber, also disclose a kind of net plant fiber reinforced polylactic acid composite forming method, the forming composite material produced has net hemp fiber skeleton and polylactic acid layer wrapped net hemp fiber gap and surface, can increase the comprehensive mechanical strength of composite material, also can solve the defect problem that traditional fiber reinforced polymer resin composite material is due to high length-diameter ratio fiber orientation degree, material mechanical property presents anisotropy.

This disclosure provides a lithium-ion battery and its preparation method. Specifically, the positive electrode film layer includes a positive electrode active material, a solid electrolyte, a conductive agent, and a binder; the average fiber orientation angle of the positive electrode film layer is 40°~50°. The solid electrolyte layer includes a solid electrolyte and a binder; the average fiber orientation angle of the solid electrolyte layer is 40°~50°. By using a positive electrode film layer or a solid electrolyte layer with an average fiber orientation angle of 40°~50°, the electrochemical interface stability is improved, thereby enhancing the long-cycle performance and rate performance of the lithium-ion battery.

The invention provides a carbon fiber composite material battery shell as well as a preparation method and application thereof. The carbon fiber composite material battery shell comprises an upper cover and a box body; the box body is provided with side walls and an internal reinforcing beam; a skin of the box body is formed by compression molding of a plurality of layers of biaxial warp-knitted carbon fiber cloth; the internal reinforcing beam is a prefabricated carbon plate; the prefabricated carbon plate is embedded and fused in the skin of the box body in the compression molding process of the box body to form an integrated structure; when the maximum height-width ratio H / L of the side walls is larger than 0.2, the included angle between the main fiber guiding direction and the length direction of the box body ranges from + / -55 degrees to + / -65 degrees. When the maximum height-width ratio H / L of the side walls is smaller than or equal to 0.2, the included angle between the main fiber guiding direction and the length direction of the box body ranges from + / -30 degrees to + / -50 degrees. The weight is reduced, the consumption of the carbon fibers is reduced, meanwhile, the mechanical property is kept unchanged, the material can be applied to new energy electric vehicles, and the cost is reduced.

This invention relates to the field of textile inspection technology, specifically a machine vision-based cotton yarn color difference detection system. The system includes an image acquisition module, a radiometric correction module, a texture and chromaticity separation module, a deviation mapping module, a structural parameter extraction module, an error compensation module, and a color difference grading module. It acquires multi-view surface images of the yarn under test, a standard white board image, and a dark field image; after radiometric correction, a corrected chromaticity image is obtained; the yarn texture and pure chromaticity feature layer images are separated according to local grayscale variance; deviation mapping is performed using a flawless area as a benchmark to obtain a color difference feature spectrum; fiber orientation angle and grayscale co-occurrence matrix features are extracted and integrated into physical structural parameters to generate an error compensation coefficient-corrected color difference spectrum, thus obtaining the final color difference index; the final color difference index is then compared with the process tolerance threshold range of the yarn under test to obtain the color difference grading result. This invention can improve the efficiency of cotton yarn color difference detection.

A method of manufacturing a component for a sole structure of footwear articles includes providing a printer having a platform, a first head receiving a first supply, and a second head receiving a second supply. The method further includes printing a base layer on the platform, wherein the base layer comprises a substrate material and defines a longitudinal axis. Additionally, the method includes continuously printing a first fiber layer on the base layer, wherein the first fiber layer defines a first fiber orientation disposed at a first angle relative to the longitudinal axis, and continuously printing a second fiber layer on the first fiber layer, the second fiber layer defining a second fiber orientation disposed at a second angle relative to the longitudinal axis. The first angle differs from the second angle.

The present application relates to a kind of aerogel-FRP-metal high-performance composite laminated board and its preparation method, the combination component includes: aerogel blanket layer, FRP layer and metal plate layer.Wherein, FRP layer can be woven or stacked by different angle fiber lay-up composition.The aerogel-FRP-metal high-performance composite laminated board can be made by vacuum infusion process and mould pressing process etc..Since aerogel blanket layer has low density and excellent thermal insulation performance, it can effectively reduce heat conduction and heat radiation, provide good thermal insulation protection;FRP layer has high strength, fatigue resistance and corrosion resistance, and different fiber direction lay-up can be set according to actual engineering demand to increase the mechanical properties and durability of component, compared with prior art, the present application combines aerogel blanket layer, FRP layer and metal plate layer, the combination structure gives full play to the advantages of each layer material, realizes the comprehensive performance of light weight, high strength, high temperature resistance, fatigue resistance, corrosion resistance, can satisfy the engineering application demand of multiple fields.