162 results about "Interlaminar shear" patented technology

The invention discloses a carbon fiber sizing agent composition suitable for thermoplastic resin, sized carbon fiber, a carbon fiber sizing agent as well as a preparation method and application of the carbon fiber sizing agent, belongs to the technical field of carbon fiber sizing agents, and solves the problem that a sizing agent in the prior art cannot meet excellent mechanical properties and high temperature resistance at the same time. The composition is prepared from the following components in parts by weight: 15 to 35 parts of modified polyaryletherketone resin matrix, 0.3 to 2 parts of neutralizer, 1 to 3 parts of emulsifier, 1.5 to 3 parts of defoaming agent and 57 to 80 parts of deionized water. The sizing agent containing the composition has good wettability and film-forming property on the surface of the carbon fiber, and meanwhile, the sizing agent is matched with other components with specific contents in the composition, so that the carbon fiber sizing agent containing the carbon fiber sizing agent composition has excellent heat resistance, can bear processing at the high temperature of 350 DEG C or above, and has good application prospects. And the composite material containing the sizing agent has excellent interlaminar shear strength.

The invention discloses a bamboo longitudinal and wood transverse composite whole container bottom plate and a preparation method thereof, and belongs to the field of bamboo-wood composite materials. The bottom plate is of a seven-layer alternate paving structure and is formed by compositing transverse wood veneer layers and longitudinal radial bamboo curtain layers, wood veneers are made of lignin modified polyurethane adhesive (reinforced by nano-silicon dioxide), and bamboo curtains are made of bamboo fiber nano-crystal reinforced soybean protein adhesive (cross-linked by genipin). Through continuous paving, fixed-length saw cutting and a'cold-in-cold-out 'hot pressing process (the pressure is 1.5-8.0 MPa, and the temperature is 140-220 DEG C), whole-piece production of any length is achieved. According to the technology, the bamboo-wood interface bonding problem is solved, the bending strength reaches 120 MPa, the interlayer shear strength is 7.8 MPa, the strength retention rate after damp-heat aging resistance is 90%, the formaldehyde emission is smaller than or equal to 0.05 mg / m < 3 >, the bio-based carbon content is 85%, high strength, weather resistance and environment friendliness are achieved, a traditional spliced container bottom plate can be replaced, the material utilization rate is increased by 20% or above, and the manufacturing cost is remarkably reduced.

The invention provides a method for improving the interface performance of an aramid fiber laminate composite material through high-temperature pretreatment and a preparation process of the aramid fiber laminate composite material, and relates to the field of performance improvement of composite materials. Comprising the following steps: S1, heating aramid fibers at 150-300 DEG C for 3-15 minutes, and immediately taking out the aramid fibers; s2, fully and uniformly coating epoxy resin on the aramid fiber obtained in the step S1; and S3, carrying out molding treatment on the aramid fiber obtained in S2 to obtain the aramid fiber composite material with improved interface performance. The simple high-temperature pretreatment method is adopted, the number of polar functional groups on the surface of the aramid fiber is increased, the resin impregnation degree of the aramid fiber and the bonding performance between fiber-resin interfaces are improved, and the interlaminar shear strength of the composite material is greatly improved.

The invention discloses a composite material fan blade layering design method in the technical field of aero-engine fan blade design, and the method comprises the following steps: S1, constructing a blade model, and carrying out optimization based on a model structure; s2, prepreg is selected, the curing thickness of a single layer of prepreg is obtained through a laminated plate curing process, a laying layer profile diagram is extracted according to the blade optimization model, and laying layers are grouped according to the height; s3, paving layers are uniformly arranged according to a height marshalling method under the paving layer design criterion condition, paving layer angles are given, whether the requirements are met or not is judged, and a preliminary blanking drawing is generated; and S4, carrying out cutting design on the prepreg according to the blanking drawing. According to the method, through parametric modeling and actual measurement data calibration, tenon extension design and layering angle distribution and sorting design are optimized, fiber continuity is ensured, process accumulative errors are eliminated, then, 90-degree layering is locally introduced to enhance out-of-plane rigidity, stress concentration is dispersed in combination with step transition treatment, and therefore the method has the advantages of being simple in structure and convenient to operate. And the peak value of the interlayer shear stress of a tenon-blade body transition area is reduced, and the impact resistance is improved.

The invention provides toughened epoxy resin for a carbon fiber epoxy prepreg and a preparation method of the toughened epoxy resin, and relates to the technical field of high polymer material preparation. The preparation method comprises the steps of aminating phenyl polymethylsiloxane, modifying epoxy resin and preparing toughened epoxy resin. And aminating phenyl polymethylsiloxane: mixing phenyl trimethoxy silane, 3-aminopropyltriethoxysilane and a diluent, dropwise adding a catalyst, and adjusting the pH value after a reaction to obtain the amino-containing phenyl polymethylsiloxane. The epoxy resin is modified, wherein phenyl polymethylsiloxane containing amino groups and polyhedral oligomeric silsesquioxane are used as modifiers. And preparing toughened epoxy resin: mixing the modified epoxy resin, solid epoxy resin, a diluent, a curing agent and a flame retardant. The toughened epoxy resin prepared by the invention maintains a high glass transition temperature while toughening, and optimizes the interlaminar shear strength and flexural modulus of the carbon fiber epoxy prepreg.

The invention belongs to the technical field of carbon fiber surface treatment, and particularly relates to a cross-linked polymer modified carbon fiber, a preparation method and a composite material. Aiming at the problem of insufficient interface bonding force between the existing polyarylsulfone / ketone thermoplastic sizing agent and the carbon fiber, the core of the invention is to apply a polyarylsulfone / ketone derivative of which a main chain or a side chain is provided with an electrochemically crosslinkable active group to the technical field of carbon fiber surface treatment. And constructing a covalent bond combined three-dimensional network structure coating on the surface of the carbon fiber in situ. According to the method, firm anchoring of the coating and the carbon fibers is achieved, and the interface load transmission efficiency and the interlayer shear strength of the carbon fiber / polyether-ether-ketone composite material can be remarkably improved. The method is mild in process condition, easy in parameter control and convenient in post-treatment, meets green manufacturing requirements, and has remarkable large-scale production advantages.

The invention provides a system and a method for detecting the mechanical property of a micro area of a composite material structure, and belongs to the technical field of material mechanical testing equipment. Comprising a fixing base and testing equipment, a clamping device is arranged in the fixing base and used for fixing a tiny test piece, force generated by the testing equipment is transmitted to the tiny test piece, a pressing disc is arranged in the testing equipment and controlled by a servo motor to move, and force is applied to the tiny test piece fixed in the clamping device; and an improved short beam shearing method is adopted for interlayer shearing performance testing. The bottleneck problem in the aspect of testing the interlayer shear strength of the composite material in a specific small area in the current composite material industry is solved, an important testing means is provided for research and development of the composite material, and experiments prove that the measurement repeatability error of the system is smaller than 2%, the standard requirement is completely met, and the system has a wide application prospect.

The invention discloses a preparation method of a PE bulletproof plate. The preparation method comprises the following steps: S1, preparing materials; s2, laminating and laying: pre-stretching or pre-heating the UHMWPE fiber non-woven cloth before laying by adopting a cross laying structure (1); (2) cleaning the mold, and laying a layer of demolding cloth; (3) a first layer of UHMWPE fiber non-woven cloth is laid, the fiber direction is set to be 0 degree, then a layer of resin film is laid, a second layer of UHMWPE fiber non-woven cloth is laid, the fiber direction is rotated by 90 degrees and is perpendicular to the first layer, and the steps are repeated; a multi-stage temperature-pressure curve is adopted in the hot press molding stage, the porosity can be effectively and remarkably reduced, the interlaminar shear strength (ILSS) is improved, the product size stability is extremely high, a cooling curve is designed according to the crystallization dynamic characteristics of resin during cooling, slow cooling is achieved in the crystallization temperature interval, and the product quality is improved. The resin is promoted to form a more perfect crystal structure with a more uniform size.

The invention relates to a continuous fiber reinforced thermoplastic pressure pipeline and a preparation method thereof, the continuous fiber reinforced thermoplastic pressure pipeline is provided with a core pipe inner layer, a core pipe outer layer, a continuous fiber winding middle layer and a maleic anhydride grafting modification interface layer, the continuous fiber winding middle layer is wound on the surface of the core pipe inner layer, and the maleic anhydride grafting modification interface layer is wound on the surface of the core pipe outer layer. The maleic anhydride grafting modification interface is a transition layer between the continuous fiber winding middle layer and the outer layer of the core pipe, and the continuous fiber winding middle layer comprises continuous fibers and a resin film. The invention has the following beneficial effects: 1, a special prepreg process is adopted, a maleic anhydride grafting interface layer is added, and gradient heating is carried out, so that the problem of fusion and combination of thermoplastic materials is solved, the interlaminar shear strength is 35.1-42.0 MPa, and the internal pressure resistance of the pipeline reaches 15.2-20.1 MPa, which is far higher than that of a traditional winding pipeline by 50-100%; 2, the strength and the cost are balanced through the hybrid design of the continuous fiber winding middle layer, and the cost is reduced by 30%-40% compared with that of a full carbon fiber reinforced pipeline;

The utility model discloses a carbon fiber prepreg cloth preparation device, and particularly relates to the field of carbon fiber processing, the carbon fiber prepreg cloth preparation device comprises a workbench, the upper end of the workbench is provided with a connecting assembly, the connecting assembly comprises a mounting rack, the upper end of the mounting rack is fixedly provided with an air cylinder, the bottom of the air cylinder is sleeved with an air rod, and the outer part of the air rod is connected with a spring in a surrounding manner; a connecting plate is fixedly connected to the bottom of the air rod, and connecting frames are symmetrically and fixedly arranged at the two ends of the bottom of the connecting plate. According to the utility model, through the arrangement of the connecting assembly, the carbon fiber prepreg cloth is moved into the resin soaking tank through the connecting rod for soaking operation, and in the soaking process, surface and internal pores of carbon fibers can be fully soaked, and gaps among the fibers can be filled, so that good physical contact is formed between resin and the carbon fibers; and the resin is subjected to a cross-linking reaction in subsequent curing, and is tightly combined with the carbon fibers, so that the mechanical properties such as interlaminar shear strength and tensile strength of the composite material are improved.

The invention discloses an interlaminar shear test method for an asphalt mixture composite board. The method comprises the following steps: preparing an asphalt mixture composite board test piece; putting the obtained asphalt mixture composite board test piece into an environmental box for heat preservation; the testing machine is adjusted to the testing temperature, and the asphalt mixture composite board test piece obtained after heat preservation is placed on a special clamp; vertically and downwards loading the asphalt mixture composite board test piece at a constant speed, and collecting pressure load and vertical displacement; and calculating the shear strength and the interlayer bonding coefficient. According to the interlayer shear test method for the asphalt mixture composite board, the problem that an interlayer shear test method special for the asphalt mixture does not exist in the prior art is solved.

The invention provides a method for improving the high-temperature interface strength of a quartz fiber reinforced polyimide resin composite material. The method comprises the steps of fiber cleaning, fiber surface activation, fiber surface grafting treatment and composite material preparation. Taking a quartz fiber reinforced PMR type polyimide resin composite material as an example, the bending strength of the composite material prepared by the method is greater than or equal to 373.5 Mpa under the test condition of 350 DEG C / 20 min, and is improved by 46%; the interlayer shear strength is greater than or equal to 34.5 MPa and is improved by 43%, and the dielectric constant is less than or equal to 3.40. The method solves the problems of poor interface bonding strength, low mechanical strength and poor structural stability of the quartz fiber reinforced polyimide resin-based composite material under the long-time high-temperature working condition, and is simple, easy to operate and suitable for batch production and application.

This application relates to the field of household appliance technology, disclosing a panel and its molding process, and a household appliance. The panel includes: a fiber composite material layer; and a magnetic insert located on one side of the fiber composite material layer in the thickness direction. The magnetic insert includes a magnetic material and a resin encapsulating the magnetic material. The resin encapsulating the magnetic material can chemically react with the resin of the fiber composite material layer, thereby enhancing the bonding strength between the fiber composite material layer and the magnetic insert, eliminating the physical interface between the fiber composite material layer and the magnetic insert, and improving the interlayer shear strength. This completely solves the problems of panel delamination and warping caused by the difference in thermal expansion coefficients due to the addition of metal sheets in traditional processes. Moreover, the connection between the fiber composite material layer and the magnetic insert can be achieved by utilizing the chemical reaction between the resin encapsulating the magnetic material and the resin of the fiber composite material layer, eliminating the need for additional adhesive films or mechanical connectors.

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.

The present application relates to a kind of lightweight biomimetic discontinuous fiber spiral composite protective structure, belong to lightweight protective structure design technical field.The lightweight high-strength high-toughness biomimetic discontinuous fiber spiral composite protective structure of the present application is stacked by unit intermittent fiber fabric according to different arrangement angles and arrangement ways, under the condition of local stress concentration in relaxation layer, shear stress is distributed to the intermittent connecting part in each layer, the concentration of interlaminar shear stress is relieved, using the interlaminar shear stress distribution mechanism of the composite material makes crack frequently deflect when it bears load, can delay material failure and destruction, greatly improve the bearing and energy absorption capacity of the composite protective structure.

This application discloses a specimen, fixture, and method for testing the interlaminar shear properties of fiber-reinforced composite materials. The specimen is integrally molded, generally strip-shaped and flat, with multiple stacked fiber layers inside. The thickness plane of the specimen is approximately parallel to the plane of the fiber layers. The specimen has a force-bearing portion at its center. Along its length, the specimen has a first clamping and fixing portion and a second clamping and fixing portion at each end. A first connecting portion is formed between the first clamping and fixing portion and the force-bearing portion, and a second connecting portion is formed between the second clamping and fixing portion and the force-bearing portion. The specimen is clamped and fixed to the testing equipment using the fixture, and then the testing equipment applies a tensile force to the specimen to perform a tensile test, resulting in good test accuracy. Furthermore, the specimen has a simple and compact structure, is easy to manufacture, and the fixture provides flexible and convenient assembly for the specimen.

The application provides a functionalized cage polysilsesquioxane toughened bismaleimide resin and a composite material thereof, a preparation method and an application, and belongs to the field of composite materials. The bismaleimide resin is modified by the functionalized cage polysilsesquioxane, and the resin with significantly improved strength and toughness and excellent thermomechanical properties is prepared. The interlaminar shear performance of the carbon fiber composite material with the resin as a matrix is significantly improved, and the carbon fiber composite material has a good application prospect in the fields of aerospace, electronic appliances, automobile industry and the like.

The application relates to the field of carbon fiber composites, and discloses a device for preparing a carbon fiber prepreg product and a carbon fiber product, wherein the device comprises a vacuum bag connected with a vacuum extraction assembly; the vacuum bag is internally provided with a product chamber and a fiber felt chamber which are in communication with each other; the carbon fiber prepreg product is arranged in the product chamber; and an activated carbon fiber felt assembly is arranged in the fiber felt chamber. The device can effectively reduce the porosity of the carbon fiber prepreg product and improve the bending strength and the interlaminar shear strength of the carbon fiber prepreg product.

This invention discloses a high-toughness, low-dielectric bismaleimide resin composition, a modified bismaleimide resin, its preparation method, and its applications. The bismaleimide resin composition comprises bismaleimide resin, an allyl compound, and a liquid rubber, wherein the liquid rubber contains end-capping groups capable of reacting with double bonds. This invention primarily addresses the problems of high dielectric constant, poor toughness, and poor interlaminar shear strength in existing bismaleimide resins. In this invention, the dielectric properties and toughness are improved by reacting the end-capping groups in the liquid rubber with the bismaleimide resin, while maintaining the mechanical properties and heat resistance essentially unchanged.

The application provides a high-performance insulating composite material and a preparation method and application thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: mixing an epoxy resin and a silane coupling agent solution to obtain a modified epoxy resin; mixing the modified epoxy resin and a curing agent to obtain an impregnation solution; performing thermal oxidation treatment on aramid fiber to obtain modified aramid fiber; performing ultrasonic impregnation on the modified aramid fiber in the impregnation solution to obtain aramid fiber prepreg; and performing layering and curing molding on the aramid fiber prepreg to obtain the high-performance insulating composite material. The preparation method provided by the application is simple in process, short in cycle and low in cost, the prepared composite material has high interlaminar shear strength and few internal defects, and is suitable for popularization and application in actual engineering.

The invention discloses a lightweight composite material plate for protecting ultra-high-speed fragments and a preparation method of the lightweight composite material plate. The plate is symmetrically provided with an ablation-resistant and shear-resistant layer, a support transition layer and a tough energy absorption layer from outside to inside, the supporting transition layer and the tough energy absorption layer are cured into a whole under the conditions that the temperature is 120-130 DEG C and the pressure is 10-20 MPa in the first-time mold pressing; primary melting is conducted at the temperature of 70-90 DEG C through secondary mold pressing, curing is conducted at the temperature of 100-110 DEG C, basalt fiber woven cloth is compounded to the outer side through an adhesive film under the pressure of 10-20 MPa, and the impact-surface-free distinguishing structure with the consistent front and back protection performance is formed. The problems that a traditional metal spacer armor is large in mass, limited in space and prone to reverse installation failure are solved, gradient energy consumption is achieved under 1500-3000 m / s ultra-high-speed fragment impact, the surface density is reduced by 18% or more, V50 is improved by 21% or more, the interlayer shear strength is improved by 25% or more, and the metal spacer armor is suitable for efficient protection of space limited equipment.

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

The present application relates to the field of nondestructive testing, and provides a composite laminated sheet interlaminar damage identification and failure determination method, comprising: collecting acoustic emission signals of a composite laminated sheet in a short beam shear test, and extracting amplitude intensity and peak frequency; classifying and identifying damage categories in an interlaminar shear failure process; calculating a relative cumulative count of acoustic emission signals of each damage, and synchronously calculating a load change increment, and constructing a relationship curve of both and time; determining a damage starting time according to an initial change feature point of the relationship curve relative to the cumulative count curve, and cooperatively determining an interlaminar shear failure point in combination with a mutation feature of the load increment curve, and outputting a failure point load value as a limit load of interlaminar shear strength. The present application also provides a device, equipment and medium applying the method. The present application effectively identifies damage modes and determines an interlaminar shear failure starting point, and accurately determines a shear strength of a laminated sheet.

The invention discloses a fiber-reinforced thermoplastic prepreg tape as well as an in-situ forming method and application thereof, and belongs to the field of manufacturing of high-performance composite materials. The method comprises the following steps: activating the to-be-treated surface of a fiber-reinforced thermoplastic prepreg tape base material, and heating to a set temperature below the melting point of matrix resin; uniformly spraying composite resin powder containing matrix resin powder and functional additive powder on the heated surface; and finally, hot-pressing fusion is conducted through a heating type extrusion roller set, the powder is fused and combined through the instantaneous temperature gradient, rapid cooling and shaping are conducted by means of the heat sink effect of the prepreg tape body, and therefore the functionalized gradient interface structure is constructed on the surface of the prepreg tape. According to the invention, the interlaminar shear strength and in-plane shear strength of a composite material product can be improved, the porosity is greatly reduced, and the industrial problems of excessive interlaminar pores and insufficient binding force during automatic laying caused by surface defects of the prepreg tape are effectively solved.

The application discloses a preparation method of a modified carbon fiber reinforced polyimide composite material, and comprises the following steps: (1) washing a carbon fiber cloth; (2) oxidizing the carbon fiber cloth: adding the washed carbon fiber cloth into a strong oxidant solution to modify the carbon fiber cloth; (3) preparing a modified coating: immersing the carbon fiber cloth in a silane coupling agent solution, and drying to obtain a modified carbon fiber cloth; and (4) preparing the composite material: sequentially layering polyimide films and the modified carbon fiber cloth in an ABAB...A order, with the polyimide films being A and the carbon fiber cloth being B, and placing the polyimide films and the modified carbon fiber cloth into a hot press to obtain the carbon fiber reinforced polyimide composite material. Through the oxidation treatment of the carbon fiber cloth by the strong oxidant, the surface roughness of the carbon fiber is increased, and the interfacial strength between the carbon fiber cloth and the matrix is improved by adding the silane coupling agent, so that the interlaminar shear performance and the impact performance of the material are greatly improved.

The invention relates to the technical field of stainless steel composite plate preparation, in particular to an acid and alkali resistant stainless steel composite plate and a preparation method thereof. The acid and alkali resistant stainless steel composite plate comprises a carbon steel surface layer and a modified stainless steel composite layer, wherein the thickness ratio of the carbon steel surface layer to the modified stainless steel composite layer is (7-9): (1-3); the modified stainless steel composite layer comprises a modified stainless steel interface layer, a modified stainless steel transition layer and a modified stainless steel surface layer, and the modified stainless steel interface layer contains 25-40 wt% of carbon steel powder; the modified stainless steel transition layer contains 5-20wt% of carbon steel powder; and the modified stainless steel surface layer contains 10-20wt% of nano silicon carbide. The carbon steel / stainless steel sintered rough blank is prepared in combination with the powder metallurgy technology, then the obtained carbon steel / stainless steel sintered rough blank is subjected to hot rolling and heat treatment, and the prepared finished stainless steel clad steel plate has good interlaminar shear strength and corrosion resistance.

The application relates to the technical field of carbon fiber preparation, and discloses a high-strength and high-modulus carbon fiber and a preparation method thereof. The method comprises pre-oxidation treatment of polyacrylonitrile-based original filaments; wherein the pre-oxidation treatment is provided with at least three temperature zones; in the first temperature zone, the ratio of the static value of the polyacrylonitrile-based original filament to the width of the polyacrylonitrile-based original filament is 0.005-0.032 V / mm. According to the method, the static value of the polyacrylonitrile-based original filament in the pre-oxidation process is controlled, high-strength and high-modulus carbon fibers are prepared, and the interlaminar shear strength of the composite material is high.

A method for modifying carbon fibers with multidimensional nanoparticles and its application in CF / PEEK composite materials. The present invention belongs to the field of carbon fiber modification and CF / PEEK composite material preparation. The purpose of the present invention is to solve the interface problem of CF / PEEK composite materials and improve the overall mechanical properties of the composite materials. The method of the present invention comprises the following steps: first, activating the desized CF fabric and then modifying it with PEI; then immersing it in a MXene suspension; and then immersing it in a dispersion of PEI-modified CB to obtain carbon fibers modified with multidimensional nanoparticles. The CF / PEEK composite material of the present invention can achieve a bending strength of 781.54 MPa and an interlaminar shear strength of 67.1 MPa. At the same time, its electromagnetic shielding performance in the X-band reaches 29.28 dB, and it has excellent comprehensive performance.

The invention relates to the technical field of numerical control, in particular to a real-time data driven cutting bed automatic control method and system and a storage medium. The method comprises the following steps: collecting dynamic stress data of a cutting bed cutter and microscopic deformation data of a fabric in real time through a multi-source sensing network, and constructing a physical coupling state space of the cutter and the fabric; according to the invention, through a collaborative optimization mechanism driven by multi-source sensing data, high-precision collaborative control of cutter dynamics and fabric deformation is realized in the field of cutting bed control, and through hardware synchronous triggering of the piezoelectric ceramic array sensor and the distributed optical fiber sensor, space-time alignment monitoring of cutter stress fluctuation and fabric interlayer shear deformation is realized. According to the design, the problem of time sequence mismatch of a traditional system in cross-scale data fusion is solved, the thermodynamic state of the cutter and fabric strain energy distribution form a computable incidence matrix, and a solvable space foundation of an optimization algorithm is laid.

The invention discloses a large-scale wind power blade carbon fiber pultrusion plate preparation method based on multistage gradient regulation and control, and the method comprises the steps: installing a required number of carbon fiber bobbins on a creel, leading out carbon fibers from the carbon fiber bobbins, and uniformly arranging the carbon fibers to form a carbon fiber yarn bundle layer; performing resin infiltration on the carbon fiber yarn bundle layer through three impregnation tanks with different viscosity gradients in sequence; preforming the resin-impregnated carbon fiber yarn bundle layer into a plate through a preforming mold, respectively covering the plate with demolding cloth, and feeding the plate into a forming mold; performing multi-stage gradient curing on the preformed plate to obtain a carbon fiber pultrusion plate; and cooling the carbon fiber pultrusion plate, and finally rolling or cutting the carbon fiber pultrusion plate. The preparation method can effectively solve the problems of low production efficiency, high porosity, insufficient interlayer shear strength and the like in preparation of the carbon fiber pultrusion plate.