1324 results about "Honeycomb structure" patented technology

An integrated carbon honeycomb structure material and its preparation method are disclosed, belonging to the field of carbon materials technology. Based on a co-sacrificial template low-temperature pyrolysis strategy, the target material can be obtained through three main steps: preparation of a metal salt-colloidal microsphere template precursor, precursor pressing and molding, and subsequent calcination and carbonization. This technology has the characteristics and advantages of simple preparation process, regular and controllable macroscopic structure of the sample (such as shape, area, and thickness), rich and tunable chemical composition, and three-dimensional interconnection of graphene carbon matrix. It has great application potential in many fields such as electrochemical energy storage, catalysis, gas separation, adsorption, and electromagnetic shielding.

An apparatus and a method are provided for a sports paddle for pickleball, tennis, smashball, ping pong, or racquetball. The sports paddle comprises a planar portion defining opposing flat surfaces for striking a ball and a handle portion for grasping in a hand. A skin layer encloses the planar portion and the handle portion. Rounded edges are disposed around the planar portion and the handle portion. The planar portion may comprise a core material surrounded by a rigid portion. The rigid portion may comprise 20-24 lb. foam while the core material is a honeycomb structured material. A synthetic or polymeric grip is wrapped around the handle portion to provide stability and firmness for a player. A binding secures the grip to a neck of the planar portion. An end cap placed at an end of the handle provides support and protection of the paddle.

The utility model discloses a mute floor which comprises a surface treatment layer, a protection layer, a decoration layer, a first carrier, a first buffer layer and a second carrier. The surface treatment layer is arranged on one side of the protection layer, the decoration layer is arranged on the other side of the protection layer, the first carrier is arranged between the decoration layer and the first buffer layer, the first buffer layer is arranged between the first carrier and the second carrier, and the first buffer layer is of a porous structure and / or a net structure. A buffer groove is formed in at least one side face of the first buffer layer and extends to the two ends of the side face. By arranging the floor with the first buffer layer with the porous and / or honeycomb structure, noise is reflected and refracted for multiple times in the porous and / or honeycomb structure, so that sound is attenuated, a sound wave propagation path is prolonged, and the effect of more effectively reducing noise propagation is achieved.

The invention discloses an energy-absorbing reinforced honeycomb structure with the Poisson's ratio capable of being adjusted positively and negatively and a design method, and relates to the field of honeycomb structures. Two horizontal outer ribs and four inclined outer ribs of the honeycomb structure form a hexagon; the two ends of the first arc-shaped inner rib are connected with the left upper vertex and the left lower vertex of the hexagon and are concave towards the left vertex of the hexagon; the second arc-shaped inner rib is connected with the right upper vertex and the right lower vertex of the hexagon and is concave towards the right vertex of the hexagon; two ends of one horizontal inner rib are respectively connected with the left vertex of the hexagon and the first arc-shaped inner rib, and two ends of the other horizontal inner rib are respectively connected with the right vertex of the hexagon and the second arc-shaped inner rib; and the circular ring is embedded in the convex parts of the two arc-shaped inner ribs. According to the honeycomb structure, the positive Poisson's ratio honeycomb and the negative Poisson's ratio honeycomb are fused through the two horizontal inner ribs, so that the inner ribs and the outer ribs are mutually balanced, the circular ring design is added, and the structural strength is improved; through the thickness parameter design of the inner ribs and the outer ribs, flexible transformation of the positive Poisson's ratio or the negative Poisson's ratio is achieved on the premise that light weight and high strength are guaranteed.

The invention relates to the technical field of river bank protection, in particular to a river bank slope protection for cofferdam construction and a construction method thereof. S2, construction of a near-water area structure; s3, construction of a far water area structure; s4, ecological enhancement; triple optimization of river bank protection is achieved through dynamic water level monitoring and modular design, a double-layer reinforced concrete and elastic sealant structure is adopted in a near-water area, the compressive strength is improved by 20%, the crack width is smaller than or equal to 0.2 mm, and material waste is reduced by 15% in cooperation with dynamic width adjustment (+ / -2 m); the mold bag concrete slope protection is combined with an atomization spraying system, the anti-scouring capacity reaches 5 m / (m.s), the vegetation coverage rate is larger than or equal to 80% within 3 months, and the water and soil loss rate is reduced by 70%; the modular honeycomb structure inflation assembly efficiency is improved by 40%, the transportation cost is reduced by 50%, the distributed sensors achieve structure displacement / pressure three-level early warning, the operation and maintenance cost is reduced by 70%, the overall service life is prolonged by more than 5 years, and an ecological-engineering collaborative protection system is formed.

The invention discloses a copper surface micro-etching coarsening solution for a fine circuit as well as a preparation method and application of the copper surface micro-etching coarsening solution, and relates to the technical field of printed circuit board manufacturing. The copper surface micro-etching coarsening solution for the fine circuit is prepared from, by mass concentration, 60 g / L to 100 g / L of sulfuric acid, 40 g / L to 60 g / L of hydrogen peroxide, 0.5 g / L to 2 g / L of zinc sulfate, 10 g / L to 30 g / L of copper ions, 0.5 g / L to 1 g / L of pyridine heterocycle-containing Schiff base, 10 g / L to 100 g / L of ethyl alcohol, 1 g / L to 3 g / L of 2-mercaptobenzothiazole, 1 g / L to 5 g / L of methionine and 1 g / L to 5 g / L of polyacrylamide. According to the copper surface micro-etching coarsening solution, the 2-mercaptobenzothiazole and the methionine in the copper surface micro-etching coarsening solution can enable the copper surface to form a honeycomb structure under the low micro-etching amount, the zinc sulfate and the pyridine heterocyclic ring-containing Schiff base can form a composite film layer with copper ions on the surface of the honeycomb structure, and the interlayer binding force is improved.

The invention discloses a compact phase change heat storage honeycomb structure heterogeneous metal microdroplet interactive printing forming method, and belongs to the field of metal additive manufacturing. According to the method, the characteristic that aluminum alloy and a phase-change material are a solubility gap system is utilized, a micro-droplet interactive printing forming method is adopted, and aluminum alloy micro-droplets and phase-change metal micro-droplet double nozzles are controlled to conduct collaborative printing by designing a honeycomb structure and planning a printing track, so that alternate deposition and space integration of a structural material and the phase-change material are achieved; therefore, the compact honeycomb metal phase change heat storage structure is prepared. Compared with a traditional method, the method has the advantages that high-density integrated printing forming of the aluminum alloy and the phase change metal heterostructure can be achieved without reserving a flow channel, an exhaust hole and a packaging auxiliary structure, the manufacturing process is simplified, meanwhile, the compactness and the overall sealing performance of the heat storage structure are remarkably improved, and the manufacturing cost is reduced. The problem of high-heat-flux heat management in a narrow space is solved.

The invention provides a solar cell and a photovoltaic module, and relates to the field of photovoltaic technology. The solar cell includes: a silicon substrate including a first surface and a second surface opposite to each other in a thickness direction of the silicon substrate; the first doping layer and the first passivation layer are sequentially arranged on the first surface; the first seed layer penetrates through the first passivation layer and is electrically connected with the first doping layer, the first base metal layer covers the first seed layer, the first base metal layer is electrically connected with the first doping layer through the first seed layer, and the first seed layer is of a honeycomb structure comprising a plurality of first holes; the first base metal layer comprises a plurality of first metal particles; an interface between the first base metal layer and the first seed layer includes a plurality of interface regions, and in a first interface region of the plurality of interface regions, the first metal particles are filled in the first holes. According to the invention, the cost of the battery is reduced, the conductivity, the drawing force and the structural stability of the electrode structure are improved, and recombination is reduced.

The invention relates to the technical field of biomechanical detection and automobile safety evaluation, and discloses an automobile collision dummy abdomen safety test device and method. The testing device comprises a human body feature modeling module which is used for establishing a target population abdomen parameterized model based on statistical analysis, determining a key size design domain covering target population percentile and constructing a target population metrology database; the abdominal mechanical property simulation module is used for obtaining a human tissue relative density distribution function based on the hyperelastic constitutive model, taking the density distribution function as an input parameter for manufacturing a gradient honeycomb structure and simulating human abdominal mechanical properties through relative density gradient distribution in the thickness direction; the multi-mode sensor integration module adopts a distributed intelligent sensing network architecture and is composed of a sensing layer, a transmission layer and a processing layer. By integrating pressure, deformation, acceleration and tissue stress sensors and combining a real-time feedback algorithm, collision parameters are dynamically optimized, and the test precision and the biological fidelity are improved.

A pickleball paddle includes a first padding, two second paddings, an edge strip, and a grip. The first padding is a honeycomb structure made of polypropylene. The second paddings are bonded to two opposite surfaces of the first padding, and the second paddings each have a polypropylene layer and a fiber fabric bonded to the polypropylene layer. The edge strip is connected to the edge of the first padding and the edges of the second paddings, and the edge strip is made of a material including polypropylene. The grip is connected to the edge strip, and the grip is made of a material including polypropylene. Thus, the pickleball paddle of the present invention is easy to recycle and can reduce harm to the environment. Additionally, the present invention further includes a method of recycling the aforesaid pickleball paddle.

The utility model belongs to the technical field of building materials, and relates to an anti-skidding and shock-absorbing mute composite floor which sequentially comprises a resin layer, a mute layer, a base material layer, a balance layer and a shock-absorbing layer from top to bottom. Wherein the mute layer is a cork layer, and the thickness of the mute layer is 2-4 mm; the base material layer is a plywood layer, and the thickness of the base material layer is 7-9 mm; the balance layer is a plywood layer, and grooves which are uniformly distributed in parallel are formed in the surface of the balance layer; the damping layer is a foaming material layer, the thickness of the damping layer is 4-6 mm, and the damping layer is provided with evenly-distributed air channels. The mute layer is made of cork, is light in density and has soft and elastic touch feeling, cells of the cork are of a honeycomb structure filled with gas, have low conductivity on heat, noise and vibration and have a synergistic effect with the foaming damping layer at the bottom, and the surface is coated with the anti-skid coating with good flexibility, so that the anti-skid damping mute floor has a good impact sound absorption effect; the impact absorption performance is excellent, the head injury evaluation value is low, and the protection and mute effects are achieved.

The invention discloses a novel bionic arc-shaped reinforced re-entry honeycomb structure and a platform stress theoretical model, and arc-shaped supports are embedded into traditional re-entry unit cells by utilizing a bionic principle to trigger coupling deformation of multiple plastic hinges, so that the strength, rigidity, stability and energy absorption of the structure are remarkably improved. A platform stress theoretical model of the novel structure is provided based on an energy conservation principle, so that the cost of time, workload and the like of numerical simulation and experiments in a preliminary optimization design stage of the structure is remarkably reduced. Under the parameters of the invention, the platform stress and the specific energy absorption of the reentrant honeycomb structure are up to 10.4 times that of the traditional reentrant honeycomb structure, the rigidity and the stability of the reentrant honeycomb structure are improved to 11.7 times and 1.7 times, and the stable deformation mode and the crushing force efficiency of the reentrant honeycomb structure are superior to those of the traditional reentrant honeycomb structure. The composite material is suitable for scenes requiring high energy absorption and stable impact resistance, such as the protection fields of equipment such as pier collision resistance, canal collision resistance gates, automobile collision resistance, aircraft wing buffer layers and run-flat tires in civil engineering.

The invention discloses a bionic heterogeneous composite structure bone implant and a preparation method thereof, and relates to the technical field of medical implants.The bionic heterogeneous composite structure bone implant comprises an inner-layer cross-shaped structure, a middle-layer negative Poisson's ratio structure and an outer-layer honeycomb structure, and the cross-shaped structure, the negative Poisson's ratio structure and the honeycomb structure jointly form a bionic composite structure; and immersing the bionic composite structure subjected to double-network crosslinking into a drug-containing solution for post-treatment and drug loading to obtain the bionic heterogeneous composite structure. According to the invention, bionic adaptation and intelligent optimization of mechanical properties are realized, and the stress shielding problem is solved; according to the invention, osseointegration and vascularization processes are obviously accelerated and enhanced, and leap-type improvement of biological activity is realized; a novel intelligent treatment mode based on in-vivo microenvironment response is developed, and on-demand and accurate drug delivery is achieved.

The invention discloses a honeycomb structure wave-absorbing composite material based on resistive films and a preparation method thereof. The honeycomb structure wave-absorbing composite material comprises a glass fiber board skin layer, a first resistive film layer, a first honeycomb dielectric layer, a second resistive film layer, a second honeycomb dielectric layer, a third resistive film layer and a metal backboard. All the layers are connected through a bonding layer. According to the honeycomb structure wave-absorbing composite material based on the resistive film and the preparation method thereof, the sheet resistance in the first resistive film layer, the second resistive film layer and the third resistive film layer is controllable and customizable, so that impedance matching can be regulated and controlled by regulating and controlling the sheet resistance gradient of the resistive film, the process parameters are more stable, the broadband (2-18GHz) wave-absorbing performance is good, and the application prospect is wide. The first honeycomb dielectric layer and the second honeycomb dielectric layer do not need secondary processing, so that the wave-absorbing performance is endowed, and the resistive film is easy to prepare; in addition, the wave-absorbing composite material prepared by the invention is thin in structural material thickness, light in weight, capable of effectively absorbing a wide frequency band and easy to process.

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a silicon dioxide-based adsorbing material as well as a preparation method and application thereof. The silica-based adsorption material provided by the invention comprises a matrix and polyethyleneimine loaded in the matrix, the matrix comprises silicon dioxide; the structure of the silicon dioxide-based adsorption material is a honeycomb cylindrical body; the silica-based adsorption material has a uniformly distributed pore structure, and the pore volume of the silica-based adsorption material is 0.08-0.36 cm < 3 > / g. The silica-based adsorption material provided by the invention has relatively large pore volume and relatively high amine loading capacity, and is beneficial to adsorption of carbon dioxide; meanwhile, the honeycomb structure is adopted, air can be guided to uniformly flow along the channels, pressure drop is reduced, the contact area with the air is increased, and adsorption of carbon dioxide is facilitated. The mechanical strength of the silicon dioxide-based adsorption material is improved by the uniformly distributed pore structure, and the industrial requirements can be met.

The invention discloses a single-stroke breakpoint-free path planning method for a 3D printing variable-wall-thickness honeycomb structure, and the method comprises the following steps: determining the stress distribution condition of an equal-wall-thickness honeycomb structure continuous carbon fiber reinforced silicon carbide ceramic-based composite material through software simulation, and determining a weakest region and a weakest region; variable-wall-thickness honeycomb printing is arranged in the weakest area and the weaker area; the side length and the offset distance of the honeycomb unit are determined, and a 3D printing path is set, specifically, the odd-number-layer path is different from the even-number-layer path, the outer contours of the honeycomb unit are sequentially printed in the vertical direction through the odd-number-layer path, the honeycomb unit does not completely pass through each honeycomb wall of the honeycomb structure, and the honeycomb structure is not completely formed after printing is completed; and when the next even-numbered layer is printed, missing honeycomb walls of the upper odd-numbered layer are passed twice, so that the missing honeycomb walls are complemented, and a complete variable-wall-thickness honeycomb structure is formed. According to the method, weak spots are effectively strengthened in a targeted mode, the material is not prone to damage, and the mechanical property is remarkably improved.

A lightweight panel for a vehicle includes a honeycomb part having a paper honeycomb whose interior is formed in a honeycomb structure and is machined to a predetermined thickness, a reinforcing layer including a reinforcing mat and a reinforcing resin, formed on each of upper and lower surfaces of the honeycomb part, and a plurality of concave portions formed in a lower surface of the honeycomb part.

The invention discloses a high-efficiency heat dissipation type switch cabinet, and relates to the technical field of switch cabinets, the high-efficiency heat dissipation type switch cabinet comprises a main body and a first assembly installed on the main body, the first assembly comprises a positioning shell used for assisting subsequent component installation, a through groove is formed in the middle of the positioning shell, and side cavities are formed in the four corners of an inner cavity of the positioning shell; a honeycomb plate A is slidably connected into the positioning shell; through the arrangement of the water collecting cavity, rainwater is collected, moisture prevention can be triggered, in the rain-free period, the rainwater stored in the water collecting cavity can be matched with the heat dissipation fins, the honeycomb plate A and other components in the main body to form a heat exchange loop, heat in the main body is in contact with the heat dissipation fins after rising, and the heat dissipation effect is improved. The honeycomb plate A and the honeycomb plate B above the main body transfer heat absorbed by the fins to rainwater by utilizing the high heat conduction characteristic of a honeycomb structure, the heat is taken away through natural evaporation of the rainwater, and the heat dissipation capacity in the absence of rain is enhanced by utilizing the specific heat capacity characteristic of the rainwater under the condition that no extra energy is consumed.

The invention discloses an SBS (styrene butadiene styrene) modified asphalt aging performance evaluation method, a prediction model and application, relates to a construction method of an SBS modified asphalt aging performance evaluation and prediction model based on multi-scale aging evaluation indexes, and aims to solve the problems that aging evaluation depends on a single-scale index and the prediction precision is insufficient in the prior art. The model is verified by accelerated aging data in a laboratory, the thermo-oxidative aging error is less than or equal to 9.4%, and the ultraviolet aging error is less than or equal to 7.5%. Engineering application: providing road maintenance period suggestions (for example, when the aging time is predicted to be 5 years, detection is recommended once every two years); triggering a material replacement threshold value when the number of honeycomb structures drops to 60% of the initial value; the performance recovery is realized by compounding the new asphalt and the regenerant (the mixing amount is 10-15%). Through multi-scale index collaborative analysis and data modeling, the aging prediction precision is significantly improved, and a scientific basis is provided for asphalt material life evaluation and road maintenance decision.

The thermosensitive crystal resonator comprises a base, a quartz wafer and a thermistor, the base comprises a base bottom plate, a base middle plate and a base wall which are sequentially arranged from bottom to top, an inner cavity is defined by the upper end face of the base middle plate and the inner wall of the base wall, an upper end opening of the inner cavity is sealed through an upper cover, and a lower end opening of the inner cavity is sealed through a lower cover. A center through hole is longitudinally formed in the middle of the upper end face of the base middle plate, a thermistor is installed in the center through hole, side edge through holes are formed in the positions, located on the two sides of the center through hole, of the upper end of the base middle plate respectively, embedded blocks are installed in the side edge through holes, a plurality of honeycomb holes are formed in the upper portions of the embedded blocks, and the honeycomb holes are filled with conductive buffer rubber. And the upper ends of the two embedded blocks are connected with a quartz wafer through conductive silver adhesive. By optimizing multiple designs of the base structure, the honeycomb buffer structure, the close-range thermosensitive compensation arrangement structure and the double-sealing structure, temperature compensation precision, stress buffer high efficiency and sealing performance long-term performance are achieved.

The invention belongs to the technical field of deep sea vibration and noise reduction functional shells, and particularly relates to a vibration and noise reduction composite pipe and a preparation method thereof.The vibration and noise reduction composite pipe comprises an outer layer, a middle layer and an inner layer which are sequentially connected together in a sleeved mode; the outer layer is a carbon fiber resin composite material pipe; the inner layer is a 316L stainless steel pipe; the middle layer is arranged between the outer layer and the inner layer and comprises a micro-perforated aluminum pipe, a Vonass flower basket imitating structure and a perforated aluminum pipe which are sequentially connected in a sleeved mode from outside to inside, and graphene epoxy resin is filled between the micro-perforated aluminum pipe and the Vonass flower basket imitating structure and between the Vonass flower basket imitating structure and the perforated aluminum pipe. According to the invention, through the application of the Vonass flower basket imitating structure and the micro-perforated aluminum pipe, the broadband sound absorption and noise reduction effect is obviously improved, the performance is excellent in the aspect of low-frequency noise absorption, and compared with a traditional honeycomb structure, the honeycomb structure has obvious advantages; the middle layer can absorb sound waves in the frequency range of 50-5000 Hz, and the low-frequency absorption efficiency is improved by 40%.

The invention belongs to the technical field of composite material processing, and provides a composite material supporting type honeycomb structure edge strengthening method, which comprises the following steps of: extracting characteristics of a honeycomb molded surface to be stabilized; designing and manufacturing a metal male mold matched with the honeycomb molded surface; carrying out process simulation calculation; paving, curing and post-processing the composite material frame; stabilizing a honeycomb slope; checking the honeycomb and the composite material frame; and laying an adhesive film according to a verification result, and curing and forming. The process problems of honeycomb edge slippage shrinkage, in-plane shrinkage, collapse and the like generated in the pressurizing and curing process of the high-chamfer honeycomb sandwich structure composite material part are solved, and stabilization of the high-chamfer honeycomb is achieved.

A vehicle humidity controlling system includes: an air conditioning duct through which air from a vehicle interior or a vehicle exterior can flow; a ventilation fan disposed in the air conditioning duct, the ventilation fan being capable of adjusting a flow rate of air flowing through the air conditioning duct; and a humidity controlling device including: a honeycomb structure having an outer peripheral wall and partition walls disposed on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells extending from a first end face to a second end face to form a flow path for the air; and a moisture absorbing layer formed on each surface of the partition walls, the humidity controlling device being disposed in the air conditioning duct on a downstream side of the ventilation fan.

The invention discloses a preparation method of an automobile energy absorption box filled with a bionic double-chiral structure, and relates to the technical field of automobile collision safety. The scheme that a traditional honeycomb structure is matched with a chiral structure is further optimized, bionic optimization design of the double-chiral structure is achieved and applied to the field of automobile energy absorption boxes, and three bionic optimization structures combining the double-chiral characteristics are established. And experiments prove that through the synergistic effect of the honeycombs and the double chiral units, the peak force of the energy absorption box in the initial collision stage can be effectively reduced, and meanwhile, the specific energy absorption is remarkably improved. Under the impact load effect, the structure shows a more stable and controllable deformation mode, the instability phenomenon of a traditional energy absorption structure is avoided, and an optimized solution is provided for automobile collision safety protection.

The invention discloses a supercapacitor with a honeycomb structure and a preparation method thereof, the supercapacitor comprises a positive current collector, a negative current collector and a honeycomb energy storage layer, and the positive current collector and the negative current collector respectively cover two opposite surfaces of the honeycomb energy storage layer; the honeycomb energy storage layer is formed by folding, stacking and fixing a plurality of composite films, each composite film comprises a first electrode layer, an electrolyte layer and a second electrode layer, and the first electrode layer, the electrolyte layer and the second electrode layer are sequentially stacked and are respectively compounded and fixed through a bonding layer. The preparation method comprises the following steps: firstly, sequentially compounding and fixing the first electrode layer, the electrolyte layer and the second electrode layer to form a composite membrane with a sandwich structure, coating an adhesive on the single side surface of each composite membrane at intervals, and then stacking and stretching a plurality of composite membranes to form a honeycomb core structure; after folding, a positive current collector and a negative current collector are compounded on the two sides of the honeycomb core structure. An energy storage structure and a force bearing structure are organically combined, and the energy storage performance and the mechanical performance are synergistically improved.

The application relates to the technical field of wave-absorbing composite materials, and particularly discloses a honeycomb sandwich structure high-temperature-resistant wide-frequency wave-absorbing composite material based on Ti3C2T x MXene aerogel and a preparation method of the honeycomb sandwich structure high-temperature-resistant wide-frequency wave-absorbing composite material, the honeycomb sandwich structure high-temperature-resistant wide-frequency wave-absorbing composite material is a multilayer structure, and from outside to inside, the multilayer structure comprises a high-temperature-resistant resin-based composite material wave-transparent skin, a honeycomb structure wave-absorbing layer and a high-temperature-resistant resin-based composite material reflecting skin in sequence, and the honeycomb structure wave-absorbing layer is a composite material honeycomb structure filled with a high-temperature-resistant MXene composite aerogel material.The honeycomb sandwich structure high-temperature-resistant wide-frequency wave-absorbing composite material based on Ti3C2T x MXene aerogel, which uses a MXene composite aerogel material (the density is 2 mg / cm 3 ~15 mg / cm 3 ) and a light composite material honeycomb structure carrier, overcomes the defect that existing wave-absorbing materials are large in density, and has an effective absorption frequency band width of more than 10 GHz when the reflectivity is lower than -10 dB, and can simultaneously meet the requirements of wide-frequency wave-absorbing performance and light weight of wave-absorbing materials for aerospace vehicle equipment.

The present application relates to the field of intelligent protection, and particularly relates to a 4D printing system and method of a bionic energy-absorbing honeycomb structure with adjustable configuration, which can consider deformation and efficient energy absorption when facing different collision conditions, fully protect the integrity of the passenger cabin or cargo cabin, and effectively reduce the injury of passengers or goods. The printing device contains a double-material extrusion system, a control system and a dynamic forming platform. The double-material extrusion system integrates a digital magnetic control system with an auxiliary magnetic field material extrusion system. In the printing process, by planning the printing path and applying a magnetic field, a patterned ferromagnetic domain pattern can be obtained while forming a complex honeycomb structure. Under the coupling effect of a high-frequency induction heater and a driving magnetic field, combined with the dynamic chemical properties of the base material, the obtained honeycomb structure can adjust the cell structure and material stiffness of the honeycomb material to cope with different collision conditions, realize active intelligent protection, and has great application potential in the field of transportation.

The invention discloses an energy absorption enhancement type lattice structure with the Poisson's ratio adjustable in all directions and a design method, and relates to the field of honeycomb structures. The method comprises the steps that S1, two-dimensional honeycomb structure cell elements with the Poisson's ratio capable of being adjusted according to the thicknesses of inner and outer ribs are constructed; s2, overlapping the two two-dimensional honeycomb structure cell elements in the in-plane direction at 90 degrees, and performing Boolean union intersection operation to obtain four three-dimensional honeycomb units; s3, sequentially connecting the four middle vertexes of each three-dimensional honeycomb unit to form a quadrilateral rib, sequentially connecting the upper vertexes of the four three-dimensional honeycomb units to form a quadrilateral rib, and sequentially connecting the lower vertexes of the four three-dimensional honeycomb units to form a quadrilateral rib to obtain a three-dimensional honeycomb structure cell element; s4, performing array to obtain a three-dimensional lattice structure; when being pressed in the in-plane direction, the two-dimensional honeycomb structure cell element shows the same Poisson's ratio polarity as the corresponding two-dimensional honeycomb structure cell element in the in-plane direction. According to the constructed two-dimensional honeycomb structure cell elements, the overall rigidity of the structure is improved, and a novel three-dimensional lattice structure with Poisson's ratio symbol anisotropy is generated through Boolean operation.

A pillar-shaped honeycomb structure, comprising an outer peripheral side wall; first cells having an opening on the first end surface and having a sealing portion on the second end surface; and second cells adjacent to the first cells with partition walls interposed therebetween and having a sealing portion on the first end surface and having an opening on the second end surface; wherein the outer peripheral side wall, the partition walls, and the sealing portions are fired, and comprise cordierite as a main component and one or more sintering aids selected from ceria, zirconia, and titania; wherein in the partition walls, assuming an average porosity of a portion in a range A, and a portion in a range B is P1 (%); and assuming an average porosity of a portion in a range C is P2 (%), −4≤P1−P2≤7 is satisfied.

The negative poisson ratio energy absorption device comprises a honeycomb structure formed by a plurality of unit cell structure arrays, and each unit cell structure is formed by combining a plurality of plane energy absorption units around the same central axis in a radial shape in a crossed mode. Each plane energy absorption unit comprises an inwards-concave negative Poisson's ratio structure, two bionic treetop structures symmetrically arranged on the upper side and the lower side of the inwards-concave negative Poisson's ratio structure in the axial direction, and two connecting rods horizontally extending from the left side and the right side of the inwards-concave negative Poisson's ratio structure to the outer side. The bionic treetop structure comprises an arc-shaped top and a plurality of supporting rods distributed in a fan shape, one end of each supporting rod is connected to the arc-shaped top, and the other end of each supporting rod is connected to the concave negative Poisson's ratio structure; the device has the advantages that the device can adapt to multi-angle impact, and efficient and uniform energy absorption and light-weight protection are achieved through the negative Poisson's ratio effect.