28 results about "Composite strength" patented technology

The invention discloses an automobile crash dummy skin material composite strength detection device and method, and relates to the technical field of material mechanics analysis, and the automobile crash dummy skin material composite strength detection device comprises a main body support unit, an impact unit, a stretching unit, an alignment unit and a control unit. The main body support comprises a cross beam, the impact unit is provided with an impact force regulation and control assembly with a punch, a clamping structure on the stretching unit is arranged on the cross beam, a two-dimensional translation sliding table bearing belt turntable is arranged below the cross beam, and the alignment system comprises a cross laser projector and a machine vision unit which are arranged on the cross beam. The height of the impact and stretching unit is adjusted by adjusting the height of the cross beam, the impact force is accurately adjusted by the impact unit, and the dynamic force sensor collects mechanical data in real time; and the stretching unit feeds back adaptive clamping force by means of a multi-force sensor, so that the result is prevented from being influenced. The alignment system realizes translation and rotation of a sample through a two-dimensional translation sliding table and a turntable, and laser positioning and machine vision precise position control are combined, so that the dispersion is reduced. The device can accurately detect the impact and tensile composite strength of the polyurethane material, reduce manual intervention and shorten the test time.

The utility model discloses a heat-insulating anti-aging hose, which belongs to the technical field of hoses and comprises a lining layer, a reinforcing layer, a heat-insulating layer and a protective layer which are sequentially wrapped and fixed from inside to outside. The heat insulation layer is formed by winding and coating an aerogel felt tape outside the reinforcing layer, the aerogel felt tape comprises an aerogel body and a connecting body, and the aerogel body is fixedly connected with the connecting body. The heat insulation layer of the hose is high in composite strength and not prone to delaminating, the heat insulation effect can be effectively achieved for a long time, and the service life of the heated radiation pipe body can be prolonged.

The utility model relates to the technical field of fabric compositing, in particular to a composite structure for enhancing fabric compositing strength, which comprises a first unwinding component and a second unwinding component. A first fabric unwound by the first unwinding assembly and a second fabric unwound by the second unwinding assembly sequentially enter the compounding assembly and the drying oven and then are wound by the winding assembly, and the spraying assembly is arranged on the upper side of the first fabric between the first unwinding assembly and the compounding assembly. A first box body is arranged on the lower side of the first fabric between the spraying assembly and the compounding assembly, a first negative pressure opening is formed in the upper end face of the first box body, a second box body is arranged on the upper side of the second fabric between the compounding assembly and the drying oven, a second negative pressure opening is formed in the lower end face of the second box body, and extraction openings are formed in the first box body and the second box body; according to the air suction device, the permeation of an adhesive to the fabric can be effectively enhanced, and the composite strength of the fabric is enhanced.

The invention provides a composite material strength parameter inversion method considering an in-situ effect in an ultralow-temperature environment, and the method comprises the steps: obtaining the elastic section test data of a composite material one-way plate and a composite material laminated plate in the ultralow-temperature environment, and employing a composite material finite element model and a particle swarm optimization (PSO) algorithm, taking consistency of a response value of finite element simulation of the composite material and strain response of an elastic section measured by a test as a target, performing inversion to obtain constitutive parameters of the composite material, and establishing a progressive failure model of the composite material in combination with a failure criterion of the composite material and a rigidity degradation model; and finally, according to test data of the damaged sections of the composite unidirectional plate and the composite laminated plate, a composite progressive failure model and a PSO optimization algorithm are adopted, and composite strength parameters are obtained through inversion. The method solves the problem that the strength parameters of the composite material considering the in-situ effect are difficult to accurately obtain in the ultralow-temperature environment, is convenient to operate and accurate in parameter obtaining, can be repeatedly applied, and is used for simulation modeling, strength evaluation and the like of the composite material.

The application provides a paper-plastic sealing film and a preparation method and application thereof, and relates to the technical field of sealing films.The preparation method of the paper-plastic sealing film comprises the following steps: S1, a single-component polyurethane adhesive is coated on one side of a paper base layer to form a first adhesive layer, a printing layer is first combined with the first adhesive layer, winding is performed, and first aging is performed; S2, a single-component polyurethane adhesive is coated on the other side of the paper base layer to form a second adhesive layer, a polyester film layer is secondly combined with the second adhesive layer, winding is performed, and second aging is performed; and S3, a two-component polyurethane adhesive is coated on the side of the polyester film layer which is not combined to form a third adhesive layer, a polyolefin film is thirdly combined with the third adhesive layer, winding is performed, and third aging is performed.The paper-plastic sealing film prepared by the method has the advantages of improved flatness, excellent composite strength, no delamination, and no bubbles after heat sealing.

The invention belongs to the technical field of self-heating products, and particularly relates to a self-heating membrane core which is stable in heating and long in duration and a preparation process of the self-heating membrane core. Comprising the following steps: filling modified polytetrafluoroethylene with magnetic particles; preparing a shell-core fiber water guide agent; preparing a self-heating sheet core; preparing a heat-stabilizing electrolyte, guiding current, and pressing the self-heating sheet. According to the method, magnetic particle filling modified polytetrafluoroethylene is prepared and serves as a binder of the spontaneous heating sheet, and high shearing force is applied to the magnetic particle filling modified polytetrafluoroethylene for fibration by controlling the rotating stirring speed and the magnetic field size of a high-speed airflow shearing machine; according to the preparation method, polytetrafluoroethylene can fully construct a strong and continuous three-dimensional fiber network, all active substances, conductive agent particles and the like are firmly wrapped in the three-dimensional fiber network, and the prepared self-heating sheet core is high in composite strength and has good heating stability and heating durability.

The present application relates to copper-aluminum composite plate strip technical field, especially a kind of copper-aluminum composite plate strip and production method, it is made of aluminum material and copper material composite, the oxygen content of copper material is 50ppm-500ppm, production method includes oxygen-increasing treatment to red copper or oxygen-free copper, the present application reduces the recrystallization temperature of copper material by increasing the oxygen content in copper material, in turn reduces annealing temperature, copper-aluminum composite blank heat treatment below 300 DEG C can satisfy copper material complete recrystallization, realize soft annealing, meet the demand of bending, while reducing the thickness of copper-aluminum intermetallic compound in heat treatment process, improve the composite strength of copper-aluminum composite plate strip.

The utility model relates to the technical field of aluminum-clad copper, in particular to an aluminum-clad copper composite plate strip with a stable structure, which comprises an aluminum strip and a copper strip, a groove is arranged on the aluminum strip, the copper strip is composited in the groove, a composite surface is arranged between the aluminum strip and the copper strip, the composite surface comprises a composite side surface and a composite bottom surface, and the composite surface further comprises an arc transition surface. And the arc transition surface is arranged at the intersection of the composite side surface and the composite bottom surface. The arc transition surfaces are arranged at the intersections of the composite side surfaces and the composite bottom surface, so that the stress is reduced, the aluminum-clad copper composite plate strip is not easy to break, the composite strength is improved, and the structural stability of the aluminum-clad copper composite plate strip is improved.

The invention discloses a production method of a high-composite-strength BOPA film. The BOPA film comprises a surface layer, a middle layer and an inner layer, and the surface layer is composed of PA6, melamine cyanurate, magnesium silicate, polytrimethylene terephthalate, POE-g-MAH and an antioxidant; the middle layer is composed of PA10 and PA12, multi-walled carbon nanotubes, pentadecyl phenol and surface modified cuprous oxide; the inner layer is prepared from PA6, glass fibers, phenolic resin, hollow glass beads, halloysite, an antioxidant and silicone. The BOPA film disclosed by the invention has relatively good composite strength.

The application provides a preparation method of a multilayer lateral composite strip for a fuse, and specifically comprises the following steps: vacuum smelting and pouring oxygen-free copper into a plate with N square grooves, then putting silver blocks into the square grooves, heating under a protective gas, and then hot pressing by an extruder; then heating under a protective gas, opening and breaking by concave-convex rollers, milling off the upper and lower surfaces, and finishing rolling to a finished product. The square groove structure can accurately position the silver layer, save noble metals to the maximum extent, and ensure that the circuit protection equipment is cut off when an abnormal current appears in the circuit; through the concave-convex roller rolling composite, the problem of cracks generated between the silver and copper interfaces and the poor lateral bonding strength can be effectively solved, so that the bonding strength is firm and reliable, the lateral composite strength is high, and the yield is high. Moreover, the strip manufactured by the method has stable performance and can be mass-produced.

This utility model relates to a feather structure for use in badminton shuttlecocks, belonging to the field of badminton technology. The utility model includes feathers, reinforcing ribs, a porous structure, and an M-shaped structure. The feathers employ a multi-layer composite structure, with transverse, oblique, or mesh-like reinforcing ribs between the layers, covering the main body of the feathers. Each individual feather has a porous structure on one side, and the feathers are M-shaped, forming an angle of 0.1-3°. This utility model features a simple and reasonable structural design, is stable and reliable, lightweight, high-strength, flexible, environmentally friendly, and has good composite strength, meeting usage requirements.

Systems and methods for the determination of a health index associated with an overhead electrical cable having a fiber-reinforced composite strength member and an electrical conductor surrounding the fiber-reinforced composite strength member. Operational data is collected from the electrical cable during operation of the cable and that data is utilized to update the health index over time. The updated health index may be utilized to estimate the remaining useful lifetime of the overhead electrical cable on a continuous basis.

The application relates to the technical field of composite materials, in particular to a composite material capable of keeping the golden appearance of basalt fibers, a preparation method and application thereof. The composite material provided by the application can keep the golden appearance of basalt fibers for a long time and is favorable for the popularization and application of basalt fibers in the fields of automobile interior parts and bags, because the transparent thermoplastic material contained in the composite material can improve the discoloration problem. In addition, the thermoplastic material is added to improve the problems of poor discoloration and poor composite strength, and the process conditions are controlled in the preparation process to improve the discoloration problem, so that the finally-prepared composite material has good durability and does not discolor for a long time. The composite material also has the advantages of environmental protection in the preparation process and simple preparation method.

The utility model provides a special-shaped copper strip for preparing an embedded groove copper-aluminum composite strip, and relates to the field of copper-aluminum composite materials. When the special-shaped copper strip is observed from the section direction, the upper plate surface is a convex arc surface, and the lower plate surface is a plane or a concave arc surface; a plurality of caulking grooves are formed in the lower plate face side by side, the groove bottom face of each caulking groove is a concave arc face, and at least one of the two groove edge faces of each caulking groove inclines outwards. After the special-shaped copper strip is cast and rolled, the groove bottom angle and the groove top angle of the caulking groove can be obtuse angles, so that the stress generated in a corner area when molten aluminum is solidified is reduced, and the anti-stripping performance of the copper-aluminum composite strip is effectively improved. The upper plate surface of the special-shaped copper strip is the convex cambered surface, and when the special-shaped copper strip is subjected to cast-rolling compounding with molten aluminum, firstly, a casting roller can generate larger rolling force at the caulking groove part, so that the compounding strength of the molten aluminum at the caulking groove part is favorably improved; and secondly, a rolling deformation part firstly appears at a part with a higher convex cambered surface and then extends towards two sides, so that the composite strength of the lower plate surface, the caulking groove and molten aluminum is improved.

The utility model belongs to the technical field of EPE pearl wool compositing, and particularly relates to an EPE pearl wool compositing device which comprises a base, two sets of dust collection hoppers are installed on a first support, dust collection grooves are formed in the dust collection hoppers, material guiding pipes are installed on the side walls of the two sets of dust collection hoppers, a dust collection box is installed at the other ends of the material guiding pipes, and the dust collection grooves are communicated with the dust collection grooves. A dust collection box is placed in the dust collection box, an exhaust box is installed on the side wall of the dust collection box, exhaust grooves are formed in the two side walls of the exhaust box and the side wall of the dust collection box, two pieces of EPE pearl wool pass through the two dust collection hoppers, impurities and air on the EPE pearl wool are sucked into the dust collection hoppers together and then enter the dust collection box of the dust collection box from a material guide pipe, and then the impurities and the air in the EPE pearl wool pass through the two dust collection hoppers. Impurities are intercepted by a filter plate on the side wall of the dust collection box, and clean air is discharged from an exhaust groove, so that the impurities on the surface of the EPE pearl wool are cleaned, the influence of the impurities on the composite strength of the EPE pearl wool is avoided, the cleanliness of the EPE pearl wool is favorably improved, and the composite strength of the EPE pearl wool is favorably improved.

The utility model relates to the technical field of membrane cloth, in particular to strong composite membrane cloth and a locally reinforced facial mask.The strong composite membrane cloth comprises a base layer, a surface layer and a middle composite layer, the middle composite layer comprises a burr fiber layer, and a plurality of irregular hairs are arranged on the two sides of the burr fiber layer. The utility model aims to solve the problems that the edge of the composite layer of the existing composite membrane cloth is easy to rise or warp or fall off, so that a very good attaching effect cannot be achieved, and the composite membrane cloth disclosed by the utility model has the advantages of high interface bonding strength, good composite strength and difficulty in layering and edge warping.

The invention discloses a high-strength bolt composite strength reliability design method. The method comprises the steps that basic parameters of high-strength bolt composite strength reliability design are obtained; establishing a strength reliability judgment criterion based on the nominal yield strength and the composite limit stress; constructing and fitting a probability density function of stress Weibull distribution and strength normal distribution; calculating mathematical expectations and standard deviations of stress and strength of the high-strength bolt in a dangerous bearing state; establishing a composite strength reliability model of the high-strength bolt, and calculating the composite strength reliability of the high-strength bolt; constructing a connection equation under the composite strength reliability model; and comparing the obtained reliability with the threshold value requirement, and if not, turning to design optimization until the strength reliability requirement is met. According to the method, the nominal yield strength and the composite limit stress of the bolt are considered, the forward design method of the diameter of the bolt is provided, and the method has the advantages of being high in applicability, practicability and accuracy.

The present application relates to the field of aluminum composite panel, especially to a hollow skeleton aluminum composite panel preparation method, comprising: completing punching of galvanized steel plate; when the preparation of punched steel plate is determined to meet the preset standard according to the average value of the edge protrusion height of punching, completing cleaning and double-sided glue spraying of punched steel plate in sequence; when the preparation of punched steel plate is determined not to meet the preset standard according to the average value, additional determination is made on whether the preparation of punched steel plate meets the standard, or the reason for not meeting the preset standard is determined according to the punched edge characteristic value; the two glue spraying surfaces of punched steel plate are compounded with aluminum plate; low amplitude cracking angle and high amplitude cracking angle are obtained respectively; when the preparation of hollow skeleton aluminum composite panel is preliminarily determined not to meet the preset standard based on the low amplitude cracking angle, the process optimization mode is determined according to the effective bonding area proportion, or whether the preparation of hollow skeleton aluminum composite panel meets the preset standard is verified according to the high amplitude cracking angle, thereby improving the composite strength of hollow skeleton aluminum composite panel.

The application provides a high-strength and permeability-maintaining composite geotextile and a low-damage manufacturing method and device, and the high-strength and permeability-maintaining composite geotextile comprises a spun geotextile layer and a short-fiber needled geotextile layer, and the two are bonded through a discrete hot-melt adhesive point array, the adhesive point coverage rate is 20%-35%, and a continuous water-permeable channel is formed between the adhesive points. In the hot-melt adhesive, 2-6% of plant fibers, 1-3% of glass fiber composite materials and 1-2% of polyester fibers are mixed in percentage by mass, and (plant fibers + glass fiber composite materials) / polyester fibers=2-8. The high-strength and permeability-maintaining composite geotextile and the low-damage manufacturing method and device can ensure high composite strength, zero base material damage and water permeability reservation when the high-strength and permeability-maintaining composite geotextile is prepared.

This utility model relates to a badminton shuttlecock, belonging to the technical field of badminton shuttlecock design. The utility model includes a shuttlecock head, high-density coils, and several sets of feather structures. Several sets of feather structures are installed on the inner side of the shuttlecock head. Each set of feather structures includes matching feather blades and feather shafts. Each feather shaft has feather blades on its surface. The feather shafts are fixed together by multiple high-density coils. This utility model features a simple and reasonable structural design, is stable and reliable, lightweight, high-strength, flexible, environmentally friendly, and has good composite strength, meeting usage requirements.

The application is suitable for the field of composite non-woven fabric processing, and provides a composite non-woven fabric hot rolling and film coating device, which comprises a workbench, the workbench is fixedly connected with a hot pressing box, one side of the hot pressing box is provided with a support frame A, the support frame A is connected with two discharging machines for discharging non-woven fabric and film, a corona mechanism is arranged between the discharging machine and the hot pressing box, the corona mechanism is used for corona treatment of the non-woven fabric and the film, and the other side of the hot pressing box is connected with a material collecting machine for winding through a support frame C. The application solves the problem of weak interfacial bonding force caused by uneven temperature distribution in the non-woven fabric film coating process, effectively inhibits the wrinkle defect caused by the shrinkage of the material under the action of heat. Through the synergistic effect of bidirectional gradient heating and stretching, the uniformity of the combination of the film and the non-woven fabric is improved, and the composite strength of the edge region of the wide material is also enhanced.

The application relates to the field of composite non-woven fabrics, and discloses a preparation method of a wet spunlace non-woven fabric composed of cotton gauze and pulp. The wet spunlace non-woven fabric comprises cotton gauze and a wet fiber layer which are intertwined with each other, and the preparation method comprises the following steps: disintegrating natural cellulose fiber pulp to obtain a fiber suspension; wet laying the fiber suspension to obtain a wet fiber web; laminating the wet fiber web and the cotton gauze, and pre-spunlacing to obtain a pre-spunlace composite fabric; front spunlacing the pre-spunlace composite fabric with 4-6 decreasing pressure channels, and then back spunlacing for 0-2 channels to obtain a spunlace composite fabric; and drying the spunlace composite fabric to obtain the wet spunlace non-woven fabric composed of cotton gauze and pulp. The natural cellulose fiber pulp is combined with the cotton gauze, and a special spunlace process is adopted, so that the composite strength between the cotton gauze and the wet fiber layer can be improved, and the obtained wet spunlace non-woven fabric has a small difference between two sides.

The application relates to the technical field of shearing test, in particular to a composite material strength testing device which comprises a tester, a moving platform arranged on the tester and used for moving up and down to perform test, a base mounted on the bottom end of the tester through bolts, an L-shaped plate fixedly connected to the top end of the base, and a right-angle plate with an inclined surface arranged below the moving platform. The device is provided with a plurality of clamping blocks and T-shaped rods, and only needs to cut the composite material into a specified strip, clamp the strip on the clamping seat, clamp and isolate the test block into multiple sections under the action of the clamping blocks, then drive the moving platform and the right-angle plate to move downward under the action of the tester, and drive the plurality of T-shaped rods to insert into the through grooves one by one to perform shearing test on the composite material test block, so that multiple shearing tests can be completed at one time of clamping, the manpower and time for repeated clamping, positioning and measurement are saved, positioning errors caused by multiple clamping are avoided, and data consistency and test efficiency are improved.

The invention relates to the technical field of bridge structure design and evaluation, in particular to a shear bearing capacity calculation method suitable for a pre-tensioning method prestressed concrete beam. The method comprises the following steps: firstly, determining reinforcing steel bar bolt pin force, the horizontal projection length c of a main inclined crack and the stress of all steel strands intersected with the inclined crack; further calculating the concrete pressure stress of the shear pressure area; then calculating shear stress of the concrete in the shear-compression area through a shear-compression composite strength calculation formula of the concrete in the shear-compression area; and finally, calculating the shear bearing capacity based on the parameters. The method provided by the invention can be suitable for shear resistance design and evaluation of newly-built and in-service bridges, and has the advantages of high precision, strong applicability and the like.

The application discloses a kind of composite strength detection device and method of car crash dummy skin material, it is related to material mechanics analysis technical field, including main support, impact, tension, alignment and control unit.Main support contains crossbeam, impact unit is equipped with impact force regulating component with punch, the clamping structure on the tension unit is installed in crossbeam, two-dimensional translation slide platform is supported with turntable under crossbeam, alignment system contains cross laser projector and machine vision unit on crossbeam.Impact and tension unit height is regulated by adjusting crossbeam height, impact unit accurately adjusts impact force, dynamic force sensor real-time collection mechanics data;Tension unit is adapted to adjust clamping force by multiple force sensor feedback, to avoid affecting result.Alignment system realizes sample translation and rotation by two-dimensional translation slide platform and turntable, combined with laser positioning and machine vision accurate control position, and dispersion decreases.The device can accurately detect the impact and tensile composite strength of polyurethane material, reduce manual intervention and shorten test time.

The invention relates to the technical field of turbine structure testing, and discloses a turbine rotor connection structure tension-torsion composite strength testing system, which comprises a torsion test bench, a strain detection device, a movable pulley stretching device and a tension-torsion composite tool fixture, and is characterized in that the movable pulley stretching device comprises a pulley block, a pulley bracket, a counterweight unit, a vertical plate and a sliding unit; the vertical plate and the pulley support are arranged adjacently and move horizontally through the sliding unit, and the tension-torsion composite tool clamp comprises a first torsion connector, a second torsion connector, a first tension-torsion combined chuck, a second tension-torsion combined chuck and a load transmission unit. A to-be-detected connecting structure is clamped between the first tension-torsion combined chuck and the second tension-torsion combined chuck, an extension part of the to-be-detected connecting structure is inserted into the load transmission unit, the strain detection device is arranged on the to-be-detected connecting structure, and a tensile load is applied to the to-be-detected connecting structure through cooperation of the counterweight unit and the pulley block. And applying a torsion load to the to-be-tested connection structure through a torsion testing machine of the torsion test bench.

The present application relates to the technical field of non-woven fabrics, and discloses a wet spunlace non-woven fabric of fine denier cellulose fiber composite polyamide multifilament and a preparation method and application thereof, the non-woven fabric comprising a polyamide multifilament layer and fine denier cellulose fiber layers arranged on the upper and lower layers of the polyamide multifilament layer; the polyamide multifilament layer is wound into a surrounding ring in a relaxed state in units of multifilament, and single multifilament is used to connect the surrounding rings in X-shaped lines between adjacent surrounding rings in the transverse direction, the surrounding ring is in the upper layer, and the X-shaped connection multifilament is in the lower layer, forming a double-layer skeleton structure. The polyamide multifilament is used as a skeleton material, more pore spaces are provided, fine denier cellulose fibers are laid on the upper and lower layers of the polyamide multifilament and are spunlaced with the polyamide multifilament, entanglement points are promoted to form, the composite strength between layers is increased, and the liquid absorption, liquid conductivity, liquid release and softness of the composite material are improved.

The application discloses a kind of based on wrapping ultra-high molecular weight polyethylene fire hose and manufacturing method, belong to fire equipment material field.The fire hose includes: the ultra-high molecular weight polyethylene filament is used as core yarn and outer wrapping yarn and is combined by wrapping spinning process, as warp yarn;Ultra-high molecular weight polyethylene filament is twisted into weft yarn;Warp yarn and weft yarn are woven into tubular fabric layer, TPU lining hose is inserted into the tubular fabric layer, and heat composite process is carried out by steam pressurization heat composite process, and the polyester wrapping ultra-high molecular weight polyethylene fire hose is obtained.Not only significantly improve the wear resistance and structural stability of fabric, but also improve the adhesion strength and fatigue stability between outer wrapping yarn and TPU lining hose by structure fluctuation and mechanical embedding effect, effectively solve the combination difficulty problem existing in the combination of ultra-high molecular weight polyethylene fiber and other polymer matrix, ensure the interlaminar composite strength, and the processing technology is simple, and the required cost is not high.