196 results about "Bending fatigue" patented technology

A method for improving the fatigue performance of a titanium alloy seamless tube. The method comprises: S1, mixing raw materials, pressing same into a plurality of electrode blocks, and welding the plurality of the electrode blocks to obtain a consumable electrode; S2, smelting the consumable electrode 2-3 times by using a vacuum consumable electrode arc furnace, so as to obtain a titanium alloy cast ingot; S3, upsetting and drawing the cast ingot multiple times and rolling same into a titanium alloy bar; S4, subjecting the bar to precision forging, with the amount of times of heating being no more than twice; S5, annealing and straightening same, followed by turning and drilling treatments, so as to obtain a rough blank of a titanium alloy seamless tube; S6, subjecting same to multi-pass cold rolling, so as to obtain a semi-finished titanium alloy seamless tube product; S7, performing vacuum annealing and acid pickling; S8, performing electrolytic-magnetic composite polishing; and S9, performing a shot blasting treatment. The method can effectively improve the rotating bending fatigue performance, and the titanium alloy seamless tube can endure 20 million test cycles.

The invention provides a cable bending fatigue life prediction method and system based on reinforcement learning, and relates to the technical field of cable life prediction, and the method comprises the steps: collecting cable test sample data, calculating a stress distribution field and a strain distribution field, constructing a stress intensity factor calculation module, and calculating a crack propagation track and rate. A damage evolution tensor is constructed as a state feature, a network is trained based on a deep Q learning algorithm, uncertainty is quantified by adopting a Markov chain Monte Carlo method, and a credible interval and an early warning threshold are established.

The invention relates to the field of mechanical engineering, in particular to a multilevel screening speed reducer tooth matching method based on a standardized box body, which comprises the following steps of: acquiring basic parameters of an input gear speed reducer and parameters of each transmission stage, and acquiring derived parameter limit ranges of the basic parameters and the parameters; screening out a tooth matching scheme meeting user input constraint conditions, marking the tooth matching scheme as a candidate set # imgabs0 #, screening a serializable scheme based on general requirements of a serialized speed reducer on a final-stage gear pair, marking the serializable scheme as a candidate set # imgabs1 # on an existing standardized box body, designing a transmission system, and checking through tooth root bending fatigue strength to obtain a final-stage gear pair final-stage gear pair; and marking the tooth matching schemes meeting the strength requirement as a candidate set # imgabs2, performing serialized screening again based on the general requirement of the serialized speed reducer on the final-stage gear pair, and marking the schemes meeting the serialization as a final candidate set C1. According to the multi-layer screening mechanism, the tooth matching scheme meeting the strength requirement is rapidly matched for the serialized speed reducer.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

To provide a component that enables suppression of strength degradation in an excess carburized portion, including degradation of impact resistance and bending fatigue characteristics.SOLUTION: A vacuum carburizing steel containing, in mass%, C: 0.15-0.30%, Si: 0.70-1.20%, Mn: 0.90-3.00%, Cr: 0.50-1.50%, Mo: 0.10-1.00%, Al: 0.020-0.050%, Nb: 0.020-0.100%, and N: 0.0100-0.0300%, the balance being Fe and unavoidable impurities, wherein P and S among the unavoidable impurities satisfy P: 0.030% or less and S: 0.030% or less, and formulas A, B, C, and D: A: 0.12≤3[Al]+4[Nb]≤0.50, B: 0.20≤[N] / [Al]≤0.80, C: 5.0≤3[Si] / 0.5[Cr], D: 1.95≤-2[Si]+3[Mn]+[Cr]+2[Mo], are all satisfied.SELECTED DRAWING: Figure 1

The present invention relates to the field of electronic engineering technology, and particularly to a method, system and medium for predicting the dynamic bending fatigue life of a circuit board. The method includes the following steps: obtaining circuit board dynamic bending condition data, and performing a circuit board dynamic bending test according to the circuit board dynamic bending condition data, so as to obtain circuit board dynamic bending test data; extracting circuit board test material characteristics according to the circuit board dynamic bending test data, so as to obtain circuit board test material data; performing circuit board dynamic bending analysis according to the circuit board test material data, so as to obtain circuit board material dynamic bending data; extracting circuit board thickness characteristics and circuit board layer number characteristics according to the circuit board dynamic bending test data, so as to obtain circuit board thickness data and circuit board layer number data. The present invention improves the accuracy of predicting the dynamic bending fatigue life of a circuit board based on electronic engineering technology.

The invention relates to the technical field of flexible connecting pipelines, and discloses an asymmetric net sleeve metal hose and a forming method thereof.The asymmetric net sleeve metal hose comprises a corrugated pipe, the two ends of the corrugated pipe are fixedly connected with connecting pipes correspondingly, the outer side of the corrugated pipe is wrapped with a woven net sleeve, and the two ends of the woven net sleeve are fixedly connected with connecting rings correspondingly; the connecting ring is fixedly connected with the connecting pipe, and the woven mesh sleeve is of an unbalanced woven structure. The bending fatigue life of the metal hose is prolonged, the minimum bending radius is reduced, the self-supporting capacity of the metal hose in the specific direction is improved, and the application range of the metal hose is expanded.

The utility model relates to the technical field of cable processing, and belongs to a cable fatigue detection device. Comprising a workbench, the workbench is provided with a first mounting base and a second mounting base, the first mounting base is provided with a first clamping assembly, the second mounting base is provided with a torsion mechanism, the torsion mechanism comprises a torsion disc, and the torsion disc is provided with a reciprocating bending mechanism; the reciprocating bending mechanism comprises a reciprocating driving assembly and a second clamping assembly. The torsion of the to-be-tested cable can be realized through the torsion mechanism, the torsion fatigue strength of the cable can be detected, the reciprocating bending of the to-be-tested cable can be realized through the reciprocating driving assembly, the bending fatigue of the cable can be detected, multiple detections can be realized through a single device, and the detection efficiency is improved. The functionality of the device is improved, and the detection efficiency is improved.

The invention discloses a method for improving the rotating bending fatigue strength of an AlCoCrFeNi 2.1 eutectic high-entropy alloy, and belongs to the technical field of alloys. According to the method, the AlCoCrFeNi 2.1 eutectic high-entropy alloy is treated by utilizing an ultrasonic surface rolling process (USRP), so that the density of surface defects and holes of the AlCoCrFeNi 2.1 eutectic high-entropy alloy is effectively reduced, and the rotating bending fatigue strength of the AlCoCrFeNi 2.1 eutectic high-entropy alloy is improved. And meanwhile, the surface roughness is reduced, the surface structure morphology is changed, the crack propagation path is prolonged, and finally the purpose of improving the fatigue performance of the AlCoCrFeNi 2.1 eutectic high-entropy alloy is achieved. According to the method, the surface structure of the AlCoCrFeNi 2.1 eutectic high-entropy alloy can generate residual compressive stress under the action of high-frequency vibration and static-load rolling of the USRP, so that the initiation time of fatigue cracks is effectively prolonged, and the fatigue performance of the AlCoCrFeNi 2.1 eutectic high-entropy alloy is enhanced.

The high-strength steel sheet has a chemical composition with MSC value in the range of 2.7% to 3.8% by mass defined by a specific formula, wherein the high-strength steel sheet has a microstructure including specific microstructures in a surface layer region extending from the surface of the steel sheet to a depth of 100 μm and in an inner region other than the surface layer region. The high-strength steel sheet has the maximum height of the surface roughness of 30 μm or less, a tensile strength of 980 MPa or more, a uniform elongation of 6% or more, and a ratio of 107-cycle plane bending fatigue strength to tensile strength (fatigue limit ratio) of 0.45 or more.

The invention discloses a hydraulic conduit composite working condition bending fatigue life evaluation test system and method, and relates to the technical field of hydraulic conduit reliability test, and the system comprises a vibration test system, a conduit installation clamp, an oil pressure pump source, and a stress acquisition and monitoring system. The method comprises the following steps of: directly simulating a temperature, pressure and vibration coupling action environment of a hydraulic conduit in actual work to obtain a relational expression between a fatigue strength limit of a conduit test piece and temperature, pressure and vibration stress; and finally, the bending fatigue life of the aircraft hydraulic conduit can be evaluated by measuring the temperature, pressure and vibration stress environment of the aircraft hydraulic conduit in actual work in combination with a relational expression curve obtained by a test.

The invention discloses an intelligent vehicle roller steel wire rope bending fatigue test method and device, the device comprises a packaging plate, a steel wire rope clamping assembly arranged on the packaging plate, and a shooting assembly arranged on the opposite surface of the packaging plate, and the steel wire rope clamping assembly is used for abutting against the center point of the steel wire rope so as to keep the center point of the steel wire rope unchanged; steel wire rope bending driving assemblies are arranged above and below the steel wire rope clamping assemblies on a back plate of the container plate and used for fixing the upper end and the lower end of a steel wire rope and driving the upper end and the lower end of the steel wire rope to swing with the center point of the steel wire rope as the circle center. The shooting assembly is used for shooting images of the central point of the steel wire rope when the upper and lower ends of the steel wire rope swing around the central point of the steel wire rope; the shooting assembly is connected with a processing system; the processing system tests the bending fatigue of the steel wire rope based on the image change of the central point of the steel wire rope; according to the invention, the image change of the central point of the steel wire rope can be quickly and accurately identified.

This invention relates to a 1900MPa grade ultra-high strength and toughness stainless gear steel and its preparation method. The chemical composition of the 1900MPa grade ultra-high strength and toughness stainless gear steel, by mass percentage, is: C 0.08-0.11%, Cr 10-12%, Ni 2-4%, Mo 2-5%, Co 10-13%, V 0.2-0.6%, Nb 0.02-0.05%, Al 0.5-1.0%, with the balance being Fe and unavoidable impurities. Its composition design must meet the following requirements: Chromium equivalent Cr... eq It is 17~18, with a nickel equivalent (Ni). eq The martensitic transformation point is 14-15. s The temperature range is 240~280℃. Its beneficial effects are: strengthening through the composite precipitation of intermetallic compounds NiAl and M₂C carbides, combined with Cr... eq Ni eq M s A synergistic design incorporating 5%–10% metastable austenite achieves an excellent balance between strength and toughness. The resulting steel exhibits tensile strength ≥1900 MPa, yield strength ≥1550 MPa, elongation ≥13%, fracture toughness ≥80 MPa·m¹ / ², and bending fatigue limit reaching 920 MPa. It is particularly suitable for manufacturing critical structural components requiring high load-bearing capacity and high reliability, such as aircraft engines, and has broad application prospects.

The application provides a low-torque steel wire rope with a twist pitch, which improves the bending fatigue performance of the manufactured steel wire rope by setting a composite core, and effectively improves the radial support stiffness and the anti-torsion performance of the composite core by the radial constraint and the shaping support of the fiber core formed by the thermosetting resin layer. Meanwhile, the inner layer strand and the outer layer strand with opposite twist pitches are sequentially arranged outside the composite core, and the filling strand and the filling steel wire are arranged in the gap between the inner layer strand and the outer layer strand, which significantly improves the tensile strength and the anti-torsion performance of the steel wire rope, improves the structural compactness and the support of the whole steel wire rope, makes the stress of the steel wire rope more balanced during use, and avoids the structural damage caused by local stress concentration. Finally, by setting the twist pitches of the first steel wire, the inner layer strand and the outer layer strand, the manufactured steel wire rope has good low-torsion performance and bending fatigue performance, and has structural stability and a long service life, which can meet the long-term use requirements in multiple scenes such as hoisting and traction.

The application discloses a prediction method for the relationship between welding repair defects and fatigue life of TC17 titanium alloy blades, and comprises the following steps: step one, establishing a fatigue life prediction model related to repair defects; step two, preparing a rotary bending fatigue sample; step three, heat treating a surfacing sample; step four, processing the rotary bending fatigue sample; step five, testing the rotary bending fatigue; step six, analyzing a fracture and counting defects; and step seven, establishing a rotary bending fatigue life prediction model. The application selects an electric arc welding wire repair test block, tests the rotary bending fatigue performance of the test block, observes and counts the defect morphology, size and position of the fracture, analyzes the corresponding relationship between the defects and the fatigue life, establishes a fatigue life prediction model related to the repair defects, and determines the influence of the pore defects on the fatigue life of the repaired blade through the model.

The invention discloses a method for evaluating the low-temperature fatigue performance of an asphalt mixture, belongs to the technical field of road engineering, and aims to solve the technical problem of how to more accurately and comprehensively evaluate the fatigue performance of the asphalt mixture in a low-temperature environment. According to the technical scheme, the method comprises the following steps: preparing a prismoid test piece and a beam test piece made of the same asphalt mixture as the prismoid test piece; acquiring a temperature change sequence of the pavement structure in the target test environment for a plurality of continuous hours through temperature acquisition equipment; taking the collected temperature change sequence as an environment control condition, carrying out a constraint test piece temperature stress test on the prismoid test piece, and synchronously recording the axial force per hour in the test process; calculating the average temperature stress value in the test period according to the axial force per hour and the size of the prism test piece; the average temperature stress value serves as the initial stress level of the four-point bending fatigue life test and is pre-loaded on the beam test piece, and a plurality of different load stress levels are selected for testing.

The utility model relates to the technical field of hoist gates, in particular to a hoist gate rod piece linkage device which comprises a gate, two vertical plates are fixedly installed at the upper end of the gate, movable grooves are formed in the vertical plates, pin shafts are arranged in the movable grooves in a sliding mode, a plurality of blocking covers are fixedly arranged on the pin shafts, and the blocking covers are fixedly connected with the gate. The blocking covers are distributed on the two sides of the movable groove, a lead screw is rotationally arranged on the pin shaft, and the lead screw is arranged between the two vertical plates. The gate is rotationally connected with the bottom end of the lead screw through the vertical plate and the pin shaft, when the gate is sealed, the gate can radially move by the compression distance of the sealing ring, in the radial movement process of the gate, the lead screw can radially move in the movable groove in a small range through the pin shaft, the problem that the lead screw cannot radially move and is bent is solved, and the service life of the gate is prolonged. Therefore, bending fatigue of the lead screw can be effectively avoided, and the service life of the lead screw is greatly prolonged.

A blended rope is provided having an outer sheath (8) enclosing at least a strength member (7), the strength member (7) having high-strength synthetic fibers, the strength member (7) being a blended strength member (7) formed with a combination of ARAMID fibers and HMPE fibers, the blended strength member comprising a non-homogeneous distribution of the ARAMID and HMPE fibers, wherein the weight ratio of ARAMID to HMPE in the strength member (7) is preferably a minimum of 80:20.

The invention relates to the technical field of metal conduit fatigue testing, and provides a bending fatigue testing device for a metal pipe and a testing method using the bending fatigue testing device. Comprising a headstock and a tailstock, and a test piece is connected between the headstock and the tailstock through a fixing assembly; a bending degree adjusting assembly is arranged in the headstock, one side of the bending degree adjusting assembly is connected with a rotation driving assembly, and the other side of the bending degree adjusting assembly is connected with a test piece fixing assembly; the top of the linear sliding table module is sequentially connected with an upper adjustable clamp and a lower adjustable clamp, and the upper adjustable clamp and the lower adjustable clamp are used for clamping a test piece; the joints of the upper adjustable clamp and the lower adjustable clamp with the test piece are far away from the joint of the test piece and the tailstock, and two groups of strain gauges are adhered to one sides of the joints of the upper adjustable clamp and the lower adjustable clamp with the test piece. The beneficial effects are that: aiming at the bending fatigue performance test of the pipe, joint determination of bending fatigue failure of the pipe and the pipe joint is avoided, and the test efficiency is improved.

The invention belongs to the field of endoscope testing, and provides an endoscope bending fatigue testing device and method.The endoscope bending fatigue testing device comprises a detection table, a plurality of lifting blocks are vertically installed on the detection table in a sliding mode, the lifting blocks are distributed at equal intervals, every two adjacent lifting blocks are distributed in a staggered mode, each lifting block is provided with a containing groove, and the containing grooves are communicated with the detection table. A lower limiting rod and an upper limiting mechanism are fixedly mounted in the placement groove, and the upper limiting mechanism is used for limiting the endoscope; a driving mechanism is fixedly mounted at the bottom of the detection table, and a plurality of output ends of the driving mechanism are respectively connected with the plurality of lifting blocks through connecting assemblies. According to the endoscope testing device, the elastic clamping mechanism is arranged, the elastic clamping mechanism can fix the end of the endoscope, compensate the horizontal length of the endoscope in the bending process and drive the endoscope to rotate in the moving process of the endoscope, so that the same part of the endoscope is tested in different directions, and the testing result is more accurate.

A wave-shaped web I-beam front axle, including I-beam and the front axle body arranged at both ends of the I-beam, the front axle body extends obliquely outward and is provided with a front axle pipe, the I-beam includes horizontal upper web and lower web, the upper web and the lower web are fixedly connected by vertical middle web, so that the upper web, the middle web and the lower web form the I-beam with I-shaped cross section, and the horizontal section of the middle web is wave-shaped.The utility model discloses more reasonable structure design, through reducing the thickness of the upper web of the I-beam, the width of the upper web and the lower web of the I-beam and the thickness of the middle web, the relative circular pipe beam cross section area reduces 29.5%, realizes that the I-beam front axle reduces 12.5% in weight, in addition, the cross section height of the I-beam is higher than that of the circular pipe beam, improves the bending fatigue strength of the front axle, the middle web is designed into wave-shaped, improves the bending deformation stiffness of the front axle, namely, in the whole weight reduction, the bending resistance of the front axle can be improved.

The invention relates to the technical field of flexure performance testing, in particular to a tensile and flexure-resistant performance testing device for an insulated cable. Comprising a base; the controller is mounted on the side surface of the base; the movable seat is connected to the base in a sliding manner; the rotating disc is rotationally connected to the moving seat; the air pump is mounted on the side surface of the movable seat; the fixed plates are symmetrically connected to the side surface of the rotating disc; and the fixed cylinders are symmetrically connected to the fixed plate, the fixed cylinders penetrate through the side face of the rotating disc, and through holes are formed in the fixed cylinders. Through the cooperation of the air pump, the fixed cylinder and the roller, an air diaphragm can be formed between the cable body and the roller, so that the cable can realize non-contact sliding with the roller during a deflection test, specifically, the air pump conveys compressed air to the fixed cylinder through the shunt pipe, and the compressed air is sprayed out through the through hole and the air outlet pipe, so that a dynamic air cushion can be formed; unexpected tensile load and surface abrasion caused by traditional roller friction can be avoided, and it is ensured that the test result only reflects the real bending fatigue performance of the cable.

The invention discloses a pure bending fatigue sample bending moment locking device, a pure bending fatigue machine and a use method, and relates to the technical field of mechanical detection.The pure bending fatigue sample bending moment locking device comprises a plurality of limiting rods, a first positioning baffle, a second positioning baffle and a plurality of first limiting blocks, and the limiting rods are arranged in parallel; the first positioning baffle is connected with one end of the limiting rod and can be located at the position in the length direction of the limiting rod. The second positioning baffle and the first positioning baffle are arranged in parallel, and the second positioning baffle is in sliding connection with the limiting rod and can keep the position after sliding; the first limiting block is fixedly connected to the end, away from the first positioning baffle, of the limiting piece and located on the side, away from the first limiting baffle, of the second limiting baffle, so that when the second positioning baffle abuts against the first limiting block, the distance between the two side faces, away from each other, of the first positioning baffle and the second positioning baffle is the length of a standard force arm. Usage is convenient, and test data precision is effectively guaranteed.

The invention discloses a treatment process for improving the three-point bending fatigue limit of a thin-wall titanium alloy test piece, and relates to the field of metal material processing for improving the anti-fatigue performance, and the treatment process comprises the following steps: pretreating a TC4 titanium alloy sheet to obtain a test piece; processing the test piece by using ultrafast laser shock peening; setting a load, and respectively carrying out three-point fatigue tests on the test piece before and after strengthening; and calculating the bending fatigue limit of the test piece before and after strengthening, and carrying out strengthening mechanism analysis and comparison. According to the method, a thin-wall TC4 titanium alloy three-point bending test piece can be subjected to impact strengthening by optimizing the combination of femtosecond laser energy and impact times, a gradient structure and residual compressive stress are introduced to a surface layer by utilizing high-strain-rate plastic deformation induced by ultrafast laser, fatigue crack initiation is inhibited, meanwhile, expansion of a heat affected zone and deformation of the test piece are avoided, and the impact strength of the thin-wall TC4 titanium alloy three-point bending test piece is improved. Therefore, the bending fatigue performance is improved.

The invention discloses an anti-bending fatigue cable and a preparation method thereof, and relates to the technical field of cables, the anti-bending fatigue cable comprises a first cable main body and a second cable main body, the first cable main body and the second cable main body comprise detachable assemblies, the detachable assemblies comprise connecting frames, groove bodies are formed in the connecting frames, insertion blocks are inserted into the groove bodies, and the insertion blocks are inserted into the groove bodies. The cable comprises a first cable main body and a second cable main body, an insertion block is arranged in the first cable main body, two sides of the insertion block are connected with a spring and a buffer sleeve, the buffer sleeve is in an arc shape, a connecting assembly is arranged between the first cable main body and the second cable main body, and the connecting assembly comprises a first polyurethane elastic rib. The wear rate of the sheath layer is reduced by more than 60%, the detachable assembly realizes rapid disassembly and assembly of the first cable main body and the second cable main body, and the cable is suitable for combination requirements of different numbers of cables and has strong versatility.

The invention discloses a gear broken tooth failure diagnosis method and a related device under a friction dynamics coupling condition, and relates to the technical field of gear broken tooth failure diagnosis, and the method comprises the steps: solving a dynamics model in a gear transmission process under the friction dynamics coupling condition, the method comprises the following steps: obtaining a rotation angle of a driving gear and a rotation angle of a driven gear, further calculating to obtain gear tooth root bending stress and a gear bending fatigue safety coefficient, and decomposing vibration signals in a transmission process of the driving gear and the driven gear by utilizing an ICEEMDAN algorithm when determining that a tooth breakage risk exists based on the gear bending fatigue safety coefficient. And further determining a support vector, calculating a distance between the support vector and a sphere center of a reference hypersphere constructed by using an SVDD algorithm, and calculating to obtain a gear health degree based on the distance so as to complete gear tooth breakage failure diagnosis. According to the method, the calculation precision of the gear tooth root bending stress and the diagnosis precision of gear tooth breakage failure diagnosis can be improved.

This invention discloses a method and apparatus for testing the bending fatigue of a steel wire rope in a smart vehicle drum. The apparatus includes a container plate, a steel wire rope clamping assembly mounted on the container plate, and a camera assembly mounted on the opposite side of the container plate. The steel wire rope clamping assembly holds the center point of the steel wire rope to keep it constant. The back plate of the container plate has steel wire rope bending drive assemblies above and below the steel wire rope clamping assembly. These drive assemblies fix the upper and lower ends of the steel wire rope and drive them to swing around the center point. The camera assembly captures an image of the center point of the steel wire rope while the upper and lower ends swing around the center point. The camera assembly is connected to a processing system that tests the bending fatigue of the steel wire rope based on the image changes of its center point. This invention can quickly and accurately identify image changes in the center point of the steel wire rope.

The invention discloses an anti-bending and anti-fracture bamboo louver blade and a preparation process thereof, and belongs to the field of building decoration materials. In order to solve the problems that a traditional bamboo louver blade is prone to breakage and bending failure due to the fact that bamboo wood is low in cross grain strength and high in hygroscopicity, performance breakthrough is achieved through multi-dimensional synergistic modification. The preparation process comprises the following steps: selecting bamboo wood of 3-5 years old, cutting the bamboo wood, performing ultrasonic cleaning with sodium carbonate, treating linen fibers with acetic acid and a silane coupling agent, performing vacuum permeation and plastification with a glycerol-citric acid solution, constructing a bamboo wood-fibrofelt-bamboo wood three-layer composite structure, performing hot-pressing curing, and performing gradient drying, low-temperature circulation and beeswax-nano silicon dioxide coating edge sealing. Experiments show that the louver blade can resist bending for 5200 times, the elongation at break is 8.2%, the bending strength is 140 MPa, and the impact strength is 65 kJ / m < 2 >. Compared with a single reinforcing process of resin impregnation or recombined fibers, the bending fatigue resistance is improved by 32.7%-46.2% through cooperation of plasticizing modification, a laminated structure and surface protection, and the method is suitable for high-end building decoration scenes.

The utility model relates to the field of graphite sheet testing equipment, in particular to a graphite bending fatigue testing device which comprises a bearing vertical plate and a bending mechanism used for bending a flexible graphite sheet, the bearing vertical plate is rotatably connected with more than one bearing guide wheel, a traction rope is hung on the more than one bearing guide wheel, and the traction rope is connected with the bending mechanism. One end of the traction rope is connected with the counterweight piece, the other end of the traction rope is connected with one end of the flexible graphite sheet, and the other end of the flexible graphite sheet is connected to the bending mechanism. According to the graphite bending fatigue testing device disclosed by the utility model, a bending fatigue test can be carried out on a graphite monomer, all materials do not need to be assembled into a folding mobile phone to be tested, and only one graphite flake is scrapped in each test, so that the test cost is effectively reduced, the test efficiency is improved, and the test requirements of customers can be conveniently and quickly responded.