579 results about "Shear resistance" patented technology

The invention particularly discloses a rock-soil body interface torsional shear characteristic and toughness parameter unit body test device which comprises a unit body sample blank manufacturing device, a centering device, a special drilling tool, a rib body and a torque load.The rock-soil body interface torsional shear characteristic and toughness parameter unit body test device has the beneficial effects that traditional direct shear / drawing shear is replaced with torsional shear loading; the problem that the interface contact area is reduced in the shearing process is thoroughly solved, it is ensured that the interface contact area of an anchor / pile and a rock-soil body is constant, a pressure water bag is arranged at the top of a test box unit body, the original overlying and confining pressure environment of a stratum is accurately simulated, a test anchor hole / pile hole is directly manufactured through a drilling technology, and the natural roughness characteristic of the hole wall is reserved to the maximum extent; the smooth wall surface limitation of traditional mold pore forming is broken through, the basic toughness concept of the anchor / pile-rock-soil body interface is defined for the first time, the nature of the basic toughness can be quantitatively represented by the robustness of the shear resistance of the interface, a matched toughness testing technology and evaluation method are developed, and a theoretical model and a calculation tool are provided for the toughness design of anchoring engineering and pile foundation engineering.

The invention discloses a method for evaluating damage evolution of an underground structure under the action of a sudden explosion load, and relates to the technical field of civil engineering and engineering disaster prevention, and the method is characterized by comprising the following steps: S1, simulating the underground structure based on an explosion load, a geometric boundary and material parameters, and constructing a unified constitutive model; and S2, introducing a pressure-related strength criterion of a Dwark-Prasugrel criterion into the unified constitutive model so as to describe the influence of confining pressure on the shear strength. The technical problem to be solved by the invention is to provide the method for evaluating the damage evolution of the underground structure under the action of the burst explosion load, so that the key pain points such as pressure correlation, high strain rate effect, material random discreteness, damage softening energy consistency and the like are difficult to consider at the same time in the existing analysis method. A set of damage evolution evaluation method and implementation system which can be implemented from the material level to the structure level is established, and quantitative prediction and engineering grading judgment of the whole process of crack initiation, expansion to instability failure of the underground structure are supported.

The invention relates to the technical field of embankment reinforcing and widening, and provides an embankment widening construction method based on biomineralization and reinforcement cooperation. The microcosmic cementation effect of calcium carbonate precipitation in the inclusion is induced by the enzyme and is combined with the macroscopic constraint of the geogrid, so that a friction-cementation composite interface is formed, and the shear resistance and impermeability of the new and old roadbed combined surface are greatly improved. Meanwhile, the synergistic enhancement transition area serves as a rigidity coordination layer, loads can be effectively homogenized, differential deformation can be effectively absorbed, and therefore differential settlement is restrained, and reflection cracks are prevented. According to the method, the microcosmic cementation strengthening capacity of enzyme-induced calcium carbonate precipitation and the macroscopic reinforcement restraining capacity of the geotechnical reinforcement material are subjected to space coupling and function cooperation, the weak area of the widened embankment is fundamentally improved, and the integrity and long-term stability of the widened embankment are remarkably improved.

The invention provides high-toughness chitosan hydrogel and a preparation method thereof, and belongs to the technical field of chitosan materials. Under a specific electric field driving condition, a chitosan solution realizes molecular chain oriented migration and in-situ deposition in an acid environment, and a three-dimensional network with dense arrangement and a gradient structure is constructed. The chitosan hydrogel disclosed by the invention has excellent performance in the aspects of tensile strength, elongation at break, toughness, shear resistance and the like which exceed those of chitosan hydrogel prepared by most methods, and has good biocompatibility and application potential. The programmable regulation and control of the structure and performance of the chitosan hydrogel can be realized by regulating and controlling the pH value, the electric field intensity, the current density, the deposition time and the like of the system. The high-toughness chitosan hydrogel prepared by the method is suitable for various biomedical scenes, such as bionic soft tissues, bone repair scaffolds, flexible electronic devices and other wet application scenes with high mechanical property requirements.

To provide an anchoring structure between a non-ferrous reinforcement of a cast-in-place wall balustrade and a floor slab, which has required shear resistance at a joint portion, which prevents stress from concentrating on a bent portion, and which achieves dynamically efficient bar arrangement.SOLUTION: In an anchoring structure between a non-ferrous reinforcement of a cast-in-place wall balustrade 2 and a floor slab (PC floor slab 2), the non-ferrous reinforcement has a diameter equal to or larger than a nominal diameter of a reinforcing bar required in structural design, a bending inner radius of the non-ferrous reinforcement is 2.5 times or more of the bending inner radius of the reinforcing bar, and an anchoring length of the non-ferrous reinforcement is 12 times or more of a diameter of the non-ferrous reinforcement.SELECTED DRAWING: Figure 1

The invention relates to the technical field of geotechnical engineering anchoring, in particular to a method for testing the degradation characteristic of the bearing performance of a recyclable anchor rod under cyclic loading. The method comprises the following steps: preparing a unit body sample anchor-rock interface unit body sample, simulating weathered soft rock according to a specific ratio, pouring a self-compacting concrete anchoring body, and curing and forming; setting a combined parameter of a reference load ratio and a load cycle index, applying a triangular wave cyclic load to simulate a traffic condition, and executing a pull-out test to collect load-displacement data; constructing a two-parameter coupled shear strength degradation model based on test data, and proposing a shear stress-displacement curve model; an anchor rod load transfer control equation is established in combination with the Poisson effect, and shear stress distribution of the anchoring section is iteratively solved by adopting a discrete recursion method; the model is verified through a foundation pit engineering case, the ultimate bearing capacity degradation law of the anchor rod under long-term cyclic loading is predicted, and it is proved that the model can guide engineering safety design. According to the method, the coupling characterization of the cyclic load parameter and the interface degradation mechanism is realized.

The invention provides a rapid evaluation method for shear strength of a rock structural plane under normal disturbance, and belongs to the technical field of geotechnical engineering and rock mechanics, the method comprises the following steps: S1, sample preparation and initial parameter acquisition; s2, normal disturbance direct shear test; s3, fitting test data and establishing an empirical model; and S4, rapidly evaluating the shear strength. According to the method, by introducing a normal disturbance stress parameter, an empirical calculation formula capable of rapidly predicting the shear strength after disturbance is established, and key parameters are provided for engineering design and stability analysis.

The invention discloses a hybrid control method and device for a shear strength test of a rock mass structural plane, and relates to the technical field of physical property analys.The hybrid control method comprises the steps that the stress accumulation state before shear failure is simulated by controlling shear force to be increased or kept according to a preset function relation; judging whether a first condition for converting from the first mode to the second mode is met or not in real time, switching to the second mode when the first condition is met, controlling the position of the sample to remain unchanged, and simulating a stress release state during shear failure; judging whether a second condition for converting from the second mode to the third mode is met or not in real time; when a second condition is met, switching to a third mode, controlling the sample to slide at a constant rate, and simulating a stress retention state after shear failure; and when the accumulated slippage distance of the sample reaches a preset limit value, ending the test. According to the method, full-stage mechanical behaviors from the moment before damage to the moment after damage are reproduced, and accurate data support is provided for slope stability analysis and anti-sliding design.

The invention discloses a steel reinforced concrete column and beam connecting structure and a connecting method thereof, and relates to the technical field of steel reinforced concrete.The steel reinforced concrete column and beam connecting structure comprises profile steel and a steel beam horizontally distributed on the side face of the profile steel, a circle of transverse bars are distributed on the outer side of the profile steel and the outer side of the steel beam, and a plurality of first-class bundling bars are evenly bundled on the outer side of each set of transverse bars; a connecting mechanism is arranged between the section steel and the connecting end of the steel beam, the connecting mechanism comprises a connecting plate distributed on one side of the section steel, and a bracket plate is welded to the end of the connecting plate; reinforcing mechanisms for improving anti-shearing force are arranged at the upper end and the lower end of the connecting mechanism, each reinforcing mechanism comprises a sleeving plate clamped to the outer side of the corresponding bracket plate in a sliding mode, a main reinforcing plate is welded to the top of each sleeving plate, and an end sleeve plate is welded to the top of each main reinforcing plate. The connecting structure of the steel reinforced concrete column and the beam and the connecting method of the connecting structure have the effects of being convenient to operate and high in structural strength.

This invention proposes a multi-layered, sheet-like silver-coated aluminum powder, its preparation method, and a conductive rubber material. The multi-layered, sheet-like silver-coated aluminum powder comprises: sheet-like aluminum powder, a silica layer, and a silver layer; the silica layer coats the surface of the sheet-like aluminum powder, and the silver layer coats the surface of the silica layer. This invention, employing a multi-layered composite structure design of "aluminum core-silica layer-silver layer," solves the problems of poor aluminum powder stability and easy silver migration, and possesses advantages such as low cost and shear resistance, thus obtaining a novel white conductive filler with high performance, high stability, and high applicability.

The utility model provides an anchoring anti-shearing mechanism and an anchoring device. The anchoring anti-shearing mechanism comprises a steel embedded plate, a steel anchoring assembly and a steel anti-shearing assembly. The steel embedded plate is used for being fixedly connected with a building main body structure; the steel anchoring assembly comprises an anchoring steel bar and a steel anchoring end plate, one end of the anchoring steel bar is connected with the steel embedded plate in a welded mode, the other end of the anchoring steel bar is fixedly connected with the steel anchoring end plate, and the cross section area of the steel anchoring end plate is larger than that of the anchoring steel bar. The anchoring steel bars and the steel anchoring end plates are jointly used for anchoring the steel embedded plates; the anti-shearing assembly comprises a steel anti-shearing piece and a steel reinforcing piece, the steel anti-shearing piece is of a cross-shaped structure, the steel reinforcing piece is of a cylindrical structure, the steel reinforcing piece is arranged in the center of the steel anti-shearing piece, the steel anti-shearing piece is fixedly connected with the steel reinforcing piece, and the steel anti-shearing piece and the steel reinforcing piece are both connected with the steel embedded plate in a welded mode. The anchoring anti-shearing mechanism has the high tensile capacity and the high anti-shearing capacity.

The present application relates to the field of building, specifically to a composite panel-type tie member and a shear performance calculation method; comprising a steel core layer and outer cover layers located on both sides of the steel core layer to clamp and position the steel core layer; the outer cover layers are made of GFRP material, and the sizes of the two outer cover layers correspond; the size of the steel core layer is smaller than that of the outer cover layer, and the steel core layer and the outer cover layer have an equal proportion corresponding relationship; after the centers of the steel core layer and the outer cover layer are aligned, the gap area between the edges of the outer cover layers and the edges of the steel core layer is filled with bonding material. The tie member has high shear strength and stiffness, and effectively reduces the influence of wallboard thermal bridge effect.

The invention relates to the technical field of landslide disaster treatment, and discloses a cutting section landslide treatment method and structure based on a steel corrugated plate, which adopts an innovative combined structure of the steel corrugated plate and a reinforced concrete lining to realize advantage complementation of flexibility and rigidity; wherein the steel corrugated plate can effectively resist external soil pressure and flexibly absorb settlement deformation of a foundation by virtue of extremely high axial compressive strength and excellent deformation adaptive capacity, and meanwhile, the steel corrugated plate is used as a supporting template of a concrete structure, so that the aim of quickly implementing protection is fulfilled; the reinforced concrete lining greatly improves the overall rigidity and the shear strength of the structure, and the problem that a pure steel structure is prone to local instability is fundamentally avoided; and the two synergistically form a strong retaining system, so that the treatment effect is lasting and stable, and potential safety hazards are thoroughly solved.

The application discloses a brazing process for realizing connection of hard alloy and steel dissimilar materials by using low-silver foil brazing filler metal and application thereof, realizes connection between the hard alloy and the steel, fully gives play to the advantages of the hard alloy and the steel, avoids precipitation of hard and brittle phases at a weld interface, solves the problem of excessive dissolution of base materials, and has the characteristics of high shear strength. The application provides a brazing process for realizing connection of hard alloy and steel dissimilar materials by using low-silver foil brazing filler metal, compared with other welding technologies, the brazing process has good welding effect, low production cost, safety and environmental protection. Meanwhile, the shear strength at a welding position is high, and the corrosion resistance is excellent, and the brazing process is especially suitable for welding of the hard alloy and the steel in a shield tunneling machine cutter.

The invention discloses a Ti / Al alloy laminated composite board and a preparation method thereof, and belongs to the technical field of titanium-aluminum alloy powder metallurgy. The preparation method comprises the following steps: (1) pre-pressing: alternately and uniformly laying aluminum powder and sponge titanium powder to form an aluminum powder layer and a sponge titanium powder layer, and compacting every time the laying of one layer of powder is completed to obtain a layered powder blank; (2) carrying out two-stage cold isostatic pressing treatment on the layered powder blank to obtain a composite board blank; and (3) carrying out multi-pass hot rolling on the composite board blank under the protection of inert atmosphere to obtain the Ti / Al alloy laminated composite board. Through the three-stage process of pre-pressing, two-stage cold isostatic pressing and controlled hot rolling, a wavy interlocking structure is formed, the synergistic effect is effectively utilized, the energy absorption capacity, the interface bearing capacity and the anti-shearing performance of the composite board are improved, grains are effectively refined, the harmful phase change probability is reduced, the interlayer interface bonding quality is improved, and the service life of the composite board is prolonged. Therefore, the room-temperature plasticity and fracture toughness of the composite board are optimized.

The present application belongs to the technical field of concrete beam-column structure, and specifically relates to a beam-column structure with locally internally arranged thin-walled steel pipes and a mounting method thereof. By reasonably arranging the internally arranged steel pipes and steel bars, the effects of reducing the self weight and improving the bearing capacity of the structure are achieved. The application of the steel pipes not only enhances the bending and shearing resistance of the concrete components, but also effectively delays the generation and expansion of cracks. In addition, due to the high strength and rigidity of the steel pipes, the structure can still remain stable under high load conditions, and is particularly suitable for occasions requiring high bearing capacity, such as bridges and buildings. A new design method of internally arranged steel pipe concrete is proposed by fully considering the stress characteristics of the beam-column components. Through detailed analysis of the structural details and working principles, professional technicians can implement the present application according to the description, so as to effectively improve the safety and economy of the engineering structure. The present application is used for improving the shearing, bending and overall stability of the structure.

The invention discloses a rock axial tensile strength and transverse shear strength testing device which comprises a rack, a lower end axial clamp and an upper end axial clamp are arranged in the rack, and a rock sample to be tested is fixed between the lower end axial clamp and the upper end axial clamp; the lower-end axial clamp is fixedly arranged in the rack, and the upper-end axial clamp moves in the rack along the axial direction to apply axial tension to a rock sample to be tested; the rack is internally provided with at least one group of transverse pushing and pressing mechanisms, and the transverse pushing and pressing mechanisms are arranged on the side surface of a to-be-tested rock sample and apply transverse pushing force to the to-be-tested rock sample. According to the invention, the axial tensile strength and the transverse shear strength of the rock sample are tested by axially applying the tensile load and transversely applying the linear pressure load; and a research platform is provided for the mechanical strength change rule of the rock in actual engineering application under different stress state conditions.

The application discloses a shearing pin embedded outer package super high performance concrete-steel pipe concrete swing bridge pier, which is applied to a bridge and comprises a bearing platform and a composite pier column arranged on the bearing platform, a shearing resistance assembly is embedded in the lower part of the composite pier column and matched with the bearing platform, and a UHPC layer of the composite pier column and a steel pipe layer-concrete column (steel pipe concrete CFST) form a swing bridge pier (UHPC-CFST swing pier); this makes the scheme capable of utilizing UHPC and CFST to improve the toughness of the body, and capable of solving the swing rotation and shearing limiting contradiction of the bridge pier system through a connecting structure; the scheme improves the impact resistance and compression crushing resistance through the collaborative stress of the UHPC shell and the internal CFST, realizes the compatibility of high shearing bearing capacity and excellent self-resetting capacity through the 'limiting translation and releasing rotation' mechanism of the CFST shearing pin and the steel sleeve ring cooperation, and can solve the problems of insufficient interface shearing capacity of the existing swing bridge pier under strong earthquakes and impact loads and easy compression crushing of the pier bottom.

The invention relates to the technical field of geotechnical engineering, in particular to a rock joint surface roughness measuring method and system. The method comprises the steps of firstly obtaining a triangular mesh of a rock surface; further based on the spatial distribution of the unit external normal vector in the global coordinate system, carrying out shielding detection on the local surface elements along a shearing reverse direction, and screening out potential contact surface elements; further analyzing each potential contact surface element in the global coordinate system, and calculating frictional sliding work in combination with preset working condition parameters; the rock mass supporting thickness is further obtained, and root cutting work is calculated in combination with preset working condition parameters and the projection area of the shear plane; root cutting work and friction sliding work are further compared, an energy consumption mode is marked, a shear energy consumption digraph is constructed, and equivalent shear resistance roughness is calculated, so that the problem that thin ridge bulges which are easy to cut off are counted into the roughness by mistake under high stress in a traditional method is solved, and stress-sensitive effective roughness measurement is realized.

The invention discloses a steel rib reinforcing and efficient connecting system for a light integrated board and a light inner partition wall board, the steel rib reinforcing and efficient connecting system for the light integrated board comprises a composite welding steel skeleton, the composite welding steel skeleton comprises a main frame, a reinforcing structure and a plurality of connecting pieces, the reinforcing structure is welded to the outer side of the main frame, and the connecting pieces are welded to the outer side of the main frame; the connecting pieces are fixed to the edges of the main frame and used for being connected with an external structure. Wherein the main frame comprises at least two keels and at least two liner tubes, the keels and the liner tubes are vertically connected, and the keels and the liner tubes are arranged together in a latticed structure. Through the application of the invention, a built-in reinforcing and efficient connecting system suitable for the light inner partition wall board is provided, the built-in reinforcing and efficient connecting system is particularly suitable for comprehensive improvement of bending resistance, shearing resistance, stability and the like of the light inner partition wall board, and the service life of the light inner partition wall board is further prolonged; and the prefabrication rate is high, the construction speed is increased, and the requirement for light weight is met.

Disclosed in the present application is a battery pack, comprising a housing, a cell assembly, and reinforcing plates. The reinforcing plates each comprise a foam adhesive layer and a fiberglass cloth layer, wherein the foam adhesive layer is wrapped around the fiberglass cloth layer. The cell assembly is arranged in the housing, one reinforcing plate is arranged on each of two side walls of the cell assembly in the direction of length thereof, and the foam adhesive layers are fitted to the side walls of the cell assembly. On the basis of the law of the lever, the battery pack has the lowest bending and shear resistance in the direction of length of the cell assembly, and mounting the reinforcing plates on both sides of the cell assembly in the direction of length thereof can specifically improve the bending and shear resistance of the battery pack.

The utility model relates to the technical field of steel bar mesh detection, in particular to a steel bar welded mesh shearing resistance detection device for reinforced concrete, which comprises a lower clamp, the lower clamp is used for clamping a vertical rod of a steel bar sample, the steel bar sample further comprises a transverse rod, and the transverse rod is welded at the upper end of the vertical rod; the cross rod is hung on the hook; the lower clamp comprises an extruding assembly and a clamping assembly, the extruding assembly extrudes the clamping assembly to clamp and fix the vertical rod, the extruding assembly comprises a cross beam, the two ends of the cross beam are fixedly connected with connecting bases, a driving assembly is arranged on the side edge of the cross beam, and a locking assembly is arranged on the lower side of the driving assembly. The steel bar sample clamping device can adapt to clamping of steel bar samples with different diameters, the universality of the detection device is improved, and the left clamping plate and the right clamping plate can move downwards when getting close to each other, so that the steel bar samples are driven to move downwards in the steel bar sample clamping process, and the steel bar samples are prevented from being separated from the hook.

The invention relates to switch contact lubricating grease friendly to copper and silver materials and a preparation method of the switch contact lubricating grease. The lubricating grease comprises the following components in parts by weight: 55-90 parts of base oil, 3-20 parts of a thickening agent and 7-25 parts of a functional additive. The lubricating grease is prepared by reacting organic amine with diphenylmethane diisocyanate (MDI) and adding a specific additive. The lubricating grease has good compatibility with copper and silver materials, does not cause corrosion, and can effectively prevent copper and silver contacts from being oxidized and discolored; the lubricating oil is low in friction coefficient and excellent in friction reduction and wear resistance, and contact wear and operation noise can be remarkably reduced; and meanwhile, the lubricating oil has good shear resistance, adhesion and thermal stability, and can still keep a stable lubricating effect even under severe working conditions such as high temperature and high pressure. In addition, the lubricating grease disclosed by the invention is wide in application range, and is particularly suitable for electrical equipment, automobiles and other application scenes with high-temperature, high-pressure and high-reliability requirements on switch contacts.

Some embodiments of the present disclosure relate to an article comprising a reinforced glass mat. In some embodiments, the reinforced glass mat includes a glass mat and a reinforcement material. In some embodiments, the glass mat includes a web of glass fibers. In some embodiments, the reinforcement material is embedded into the web of glass fibers of the glass mat. In some embodiments, the reinforced glass mat includes a sufficient amount of the reinforcement material, so as to result in a nail shank shear resistance of 13 lbs to 17 lbs, when the article is tested according to ASTM 1761 at 140° F. Methods of making the article, specific embodiments of the reinforcement material in the form of a polymeric binder, and methods of forming a roofing shingle from the article are also disclosed.

The application provides a method for determining the influence of cutter head collision on soil body when two shield machines are butt-jointed in earth, which comprises the following steps: (1) determining the rated torque M 1，max , 2，max of the cutter heads of the two shield machines, the diameters D1 and D2 of the cutter heads and the length L of the shield machines; (2) determining the position A (x0, y0) of the collision point of the two cutter heads; (3) determining the undrained shear strength c u of the soil body around the cutter heads; (4) determining the cutting torque M generated by the cutter heads on the soil body; (5) determining the maximum range of the influence of the deflection of the cutter heads on the soil body; (5-1) determining the central position B (x1, y1) of the rotating cutter head and the intersection C (x2, y2) of the peripheries of the two cutter heads; (5-2) determining the maximum range boundary generated by the cutter heads on the soil body; (6) determining the sectional area of the range of the influence of the cutter heads on the soil body, i.e. the area surrounded by the curve CGF and the curve CDEF; and (7) determining the volume of the influence of the whole shield machine on the surrounding soil body.

The invention discloses a reinforcing structure for a cross-shaped connecting part of a lightweight aluminum profile, and relates to the technical field of aluminum profile reinforcement. The clamp comprises a cylindrical base body, a cross-shaped positioning clamping groove is formed in one axial end face of the base body and used for embedding a cross-shaped aluminum profile connecting part, the end face is divided into four fan-shaped bosses through the clamping groove, each boss is provided with a lateral built-in cavity in the circumferential direction, and a clamping mechanism and a clamping plate corresponding to the inner wall of the clamping groove are arranged in each cavity. The clamping mechanism drives an axial moving seat and a double-wedge-shaped linkage block to move through a locking bolt, and a clamping plate is driven by wedge-shaped surface transmission to synchronously stretch out and draw back in the direction perpendicular to the side wall of the aluminum profile, so that uniform clamping or loosening is achieved. The structure solves the problems that an existing reinforcing mode is large in weight, uneven in locking and prone to deformation, has the advantages of being light in weight, high in strength, convenient and fast to adjust and high in universality, can remarkably improve the shear resistance and the deformation resistance of the cross-shaped splicing position of the aluminum profile, and is suitable for various light-weight aluminum profile assembling scenes.

The invention discloses a landslide simulation device with multi-size adaptive bidirectional coupling load application. Comprising three horizontal vibration conduction assemblies, a bidirectional telescopic bearing support connected with the horizontal vibration conduction assemblies, a vertical oil pressure action element connected with the bidirectional telescopic bearing support, and a landslide model box connected with the vertical oil pressure action element. And the vertical telescopic fixing bracket is detachably connected with the landslide model box and the bidirectional telescopic bearing bracket. The sizes of the bidirectional telescopic bearing support and the horizontal vibration conduction assembly can be flexibly adjusted according to the landslide model box, and the vertical telescopic fixing support is adapted to the height of the box body and the distance between the vertical telescopic fixing support and the support to form an integrated test frame; the size limitation of a traditional fixed table top is broken through, the universality, flexibility and economical efficiency of the device are remarkably improved, through overall connection of the telescopic fixing assemblies, the integrity of a force transmission path and the shear resistance of the system are enhanced, and the hidden danger that the model box slips off under strong shock is thoroughly eliminated.

The utility model relates to the technical field of engines, and provides a high-efficiency large-torque rotor engine. One of a plurality of turbine blades, slope blades and cambered surface blades is arranged in a rotor combustion chamber, the tangential stress area of a rotor is increased, dispersed and efficient combustion is achieved through an ignition channel, thrust in the rotating direction of the rotor is greatly increased, a crankshaft obtains larger torque, the overall acting power is also increased, and the service life of the rotor is prolonged. And the thrust-weight ratio of the rotor engine is improved. The crankshaft is matched with the rotor inner ring gear and the stator gear, so that power transmission of rotor acting is completed. The rotor inner ring gear and the rotor can adopt an integrated or split structure, and are connected through a polygonal embedded structure when being split, so that the torque resistance of the rotor is improved, the shear strength of a connecting bolt can be reduced, and the rotor is suitable for a high-power rotor engine structure. By improving the rotor structure, optimizing the blade design, adopting the polyhedral assembly structure and the like, the working efficiency, the torque and the overall performance of the engine are improved.

The invention discloses a precipitation strengthening aluminum-copper alloy with a reticular flow line structure and a preparation method of the precipitation strengthening aluminum-copper alloy. The precipitation strengthening aluminum-copper alloy comprises an aluminum-copper alloy matrix and an Al9 (Ni, Cu) 2 reinforcing phase with the reticular flow line structure, wherein the Al9 (Ni, Cu) 2 reinforcing phase is uniformly dispersed in the aluminum-copper alloy matrix. According to the method, in the laser forming process, the flowing shear resistance induced by the nano Ni particles can stabilize a molten pool, eutectic solidification is promoted, and shrinkage cavities and hot cracks in the aluminum-copper alloy are eliminated. The Al9 (Ni, Cu) 2 reinforced phase forms a soft and hard heterostructure interface, dendritic segregation can be eliminated, and excellent mechanical properties are obtained while uniform ductility is kept. The work provides a new example for laser additive manufacturing of the traditional non-printable aluminum-copper alloy.

The utility model provides a device for detecting the shear strength of a flexible base pavement, belongs to the technical field of detection devices, mainly aims at solving the problems that the existing detection device is poor in fixing effect on a to-be-detected piece by a test piece and a fracture surface is inconvenient to observe, and adopts the following technical scheme that the device comprises a base, a mounting table and a protective cover, a hydraulic ejector rod is arranged at the top of the mounting table; a pushing plate is arranged at one end of the hydraulic ejector rod; a first pavement layer is arranged in the protective cover; a second pavement layer is arranged at the top of the first pavement layer; a second fixing plate is arranged at one end of the first road surface layer, magnifying lenses are arranged on the two sides of the protective cover, the fixing effect on the to-be-detected piece is improved through cooperation of the first fixing plate and the pushing plate, the magnifying lenses can be moved through arrangement of the magnifying lenses and the sliding grooves, and the fracture surface of the to-be-detected piece can be observed conveniently.