54 results about "Compressive load" patented technology

The invention discloses a method and system for analyzing the rolling resistance of a concrete-filled steel tube combined pier column, and the method comprises the steps: applying an axial compression load to the concrete-filled steel tube combined pier column, and dividing the cross section of the concrete-filled steel tube combined pier column into three layers of regions along a radial material change part; according to corresponding total cross-section average axial strain generated by the steel pipe concrete combined pier column when different axial compression loads are applied, equivalent stress corresponding to each layer of area is calculated, total axial force corresponding to each total cross-section average axial strain is calculated, and a total cross-section average axial strain-total axial force curve is formed; searching a first total cross-section average axial strain corresponding to the maximum value of the total axial force in the total cross-section average axial strain-total axial force curve and a second total cross-section average axial strain corresponding to a first obvious inflection point of the total cross-section average axial strain-total axial force curve, and calculating a ductility coefficient, and judging whether the concrete-filled steel tube composite pier column meets the ductility design requirement or not.

The invention discloses a composite material connecting rod structure, and relates to the technical field of composite material structure design and manufacturing, in particular to a light high-strength composite material connecting rod which comprises a composite material rod body, a flange connector, a flange clamp, an adjustable clamp and a tensile bolt set. The composite material rod body is made of fiber reinforced resin matrix composites through a winding or laying winding process, and reinforcing areas and transition oblique angles are arranged at the two ends of the composite material rod body. The adjustable clamp and the flange clamp are in interference fit with the end of the rod body through built-in inclination and surface texture, the flange connector is connected with the clamp through the tensile bolt set, and efficient transmission of tension and compression loads is achieved. Through the integrated combined structural design, the problems of stress concentration and interface failure caused by traditional glue joint or screw joint are solved, the bearing capacity, environmental adaptability and reliability of the connecting rod are remarkably improved, and the connecting rod is suitable for the high-load fields such as aerospace, high-speed rails and heavy machinery.

Protection of tubulars from premature wear in the mid-body section due to highly curved wellbores, including bowing from high axial compressive loads, or gravity induced bowing in a horizontal section of the wellbore is disclosed. It includes a method of installing a strong, wear resistant, fully encircling steel band around the midbody region of tubular joints on new and worn tubulars. Further, it does so without degrading the metallurgy or microstructure of the pipe body yet attaches the protective band with such high clamping force that it is unlikely to slip even under the most extreme service conditions. In addition, the circumferential integrity of the pipe band makes it even less likely to ever break off. A protective band includes a wear resistant hard banding weld overlay installed around the circumference of the protective band.

This invention relates to the field of novel materials, specifically a novel metamaterial exhibiting both multi-stable state and negative Poisson's ratio properties. It comprises a concave hexagonal frame, two arc-shaped beams positioned on the upper and lower sides of the frame's inner cavity, and a vertical rod. The two arc-shaped beams are fixedly connected to the upper and lower ends of the vertical rod via their respective central portions. When the structure is subjected to a vertical compressive load, the frame's diagonal bracing rotates inward, contracting and compressing the ends of the arc-shaped beams, generating a significant negative Poisson's ratio effect. This process forces the arc-shaped beams to bend and deform towards the center, accompanied by energy dissipation. When the displacement reaches a critical threshold, the arc-shaped beams buckle and overturn, switching to a steady state. This invention, through specific geometric configurations and differentiated material layouts, achieves morphological self-repair after impact and reuse under low-intensity conditions. This metamaterial can be arranged as a two-dimensional periodic array as a unit cell.

The utility model discloses an anti-collision device based on low-temperature steel cylinder transportation, and relates to the technical field of low-temperature steel cylinder transportation. Comprising a tank body, a protection device is arranged outside the tank body, and an adjusting device is arranged inside the protection device; according to the self-centering closed-loop locking device, the adjusting device is arranged to fix the steel cylinders with different sizes, the inner circular ring is driven to rotate in the circumferential direction to be linked with the top clamping rod set to achieve self-centering closed-loop locking in cooperation with two-way stirring driving of the locking mechanism, the structural integrity of the inner wall is effectively protected, and meanwhile the fixing requirements of the steel cylinders with different specifications can be met; and by arranging a protection device, when the low-temperature steel cylinder is installed and transported, a buffer spring arranged in a protection plate forms a buffer mechanism, and when continuous extrusion loads are coped, the contact pressure can be reduced, the surface of the cylinder body is effectively prevented from generating plastic deformation, and the anti-collision protection effect on the low-temperature steel cylinder in the cylinder body is achieved.

A separator includes: a first layer having a melting point of 950° C. or more and 2715° C. or less; a second layer having a heat conductivity of 0.02 W / m·K or more and 0.15 W / m·K or less under an environment of a temperature of 700° C. and a pressure of 0.2 MPa; and a third layer for which a compressive load acting on a test piece having a rectangular shape and a dimension of 50 mm square when viewed in a first direction is 0.7 kN or more when a thickness of the test piece is 5 mm and is 8 kN or less when the thickness of the test piece is 2.5 mm, and the first layer, the second layer, and the third layer are provided side by side in the first direction.

To provide an insulating sheet that does not experience an excessive decrease in thermal insulation performance even when subjected to a compressive load in the thickness direction. [Solution] The present invention relates to an insulating sheet 10 that can be interposed between heat sources or between a heat source and a non-heat source to reduce the thermal conductivity in the thickness direction of the sheet, and comprising at least a porous sponge sheet 11 and a layer disposed on the surface of the sponge sheet 11, which is a dispersed layer 21 of a plurality of protrusions 20, and a battery equipped therewith.

To provide a cleaning body that prevents dirt from adhering to the surface of the object to be cleaned, and that maintains its ability to adhere to the object to be cleaned for a long period of time. [Solution] The cleaning body 100 has a core body 102, a foamed elastic layer 104, and an adhesive layer 106, wherein the 25% compressive load of the foamed elastic layer 104 in the high-action region is 1 / 2 or less of the 25% compressive load of the foamed elastic layer 104 in the low-action region.

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.

A process and apparatus of producing a product having a wrought structure. The process comprises the step of: applying heat and a compressive load simultaneously to an application area of a cold spray deposition preform to transform the comprising consolidated particle structure into a wrought structure, the compressive load being applied laterally to the application area. The application of compressive load and heat to the application area raises the temperature of the material of the preform in the application area to between the recrystallisation temperature and the melting point of the material.

Protection of tubulars from premature wear in the mid-body section due to highly curved wellbores, including bowing from high axial compressive loads, or gravity induced bowing in a horizontal section of the wellbore is disclosed. It includes a method of installing a strong, wear resistant, fully encircling steel band around the midbody region of tubular joints on new and worn tubulars. Further, it does so without degrading the metallurgy or microstructure of the pipe body yet attaches the protective band with such high clamping force that it is unlikely to slip even under the most extreme service conditions. In addition, the circumferential integrity of the pipe band makes it even less likely to ever break off. A protective band includes a wear resistant hard banding weld overlay installed around the circumference of the protective band.

The application provides a lattice structure modeling method under tensile and compressive load conditions and a derived lattice structure, and realizes lattice structure design under tensile and compressive load conditions. The method comprises the following steps: designing an original solid cell structure; performing generative topological optimization on the original solid cell to obtain a lattice topological configuration under multi-directional uniform tensile load and unidirectional dominant tensile load conditions; reconstructing the lattice structure obtained by the generative topological optimization; evaluating the manufacturability of the reconstructed lattice structure; performing derivative design on the reconstructed lattice structure to improve the manufacturability and bearing capacity thereof; and after the design is completed, preparing a corresponding lattice structure and performing performance testing. The application designs a lattice structure under tensile and compressive load conditions, and reduces the performance difference between the actual manufacturing structure and the design structure through structural adjustment, so that the obtained lattice structure has higher lightweight degree, specific stiffness and specific strength, and can be widely used in the fields of automobiles, aerospace and the like.

Methods for directly bonding two or more articles of polycthcr ether ketone (PEEK) arc provided. The method includes treating bonding surfaces on the two or more articles of PEEK. The method includes placing the treated bonding surfaces of the two or more articles of PEEK into contact with each other. The method further includes heating the two or more articles of PEEK for a pre-determined time at a pre-determined temperature between 250 °C and the melting point of the PEEK. The method additionally includes applying a pre-determined compressive load to the two or more articles of PEEK during heating. Fluid handling devices, such as manifolds and filters, formed using methods of the disclosure are also disclosed.

This invention discloses a device for determining the compressive plasticity stage of recycled concrete based on acoustic emission and stress-strain analysis. The device includes: applying axial compressive loads to recycled concrete specimens under different working conditions, simultaneously measuring their acoustic emission signals and compressive stress-strain curves, and outputting an Excel spreadsheet containing the time, cumulative acoustic emission energy value, acoustic emission b-value, stress, and strain. A GUI interface is constructed using MATLAB, creating execution buttons, input boxes, result display areas, and graphical display areas. Callback functions for file selection and monitoring are defined based on the GUI interface. Acoustic emission, b-value, stress, and strain data are extracted from the specified Excel worksheet and interpolated. Functions are called to detect yield strength and the time and strain of complete failure, and the results are output. This invention can quickly detect the plasticity stage of materials by processing acoustic emission and stress-strain data, making data processing and result display more intuitive.

The invention discloses a high-temperature internal pressure tensile torsion composite fatigue test system, and relates to the technical field of material mechanical property tests.The high-temperature internal pressure tensile torsion composite fatigue test system comprises a furnace body, clamp assemblies are arranged in the furnace body, and the clamp assemblies are used for clamping the two ends of a test piece; the axial loading device is in transmission connection with the clamp assembly and can apply an axial tensile load, an axial compression load and an axial torsion load to the test piece; the annular internal pressure loading device is communicated with the clamp assembly through a pipeline and can introduce gas with set pressure into the test piece through the clamp assembly so as to apply annular internal pressure to the test piece; the temperature control device is connected in the furnace body and can heat the test piece to a set temperature; the measuring assembly can detect deformation data of the test piece in real time. According to the invention, various loads can be applied during the fatigue test, so that the high-temperature real service characteristics of the pipe can be truly reflected.

A sole structure for an article of footwear includes a cushioning component having an outer surface and at least partially defining a chamber at least partially surrounded by the outer surface. At least a portion of the outer surface has a convex shape in the absence of a compressive load of at least a predetermined magnitude on the buffer member. The sole structure includes a sole component including a protrusion extending through an outer surface of the cushioning component and extending within the cavity, or abutting with a recess in the outer surface of the cushioning component, or projecting from an inner surface of the cushioning component into the cavity.

This disclosure relates to a method and apparatus for reducing weld residual stress in steel structures with weld lines. Specifically, the method for reducing weld residual stress includes the steps of: plastically deforming a target deformation region by contacting a disk with the target deformation region and applying a compressive load to the target deformation region by means of a rotating disk, the target deformation region being a base material region near the interface between the weld bead of the weld line and the base material; and conveying the steel structure or disk such that the indentation caused by the plastic deformation extends in the target deformation region along the weld line in a continuous linear shape.

The application relates to the technical field of aircraft wing design, in particular to a variable wing of an aircraft, which comprises a leading edge, a wing body and a trailing edge connected in sequence, the wing body comprises a plurality of single cell structures, two adjacent single cell structures are connected to each other, each single cell structure comprises a chiral structure and a zero Poisson ratio structure connected to each other; all the chiral structures are arranged on a transverse section of the variable wing, each chiral structure has a tensile rotation characteristic, so that the variable wing changes the camber when subjected to tensile and compressive loads; all the zero Poisson ratio structures are arranged on a longitudinal section of the variable wing, each zero Poisson ratio structure has a tensile deformation characteristic, so that the variable wing changes the span when subjected to tensile and compressive loads. The scheme can solve the problems of small adjustable range and discontinuous shape change in the related art.

A structure fabricated by a method comprising hanging a flexible fabric from a first overhead structure in a substantially vertical orientation, wherein a portion of the flexible fabric hangs without any compressive load bearing framework engaged therewith and bears a tensile load. The method further comprises shielding a first portion of the flexible fabric to substantially block the first portion from receiving a fixative, and applying the fixative directly to a second portion of the flexible fabric that is unshielded, wherein the fixative hardens the second portion forming a fixed portion while the first portion remains flexible. The method further comprises rotating the fixed portion about the first portion acting as a hinge into a second orientation.

A seal assembly which has a housing that defines a channel. A conduit first end, of a conduit which has a central axis, extends into the channel. The conduit first end defines a tip portion of the conduit. The seal assembly further has a radial protrusion that is disposed adjacent the tip portion of the conduit first end. The seal assembly further has a seal element, which extends about the tip portion of the conduit first end. The seal element is fully enclosed by the housing, the tip portion of the conduit, and the radial protrusion. The seal assembly further has a biasing assembly, which is configured to exert an axial compressive load on the seal element via the radial protrusion and the housing. The seal element is configured to urge against the housing, the tip portion of the conduit, and the radial protrusion by the axial compressive load.

The utility model provides a corrosion test device for applying tension and compression load, which comprises a bottom plate, a loading mechanism arranged at the right end of the upper side of the bottom plate, an isolation frame arranged at the left end of the upper side of the bottom plate, a corrosion environment box arranged in the isolation frame, a left connecting rod and a right connecting rod oppositely arranged in the corrosion environment box, and clamps arranged on the left connecting rod and the right connecting rod, the left connecting rod penetrates through the corrosion environment box in a sealed mode and is connected with the tension-compression stress sensor, the tension-compression stress sensor is arranged on the inner wall of the isolation frame, and the right connecting rod penetrates through the corrosion environment box and the isolation frame in a sealed and sliding mode and is connected with the loading mechanism. The device is convenient for applying tension and compression load to the test piece in a corrosion solution and researching the influence of external load on the corrosion condition of the test piece.

The disclosure relates to a storage container (502) for use in an automated storage and retrieval system. In the system, a plurality of the containers (502) can be stacked, one on top of another. The container comprises a body part (504) formed of a non-flammable material. The body part is arranged to hold goods for storage and retrieval. The container also comprises at least one reinforcing part (506) coupled to the body part and arranged to withstand the compressive load of containers stacked on top of the container and to transmit this load to structure below the container.

The invention provides a method for calculating critical stress of a wallboard under the action of stretching and compression coupling, and belongs to the technical field of airplane structural strength analys.The method comprises the steps that a theoretical model of the wallboard under the action of stretching and compression coupling is established, and structural parameters of the wallboard are obtained; based on the theoretical model under the stretching and compression coupling effect, constructing a buckling condition expression of the wallboard under the stretching and compression coupling effect; constructing a material characteristic parameter expression, and obtaining material characteristic parameters based on the material characteristic parameter expression; constructing a critical coefficient expression, and obtaining a minimum critical coefficient under a specified compression-pull load ratio based on the critical coefficient expression; based on the critical coefficient expression and the buckling condition expression, a critical stress expression of the wallboard under the stretching and compression coupling effect is obtained, and the critical stress is obtained according to the minimum critical coefficient, the material characteristic parameter D and the wallboard structure parameter.

The invention relates to the technical field of porous lattice material forming, and discloses a buffering and energy-absorbing three-dimensional truss lattice structure design method which comprises the following steps that based on at least one predefined design strategy, a set of initial vertexes are generated in a single trigram limit, and the design strategy is used for optimizing the energy-absorbing performance of lattice unit cells; according to a symmetry rule, mapping the initial vertexes in a single trigram to other trigrams to obtain all vertexes of the dot matrix unit cells; defining a connection relationship between all the vertexes to form a truss structure, the connection relationship being configured such that the truss structure is in a bending dominant deformation mode under a compressive load; and generating a geometric model of the three-dimensional lattice unit cell based on all the vertexes and the connection relationship. Through strategy driving and rule constraint, automatic mapping from performance requirements to geometric configurations is achieved, and the defect that a traditional design method is mostly focused on elastic response or linear behaviors and cannot be suitable for reverse design with energy absorption as the target is overcome.

A vertically-elongated member, which is preferably a support post used in a molten metal pump, includes a ceramic tube and tensioning structures to add a compressive load to the tube along its longitudinal axis. This makes the tube less prone to breakage. Another vertically-elongated member, such as a support post, includes one or more reinforcement members to help alleviate breakage. A device, such as a pump, used in a molten metal bath includes one or more of such vertical members.

This invention belongs to the field of material performance evaluation, and relates to a method and storage medium for assessing the remaining fatigue life of a temperature-compensated corrugated pipe for GIS pipelines. Based on finite element simulation analysis data of the temperature-compensated corrugated pipe under internal pressure and axial tensile-compressive loads, the method calculates the fatigue damage caused by daily thermal expansion and contraction of the corrugated pipe using stress fatigue life data of the corrugated pipe material and measured GIS pipeline temperature or axial deformation of the corrugated pipe, thus assessing its residual fatigue life. This invention uses the finite element method to pre-calculate the stress components in the critical area of ​​the corrugated pipe under internal pressure loads and axial deformation loads caused by thermal expansion and contraction, effectively avoiding the problem of difficulty in installing stress sensors to obtain measured data due to structural limitations.

The present invention provides a thermally conductive composition having a high thermal conductivity with the compressive load and the degree of plasticity being kept low, a thermally conductive sheet using the thermally conductive composition, and a method for producing the thermally conductive sheet. The thermally conductive composition contains a matrix resin (component A) made of a thermosetting resin, a curing catalyst, and thermally conductive particles (component B). 1500 to 3000 parts by mass of the component B is blended with respect to 100 parts by mass of the component A. The component B includes the following components B1, B2, B3, and B4. The component B includes, relative to the total amount of the component B, 10 to 20 mass % of aluminum nitride with a median diameter (D50) of less than 20 μm (component B-1); 3 to 9 mass % of aluminum nitride with D50 of 20 μm or more (component B-2); 50 to 60 mass % of alumina with D50 of 60 to 80 μm (component B-3); and 11 to 37 mass % of alumina with D50 of less than 60 μm (component B-4). The blending ratio (B-1) / (B-2) of the component B-1 to the component B-2 in terms of mass is 1.2 to 3.

The utility model provides a compression-resistant buffering punched aluminum veneer which comprises an aluminum veneer body, a plurality of punched holes formed in the aluminum veneer body and a plurality of fixing assemblies arranged on the outer edge of the aluminum veneer body. The first buffer layer set and the second buffer layer set are arranged on the upper side and the lower side of the aluminum alloy base material respectively, the first buffer layer set and the second buffer layer set are made of elastic materials and are fixed to the aluminum alloy base material through the fixing assemblies, and therefore the impact resistance and the compressive load resistance of the aluminum veneer can be effectively improved, the service life of the aluminum veneer is prolonged, and the service life of the aluminum veneer is prolonged. The service life of the aluminum veneer is prolonged, deformation, cracking and even breaking of the veneer body caused by prolonging of the service life are avoided, the aluminum veneer can be effectively prevented from being deformed after being impacted and collided for multiple times in the aluminum veneer transportation process, the occurrence rate of quality problems in the aluminum veneer transportation process is reduced, the use experience of a user is improved, and the advantages of being simple in structure and convenient to use are achieved. Operation is simple, and popularization and implementation are convenient.

The body protection (1, 1') comprises: a wearable article (2, 2'); an impact absorbing pad (3) anchored to the wearable article (2, 2'); wherein the impact absorbing pad (3) comprises a first member (4) configured to absorb impact energy by irreversible plastic deformation and a second member (5) configured to absorb impact energy by reversible elastic deformation, and wherein the first member (4) is embedded into the second member (5); wherein the first member (4) comprises a plurality of open cells (6) interconnected to each other via their side walls (7) to form a pliable sheet (8) configured to absorb energy by irreversible deformation of said side walls (7) or said interconnections in response to a compressive load applied to said sheet (8). The wearable article (2) is a glove (2'), wherein the impact absorbing pad (3) is anchored to the back of the glove (2').