37 results about "Simple shear" patented technology

The invention discloses a movable plate stacking ring shearing apparatus capable of adapting to free shearing deformation and belongs to the mechanical characteristic test equipment. The movable plate stacking ring shearing apparatus comprises a bracket, a lower shearing box, a stacking ring set shearing box, a vertical loading unit, a horizontal loading unit and a measuring unit, wherein the bracket consists of a bottom plate and a stand column; the lower shearing box and the stacking ring set shearing box are stacked between the bottom plate and the vertical loading unit in sequence; the vertical loading unit is fixed on the stand column; the horizontal loading unit is fixed on the bottom plate. According to the movable plate stacking ring shearing apparatus capable of adapting to free shearing deformation, a movable plate shearing frame capable of adapting to free shearing deformation can be used for performing a simple shear test and a direct shear test and also can be used for performing a pull-out test on geogrid, geotechnical cloth and the like. When the simple shear test is performed, the vertical loading unit can provide three normal boundary conditions of normal displacement, normal rigidity and normal stress, and the horizontal loading unit can be used for providing horizontal shearing force. The movable plate stacking ring shearing apparatus is delicate in design, convenient to operate, easy to assemble and disassemble, and capable of precisely performing research on shearing deformation characteristic between contact surfaces of geotechnical materials and structures.

The invention discloses a combined dynamic triaxial dynamic simple shear pressure chamber system capable of measuring radial strain of a soil sample, and belongs to the geotechnical engineering test device technical field. The sample (8) is mounted in a water pressure chamber through sample cover bodies (6) having a drainage function; an axial loading system comprising an axial servo electrical controller (20), an axial piston rod (21), an axial pressure sensor (19) and an axial displacement sensor (2) applies an axial pressure on the top of the sample (8); a horizontal loading system comprising a horizontal servo electrical controller (17), a horizontal piston rod (13), a horizontal pressure sensor (15) and a horizontal displacement sensor (14) applies a horizontal shearing force on the bottom of the sample (8). On the basis of a conventional combined dynamic triaxial dynamic simple shear apparatus, the radial strain of the soil sample under action of the axial and horizontal load is measured simultaneously. Universality of the combined dynamic triaxial dynamic simple shear apparatus is improved, and measured data is accurate.

The invention discloses a device for testing the mechanical properties of a thin sheet under simple shear loading. The device comprises a base, a left clamp assembly and a right clamp assembly oppositely arranged along the length direction of the base in parallel, a slider, and a fixing block of a concave structure, wherein the right clamp assembly is fixed on the slider; the slider is embedded in the fixing block; the fixing block is fixed on the base; the slider can slide on the fixing block to enable the right clamp assembly to move close to or away from the left clamp assembly; a draw barfor adjusting the distance between the left clamp assembly and the right clamp assembly is arranged between the fixing block and the slider; the left clamp assembly is fixed on a core; the core is fixed on the base through a second rail assembly; and the core can slide freely along the length direction of the base through the second rail assembly. Through the reasonable structure design, the device can achieve the more stable measurement in the thin sheet simple shearing test, and can flexibly adjust the distance between chucks clamping the sheet, thereby obtaining more accurate test data, and providing a method for studying the mechanical properties of the thin sheet under complex loading state.

The invention discloses a high-precision geotechnical single-shear instrument and a use method thereof. Grooves are arranged on the outer wall of each shear ring in the upper shear stack ring group, and a plurality of horizontal displacement sensors and a lower horizontal displacement sensor box are arranged in the horizontal displacement sensor box. The shearing box and the upper shearing ring group are connected; two vertical displacement sensors are placed on the loading top cover; the horizontal electromagnetic exciter is fixed on the base through a jack; the shearing box is connected to the horizontal electromagnetic exciter The level pipe is arranged on the dowel rod horizontally of the device. When in use, the shear force is guaranteed to be applied in the horizontal direction through jack adjustment and level pipe monitoring; the shear displacement generated by each shear ring in the lower shear box and the upper shear stack ring group is collected through the horizontal displacement sensor box; A vertical displacement sensor collects the normal displacement of the sample in the upper shear stack ring group under the action of cyclic shear force. The invention has a simple structure, is easy to implement, and can measure the deformation characteristics of the contact surface between the soil and the structure with high precision.

The invention relates to a simple shear connection structure pin load vector measuring method and a measuring instrument thereof. The measuring instrument is formed by processing an ordinary bolt. Four strain gauge pasting grooves are processed on the contact surface of the bolt and a bolt hole, positions of the strain gauge pasting grooves are evenly distributed on the contact surface and respectively located at both ends of two perpendicular diameters. A strain gauge group is pasted axially along the bolt in each strain gauge pasting groove, each strain gauge group is formed by two strain gauges, and the two strain gauges and the bolt axially form an angle of +45 degrees and an angle of -45 degrees. The upper end of each strain gauge pasting groove is provided with a wire leading hole used for leading a wire out of each strain gauge. Due to the fact that the two strain gauges of +45 degrees and -45 degrees in each strain gauge group have a common wire, each wire leading hole needs to lead three wires out, and the total number is 12. The led wires of the strain gauges which are led out are connected on a strain measuring instrument. The measuring instrument achieves direct measurement of simple shear connection structure pin load size and orientation and pin axial force, and is directly formed by processing a standard bolt, low in cost and wide in application scope.

The invention relates to a splicing method for a reflection panel in a honeycomb sandwich structure. The method provided by the invention comprises the following steps: determining the shape and positioning mode of splicing seams of an aluminum plate, splicing and laying the sandwich structure layer by layer and repairing the splicing seams, wherein the splicing seams of the aluminum plate in a sandwich plate are in a Great Wall shape; after modeling, blanking figures are respectively obtained through expanding splicing curved surfaces; after the layout processing, a production blank is obtained; the sandwich structure which is spliced and laid side by side is the core course of manufacturing a sandwich plate; and the repairing of the splicing seams comprises the repairing for the splicing seams of a working plate and the simple shear splicing of a back plate. The method provided by the invention solves the problem that the manufacturing dimension of the panel is limited by the dimension of a raw material and can ensure that the profile accuracy of the working surface of the sandwich plate fully meets the design requirements; the rigidness of the panel can be maintained to the maximum limit through the transverse-longitudinal intersection of the splicing seams; and the repairing of the splicing seams can effectively repair the discontinuity of the working plate because the seams exist, ensures the electric properties of a reflection surface and improves the splicing intensity and tightness of the seams of the back plate.

The present invention relates to a process for the separation of gluten and starch from wheat flower, wherein in a first step the wheat flour is converted into a dough having a moisture content of less than 50 wt %, based on dry weight of the flour. The dough is in a subsequent step subjected to an essential simple shear flow with a shear stress of at least 1 kPa and a specific mechanical energy input of at least 5 kJ / kg per minute processing time to obtain a processed dough. It is preferred that the apparatus used for performing this step comprises a reactor of the cone-and-plate type or the cone-cone-type wherein an absolute velocity profile across the conical gap is present. In a final step, the processed dough is separated into a gluten enriched fraction and a starch enriched fraction. The gluten enriched fraction is very suitable for bakery applications.

The present invention relates to a rheometric device which provides a direct visualization of the subject material. The device also determines the velocity and / or the strain field across the thickness and the morphology to be determined across the same gap. The invention relates both to a device and / or method that can be used in connection with current shearing rheometers, and similar apparatus. The present invention also relates to a process for making a shear rate measurement. The invention provides versatility by allowing multiple angles of visualization which properly characterizes the flow characteristics and shear rates involved.

A mechanical duty bellows seal is constructed from a number of annular rubber diaphragms of comparatively thick cross-section alternately bonded to a series of outer and inner metal hoops so that the hoops hold the rubber diaphragms in simple shear during flexure of the bellows. The stresses in the rubber in shear are predictable thus allowing the calculation of diaphragm proportions to control stress levels.

The invention relates to the technical field of hydraulic and civil engineering, particularly a large-size high-precision simple shear apparatus structure which comprises a base platform, wherein a metal plate is arranged on the base platform; the upper surface of the metal plate is integrally connected with guide plates; rolling shafts are arranged between the guide plates; a concrete block is previously arranged above the rolling shafts; the upper part of the concrete block is provided with laminated plates; the laminated plates are provided with locating holes and locating bolts; a sample placement bin is provided with a pressure transfer plate; a supporting frame is arranged across the base platform; the supporting frame comprises two support columns; a support cross bar, which is arranged across the base platform and positioned above the laminated plates, is fixed between the support columns; the position on the lower surface of the support cross bar adjacent to the center is fixed with a vertical lifting jack; one side of the base platform adjacent to one end of a guide channel is provided with a transverse lifting jack; one side of the laminated plates opposite the transverse lifting jack is provided with a load sensor and a displacement meter; and a normal load sensor is arranged above the upmost laminated plate. The large-size high-precision simple shear apparatus structure has the advantages of firm structure, stable operation and high test accuracy, and is convenient to operate.

The invention discloses a steel-concrete push-out test loading device capable of applying tension and pressure. The steel-concrete push-out test loading device comprises a horizontal loading mechanism, a horizontal sliding mechanism and a vertical loading mechanism. The horizontal loading mechanism comprises a horizontal counter-force frame, a horizontal force loading device, a containing platformand a front counter-force plate. The horizontal force loading device is mounted on the horizontal counter-force frame, and the front counter-force plate and the horizontal counter-force plate are oppositely arranged on the containing platform. Horizontal sliding grooves are formed in the two sides of the containing platform. The horizontal sliding mechanism can move back and forth along the horizontal sliding grooves. The vertical loading mechanism is mounted on the horizontal sliding mechanism and achieves vertical loading. According to the device, the negative factors that a push-out test component is large in size and weight, is limited by test sites and can only carry out simple shear force loading are overcome, and wide development prospects are achieved.

The present invention is generally directed to a method for measuring interfacial stick-slip transitions (SST) and an improved constant-force shear capable of measuring interfacial SST. Some embodiments are capable of measuring SST under simple shear conditions and / or in highly entangled polymer melts. Some embodiments include the application of a constant shearing force to a polymer sample.

The invention relates to a simple shearing test method and device for a rock-concrete cement face. A to-be-detected rock-concrete cement test piece is vertically arranged, a horizontal shearing force is applied on the rock-concrete cement face through a power transmission screw rod, and maximum strain of a sensor during the shearing process is collected by the strain sensor arranged on the power transmission screw rod; the axial lines of the power transmission screw rod and the strain sensor are positioned on the same horizontal line, and a cambered surface attached to the power transmission screw rod is arranged at the bottom of the strain sensor. The device coordinates with a press to work, the axial load is applied through the press, the power transmission screw rod is screwed in to apply a shearing load to achieve the shearing of the rock-concrete cement surface, the operation is simple, and the use is convenient.

The invention provides a simple shear test remolding soil sample preparation device and a preparation method thereof. The method comprises the following steps: measuring a physical parameter of the soil sample, and computing the sand sample quality; performing sample loading by adopting vacuum pumping method and a wet-loading method, and controlling the uniformity and the compactness of the sample; dismounting a split-die by matching a detachable cored screw at the upper part of a top cap, and mounting a simple shear ring; and performing saturation on the sample by adopting the vacuum pumpingmethod, the carbon dioxide and hydraulic saturation. The sample prepared through the preparation device provided by the invention is good in uniformity and high in repeatability; the saturation can beperformed on the sample in a pressure room, the technical problem that the sample cannot be saturated in the pressure room since the conventional simple shear teat remolding sample is bad in uniformity and low in repeatability is solved, thereby providing foundation for developing the soil body static and dynamic characteristic study based on the simple shear test.

An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.

The present invention relates to a rheometric device which provides a direct visualization of the subject material. The device also determines the velocity and / or the strain field across the thickness and the morphology to be determined across the same gap. The invention relates both to a device and / or method that can be used in connection with current shearing rheometers, and similar apparatus. The present invention also relates to a process for making a shear rate measurement. The invention provides versatility by allowing multiple angles of visualization which properly characterizes the flow characteristics and shear rates involved.

The invention discloses an in-situ simple shear apparatus, which consists of a shearing device and a data acquisition device, wherein the shearing device comprises a stress application mechanism, a pressure sensing mechanism and a shearing mechanism; the data acquisition device is connected with the pressure sensing mechanism in the shearing device through a data line; the stress application mechanism comprises a speed reducer shell, a worm, a speed reducer handle, a worm wheel and a spline; the worm is arranged in the speed reducer shell and an input end of the worm penetrates through the speed reducer shell to the exterior of the speed reducer shell; the speed reducer handle is positioned outside the speed reducer shell and is in drive connection with the input end of the worm; the worm wheel is arranged in the speed reducer shell and is engaged with the worm; the spline is inserted in the worm wheel; the upper end face of the spline is provided with a dowel bar; and the lower end face of the spline is provided with a screw hole for being connected with the shearing mechanism. The stress application mode in the invention is the same as the lifting direction of a lifting rod, and the trend of torque is not produced to a core sample, so that the in-situ simple shear apparatus is more labor-saving to use and has a more compact and more rational structure and more attractive appearance.

The invention discloses a preparation method of cream emulsion with a baking flavor. Cream with a baking flavor can be obtained after common cream is treated with special yeast, then proper materials like an emulgator are added, and the cream emulsion with a baking flavor is obtained through a simple shearing technology. The cream product prepared through the preparation method is different from an existing product in the market in fragrance and flavor and has a baking flavor; besides, the cream product is generated through a natural fermentation process, no artificially-synthesized perfume is added, and the flavor is coordinated. The technology of the emulsion preparation process is simple, high-pressure homogenization is not needed, and only simple shearing is needed; compared with a traditional emulsion preparation process, equipment input is small, and energy consumption is low. Although the technology is simple, the prepared emulsion product is stable and can be stored for 12 months or longer within 0-50 DEG C without demulsification. The cream emulsion obtained through the preparation method has water solubility and is wide in application range and suitable for various drink systems, and it can be guaranteed that a product with the cream emulsion is free of any oil slick or sediment within the shelf life of 1 year.

The invention relates to a large-scale cyclic simple shear test apparatus. The apparatus comprises a base. A column and a top beam are arranged on the base. A vertical pressurized oil cylinder and a loading top plate are arranged on the bottom of the top beam. One end of the base is provided with a horizontal counterforce bracket, which is connected to a horizontal pressurized oil cylinder. A loading bottom plate is arranged on the push rod of the horizontal pressurized oil cylinder. A soil bearing box is formed by laminating a plurality of constraining steel rings. The external side of each constraining steel ring is provided with a support lug. The upper surface and lower surface of each support lug are both covered by a layer of rubber gasket. The provided large-scale cyclic simple shear test apparatus can carry out simulation tests of large-size rock samples.

The invention discloses a precise shearing blanking device. The precise shearing blanking device comprises a base, a stepping feed mechanism, a locking mechanism and a shearing mechanism. The stepping feed mechanism is fixedly arranged in the position, at the rear end of a material path, of the base. The locking mechanism comprises a clamping head seat, a clamping power part, an upper clamping head and a lower clamping head; the clamping head seat is connected with a movable rod of the stepping feed mechanism so that the clamping head seat can be pushed to move in the extending direction of the material path; the upper clamping head is fixedly arranged on the clamping head seat above the material path between the stepping feed mechanism and the shearing mechanism; the lower clamping head is arranged below the material path corresponding to the upper clamping head; and the clamping power part is fixedly arranged on the clamping head seat, and a driving rod is connected with the lower clamping head so that the lower clamping head can be pushed to move in the direction perpendicular to the material path. The shearing mechanism is fixedly arranged on the base above the front end of the material path and used for shearing a material. According to the precise shearing blanking device, the material is located through the locking mechanism and is precisely fed and positioned through the stepping feed mechanism, and finally, blanking is completed. The precise shearing blanking device has the characteristics of being simple in structure, precise and reliable in shearing positioning, high in production efficiency and flexible and convenient to adjust.

An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.

The present invention is generally directed to a method for measuring interfacial stick-slip transitions (SST) and an improved constant-force shear capable of measuring interfacial SST. Some embodiments are capable of measuring SST under simple shear conditions and / or in highly entangled polymer melts. Some embodiments include the application of a constant shearing force to a polymer sample.

The invention discloses a simple shear for garden beautification. The simple shear comprises a sleeve with one annularly closed end, a stretching rod with at least one end extending out of a sleeve and wrapped by the sleeve and two blades with handles. One end of the stretching rod extends out of the closed annulus of the sleeve, a circle of protrusion is arranged at the position, close to the closed annulus, of the stretching rod, and a spring part is arranged between the protrusion and the closed annulus. Through holes are formed in the handle ends of the blades, a pair of triangular fixingracks is arranged at the non-annularly-closed end of the sleeve and is provided with through holes I, and the through holes and the through holes I are connected to two ends of a middle part. The middles of the two blades are correspondingly provided with fixing holes, connecting rods provided with fixing holes I at ends are fixed in the fixing holes of the two blades, and the other end of each connecting rod is fixed to the corresponding end of the stretching rod. The simple shear is convenient to operate, and opening and closing of the blades can be controlled only by pulling the stretchingrod.

The present invention relates to a process for the separation of gluten and starch from wheat flower, wherein in a first step the wheat flour is converted into a dough having a moisture content of less than 50 wt %, based on dry weight of the flour. The dough is in a subsequent step subjected to an essential simple shear flow with a shear stress of at least 1 kPa and a specific mechanical energy input of at least 5 kJ / kg per minute processing time to obtain a processed dough. It is preferred that the apparatus used for performing this step includes a reactor of the cone-and-plate type or the cone-cone-type wherein an absolute velocity profile across the conical gap is present. In a final step, the processed dough is separated into a gluten enriched fraction and a starch enriched fraction. The gluten enriched fraction is very suitable for bakery applications.

The invention discloses linear groove opening pincers. The pincers comprise a left pincer body and a right pincer body which are connected together in a pivotal manner. Two shear knives used for forming shear grooves are arranged on the head portion of the left pincer body. Pressure heads used for being matched with the shear grooves and moving in the shear grooves relatively are arranged on the head portion of the right pincer head. Edge openings are formed in the front ends and the side edges of the pressure heads. Edge openings are formed in the inner sides, opposite to the pressure heads,of the shear knives. According to the linear groove opening pincers, linear groove openings can be formed in metal thin plates like an aluminum alloy groove plate, and groove plates conveniently, useis simple, shorn openings are standard and attractive, shearing is efficient, labor is saved, efficiency is high, machining is convenient, and service life is long.

The invention relates to a method for elastic wave mode separation. An elastic wave comprises two modes including a shear wave and a compression wave. The method comprises the following steps: a new hookean material in a natural state is provided; the new hookean material is provided with a first surface and a second surface; the second surface is opposite to the first surface and parallel to the first surface; the new hookean material is enabled to be deformed; the deformation means that relative displacement is generated between the first surface and the second surface in the direction parallel to the first surface, so that simple shear deformation or approximately simple shear deformation is formed; the elastic wave enters from the first surface and exits from the second surface; the shear wave and the compression wave, which are separated, can be received at different positions of the second surface. The method is simple, and can realize the nondestructive separation of the shear wave and the compression wave. The invention further relates to a system, adopting the method, for elastic wave mode separation.

The embodiment of the invention provides a method and system for obtaining a wall surface slip curve based on a parallel plate rheological test. The method comprises the steps of employing a rotational rheological test of a parallel plate structure, setting the radius of a rotor as a fixed value in a testing process, and setting the rotating speed of the rotor, the material of a shearing surface and the spacing of the shearing surface as variables; when the change of the rotating speed of the rotor is detected, carrying out error-free compression on a flow field with an invariable flow field topological structure to obtain a simple shear flow field model; and obtaining a wall surface slip curve according to the simple shear flow field model. According to the embodiment of the invention, arotational rheometer additionally provided with a parallel plate structure is used for testing, required data can be directly provided by the rheometer, and compared with a traditional pipeline pressure flow mode, the mode is simpler, the required sample quantity is smaller, and the instrument is simpler to clean and maintain; on the premise of not substituting the fluid and slip model, the original data is directly subjected to differential processing, the research problem is simplified into simple shear flow, and meanwhile, the accurate description of the original flow field is reserved.

The invention discloses a pair of simple pulley reinforcing steel bar scissors. A force increasing mechanism is added for a pair of ordinary knife type steel bar scissors by adopting a simplified pulley block, and the shearing force of a pair of traditional manual knife type steel bar scissors is increased. The pair of simple pulley force-increasing steel bar scissors has the advantages of simple structure, convenience in use, low cost and no use of any energy source and can be widely applied to shearing metal wires.

An embodiment of the present invention provides a method and system for obtaining a wall slip curve based on a parallel plate rheological test. The method includes: using a parallel plate structure for a rotational rheological test, and setting the rotor radius to a constant value during the test, The rotational speed of the rotor, the material of the shear plane and the distance between the shear planes are set as variables; when the rotational speed of the rotor is detected, the flow field with the same topological structure of the flow field is differentially compressed to obtain a simple shear A flow field model; according to the simple shear flow field model, a wall slip curve is obtained. The embodiment of the present invention uses a rotational rheometer with a parallel plate structure to test, and the required data can be directly provided by the rheometer. Compared with the traditional pipeline pressure flow mode, it is simpler and requires less sample volume. Instrument cleaning and The maintenance is simpler; on the premise of not substituting the fluid and slip model, the original data is directly differentiated, and the research problem is simplified to a simple shear flow, while retaining the accurate description of the original flow field.