70 results about "Cyclic shear" patented technology

The invention is a large multifunctional frozen soil-structure interface cyclic direct shear apparatus and a test operation method. The structure of the apparatus comprises a horizontal and vertical loading system, a horizontal and vertical displacement and a load sensor, a temperature control and refrigeration system, a temperature sensor, a data collecting and self-stabilizing system, a guide rail system, and a soil sample box and supports. The test operation method comprises the steps of: 1. Installing the interface steel of required roughness; 2. Applying normal boundary conditions to a soil sample; 3. Cooling the soil sample; and 4. When the temperature cools to a target temperature, performing a shearing to the frozen soil interface in a selected shearing speed, at the same time the date collecting system beginning to record the stress-strain relation of the frozen soil interface. The apparatus and the method are the advantageous in that: 1) accurate control of the interface temperature in the temperature range between 0 DEG C and -20 DGE C can be achieved; 2) three normal boundary conditions of constant stiffness, constant displacement and constant stress can be accurately applied; 3) interfaces of various roughness can be simulated; 4) two shear modes of cyclic shear and monotonic shear can be realized; and 5) the stress applying and displacement control are accurate.

The invention relates to a testing device for vertical cyclic compression-lateral swing shearing dynamic loading. The testing device comprises a peripheral frame, a model case arranged in the peripheral frame, a loading unit for loading the model case and a data acquisition unit for acquiring testing data of a soil test sample in the model case, wherein the soil test sample fills the model case; the loading unit comprises a vertical dynamic load actuator which applies a vertical dynamic load, a lateral swing dynamic load actuator which applies a lateral swing horizontal shearing dynamic load and a lateral pressure loading unit which controls a confining stationary load of the model case. Compared with the prior art, the device provided by the invention can independently apply a horizontal rotating cyclic dynamic load to realize cyclic shearing dynamic load, and can be independently loaded or coupled with the vertical cyclic dynamic load. Moreover, the device is simple in structure, easy to assemble and detach and simple and convenient to operate in the experimental process.

The invention discloses a cyclic shear apparatus which belongs to mechanic characteristic testing equipment and is used for observing the mechanical characteristic of the contact surface between structural member and soil. The cyclic shear apparatus consists essentially of a soil container vehicle which is arranged inside a bracket, a normal boundary control unit, a data collecting system and a hydraulic loading and control system which is fixed on the bracket; the soil container vehicle is arranged on a horizontal track on the internal bottom surface of the bracket; testing soils are fully filled in the vehicle where a structural panel is horizontally arranged; the normal boundary control unit is arranged on the upper surface of the structural panel; furthermore, the soil container vehicle is provided with an organic glass window. The cyclic shear apparatus can lead the static and dynamic mechanical characteristic of the contact surface under complicated stresses to reappear; furthermore, the cyclic shear apparatus directly exerts normal boundary conditions on the contact surface and measures the deformation of the contact surface due to bearing force, thus improving the testing and measuring precision; digital photography is used for directly recording the microscopic phenomena of the soil gains such as microscopic state arranging, sliding of the gains along the long axis direction and along the structural surface, rotating of the gain, and crushing of the gains, etc. so as to facilitate the analysis; furthermore, the cyclic shear apparatus can further determine the distribution of relative displacement of the soil and structural member along the contact surface and the thickness of the contact surface.

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.

A electrochemical biosensor based on an aptamer/nano silver probe and an EXO I enzyme. Nano silver nanoparticles having the functions of identifying a target object and generating electrochemical signals and modified by an aptamer are used as a biological probe for detecting target biomolecules, under the initiation of the target object and the assistance of a complementary probe and the EXO I enzyme cyclic shear amplification, and by means of the DNA complementary pairing principle, the probe can be gathered on the surface of a gold electrode, the larger the concentration of the target biomolecules is, the larger the gathering degree of the induced aptamer/nano silver probe is, and meanwhile an EXO I exonuclease target cyclic amplification strategy is introduced in the identification process of the target object, so that the electrochemical biosensor can sensitively and efficiently detect target biological substances.

The invention discloses a hoist spindle reliability analysis, calculation and evaluation method. The method comprises the following steps: S1, strain parameters of the hoist during one hoisting process are detected; S2, cyclic principal stress and cyclic shear stress applied to a drum wheel disc are obtained through the strain parameters; S3, the joint force for a force node is analyzed, torques when the drum wheel disc acts on two load action points of the hoist spindle and a torque when a motor acts on the hoist spindle are analyzed; and S4, a spindle flexural torque diagram and a torque diagram for the hoist spindle are obtained, a distortion energy density criterion for a dangerous section strength formula: a square root of (sigma<2>+3tau<2>)<[sigma] serves as a basis for spindle reliability design, and reliability calculation and evaluation are carried out. According to the hoist spindle reliability analysis, calculation and evaluation method disclosed by the invention, a perturbation method is adopted for reliability design, uncertainty of the load is considered, a reliability index is easy to solve, and more practical value is provided for reliability analysis on the hoist spindle.

The invention discloses a dynamic and cyclic direct shear test method for rock mass structural planes, comprising a dynamic direct shear test method for rock mass structural planes and a cyclic directshear test method for rock mass structural planes. The dynamic direct shear test method for rock mass structural planes comprises a uniform speed on-way direct shear test method for rock mass structural planes and a variable speed one-way direct shear test method for rock mass structural planes. The cyclic direct shear test method for rock mass structural planes comprises a cyclic one-way directshear test method for rock mass structural planes, a two-way cyclic direct shear test method for rock mass structural planes, and a loading/unloading direct shear test method for rock mass structuralplanes. The dynamic and cyclic direct shear test method for rock mass structural planes can be applied to the dynamic direct shear test system of rock mass structural planes to test the dynamic and cyclic shear characteristics of the structural planes, so as to achieve different research purposes.

Systems and methods for forming patterns and structures in target materials are described. The method produces a pattern or structure in a target material by contacting a stamp including one or more features with a target material using a normal load sufficient for keeping the one or more features in contact with the target material, and providing a cyclic shear force in an amount sufficient to extrude the target material and form a negative relief of the one more features in the target material. The systems and methods can be used to produce a variety of articles including, but not limited to, semiconductor integrated electrical circuits, integrated optical, magnetic, mechanical circuits and microdevices.

The invention provides a deep saturated sand earthquake-induced liquefaction judgment method, which comprises six steps: 1) determining standard penetration numbers of a deep saturated sand layer at different positions and in different depths; 2) determining seismic cyclic shear stress ratio CSR of different standard penetration test points of the deep saturated sand layer; 3) determining actual critical overlying effective stress of standard penetration test through a hypothetical test method; 4) obtaining normalized standard penetration numbers of the different standard penetration test points at different positions and in different depths; 5) determining liquefaction-resistance cyclic shear stress ratio CRR7.5; and 6) making a comparison between the seismic cyclic shear stress ratio CSR and the liquefaction-resistance cyclic shear stress ratio CRR7.5, and carrying out earthquake-induced liquefaction judgment. The method can overcome the defect that a standard penetration number liquefaction judgment method in the current specifications cannot be applied to the soil layer, the depth of which is larger than 20m, and can enable the existing standard penetration number liquefaction judgment method to be expanded and applied to deep saturated sand earthquake-induced liquefaction judgment.

The invention discloses a biaxial shear test method of a fabric membrane material. The method comprises steps as follows: S1, a cross-shaped biaxial shear test piece is manufactured from the fabric membrane material, so that the included angle between the warp/weft direction of the fabric membrane material and a cross-shaped spindle of the test piece is 45 degrees; the cross-shaped spindle comprises an x axis and a y axis which are perpendicular mutually; S2, a biaxial shear loading spectrum of the fabric membrane material is defined according to parameters of the cross-shaped biaxial shear test piece, and the biaxial shear loading spectrum of the fabric membrane material is used for the cross-shaped biaxial shear test piece. According to the method, the biaxial shear loading spectrum can realize graded cyclic shear load and cyclic pre-shear load of positive and negative stress contained in a shear stress ring. The method can be used for measuring and representing the biaxial shear rigidity and mechanical behavior of the fabric membrane material and can be applied to the building fabric membrane material, airship fabric skin and other industrial fabric fields.

The invention discloses a testing device and method for the shear modulus of a geotextile interlayer of an asphalt concrete structure. When the shear modulus is tested, a test piece of asphalt concrete structure to be tested is located between two side clamp plates, a loading spring fixed to the two side clamp plates applies required lateral pressure to the test piece to be tested. A cyclic shearload is applied by a loading plate, and relative displacement caused by cyclic shear force is monitored by four displacement sensors. The whole testing device is connected with a base through two fixing beams and fixing bolts. According to the size of the test piece, the applied load and the relative displacement recorded by the displacement sensors, the shear modulus of the geotextile interlayerunder specific testing temperature, loading frequency and lateral pressure conditions can be calculated. The testing device is simple in structure and low in cost, and the testing method is easy to master. The problems of testing the shear modulus of the geotextile interlayer in the asphalt concrete structure under different temperature, lateral pressure and loading frequency conditions are solved.

The invention provides a cyclic shear tester for rock mass structural planes. The cyclic shear tester comprises a basic support system, a cyclic load system, a normal-direction load system and a sheartest system. The cyclic load system, the normal-direction load system and the shear test system are mounted in the basic support system, continuous cyclic shear load can be provided to tests by the cyclic load system, stable normal-direction load can be provided to the tests by the normal-direction load system, rock mass structural plane test specimens can be protected by the shear test system, and the shear test system can be used for carrying out cyclic shear tests. The invention further provides a test method implemented by the aid of the cyclic shear tester. The test method includes mounting the test specimens; applying stress; modulating amplitudes and frequencies; carrying out cyclic shear; computing dynamic shear stress; analyzing data. The cyclic shear tester and the test method have the advantages that the shortcoming of discontinuity defects of the traditional methods can be overcome by the aid of the cyclic shear tester and the test method; the test amplitudes and frequencies can be regulated and controlled, and the test efficiency and precision can be effectively improved.

The invention discloses a device and a method for testing the double contact cyclic shear of a flexibly-tensioned geomembrane and soil. A geomembrane shearing frame is connected with a flexible tensioning system, a motor drives gears to rotate forward and reversely to drive a chain horizontally to move back and forth with the geomembrane shearing frame, the device and the method are used for testing the double contact shear strength of the geomembrane and soil at different cyclic displacements of a simulated geomembrane under the action of normal stress, the chain of the flexible tensioning system is flexibly connected with the geomembrane shearing frame, and the test method can be used to detect the changing curve of the double contact shear strength of the geomembrane shearing frame withshear displacement under different normal stresses and different shear displacement amplitudes in order to obtain the change relationship of the cyclic shear strength and the damping ratio of the contact interface of the geomembrane and soil with the shear displacement.

The invention discloses a regenerated high-performance lubricating grease of waste internal combustion engine oil and a preparation method thereof. The preparation method comprises the steps of adding deep refined waste internal combustion engine oil and fatty acid into a reaction container, slowly heating till the fatty acid is completely dissolved, dissolving lithium hydroxide into water and then adding the solution into a reaction kettle, performing saponification for 2-3 hours at 100-110 DEG, heating to 140 DEG C, adding 1/4 of the formula quantity of the waste internal combustion engine oil, heating to 190-210 DEG C, refining at a high temperature for 10-20 minutes, adding the remaining waste internal combustion engine oil, cooling to be below 160 DEG C, adding an antioxidant, an extreme pressure agent, an oiliness agent and a thickening agent, then performing post treatment with a homogenizer or by cyclic shearing, filtering and packing. The produced lubricating grease has the characteristics of multiple effects, universality and the like, also has good lubricating performance and extreme pressure anti-wear performance, and can meet the requirements of most bearings for lubrication and protection and realize low-cost recycling of the waste internal combustion engine oil.

The invention relates to a preparation method of soybean milk powder. The preparation method of the soybean milk powder takes whole soybean meal as a raw material, and comprises the following steps: mixing the whole soybean meal with water at ratio of 1 to (3-8), adjusting the pH value to 6.5-7.3, and respectively carrying out first cyclic shear extraction and second cyclic shear extraction so asto obtain a soybean emulsion; and then, performing sterilization on the soybean emulsion, and carrying out flash steaming, concentrating, blending, homogenizing, drying and the like so as to obtain the soybean milk powder. The preparation method of the soybean milk powder disclosed by the invention is improved in production efficiency by changing traditional processes; and the prepared soybean milk powder is relatively high in contents of water-soluble dietary fiber and proteins, and has the function of regulating intestinal flora balance. The soybean milk powder is rich in nutrients. Being brewed, the soybean milk powder produces mellow soybean aroma but light peculiar bean smell.

The invention relates to the field of pile foundation engineering technologies, in particular to an air-contained soil pile soil testing device. The device comprises a sealing cabin and an axial pressure testing device, wherein a test soil sample and a precast pile in mutual contact are arranged in the sealing cabin; the axial pressure testing device extends into the sealing cabin to drive the precast pile and the test soil sample to take cyclic shear testing, and displacement, torque, temperature, pressure and hole pressure data is recorded; and air content in air-contained soil is calculated. The air-contained soil pile soil testing device has the function of a conventional pile-soil interface shear instrument, precise preparation of a soil mass with quantitative air content is realizedthrough an air-contained soil generation system, and the interaction between the soil mass with different air content and the pile can be obtained; and automatic collection is realized in the acting process, and the data is accurate.

The invention discloses a circulating compression-shear soil frost heaving test system and test method. The test system comprises a temperature control test cabin, a horizontal loading motor, a vertical loading motor, a horizontal displacement sensor, a horizontal force sensor, a vertical displacement sensor, a vertical force sensor, a pore pressure acquisition instrument, a temperature controller, a Markov water replenishing bottle and a power supply. For a test soil unit, the temperature control test chamber adopts a temperature control metal plate to form a temperature control space around a test piece, so that the test is prevented from being influenced by the atmospheric environment on one hand, and on the other hand, a laminated ring with relatively small thickness can be conveniently adopted in the test, and the loading effect of the horizontal cyclic shear stress of the soil unit is improved. The vertical direction and the horizontal direction of the soil body frost heaving test system can be set to be static or dynamic loading, a soil body frost heaving test, a soil body melting test or a soil body freezing and thawing cycle test under temperature-complex stress path coupling can be carried out, and dynamic parameters such as dynamic shear modulus and damping ratio of frozen soil or positive temperature soil can be tested.

The invention discloses a long-life bearing lubricating grease, which comprises the following substances by weight: 45-50 parts of isocyanate; 9-11 parts of aniline; 25-27 parts of cyclohexylamine; 8-10 parts of a viscosity index improver; 2-5 parts of a detergent; 1-3 parts of an antirust agent; 1-3 parts of an oxidation and corrosion inhibitor; 0.5-2 parts of an efficient corrosion inhibitor; 1-3 parts of an extreme pressure antiwear agent; and 105-130 parts of high viscosity naphthenic oil. The preparation method of the long-life bearing lubricating grease comprises the steps of: (1) charging a saponification kettle with high viscosity naphthenic oil and performing heating; (2) adding isocyanate into an oil storage tank and performing stirring till thawing; (3) adding aniline, cyclohexylamine and isocyanate into the saponification kettle in proportion, performing heating, adding some diluent oil and conducting heating to 165DEG C, then transferring the product into a blending kettleand conducting cyclic shearing, and then adding additives; and (4) determining the oil quantity, and conducting homogenizing and degassing. The preparation method provided by the invention can substantially improve the service life of bearing lubricating grease, and the bearing lubricating grease can solve the problems of serious bearing wear and large noise, and achieve effective protection of bearings.

The invention provides a preparation method of an emulsion containing oleum fructus bruceae. The preparation method of the emulsion containing the oleum fructus bruceae comprises the following steps: firstly, performing circular emulsifying and shearing on a water-phase material and an oil-phase material to form a primary emulsion; and then, performing circular homogenizing on the primary emulsion to obtain a uniform emulsion which can be filtered by a sterilization filter. More specifically, the step of performing circular emulsifying and shearing means to perform circular shearing on the materials in an emulsifying and shearing tank and a pipeline shearing device. The emulsion containing the oleum fructus bruceae prepared by the preparation method has obviously reduced particle size, so that the emulsion can be filtered through a sterilization-grade filter so as to meet sterile test requirement; and moreover, the emulsion also has greatly improved stability.

The invention discloses a rock structural surface cyclic shearing device of an opposite-vertex clamping structure, wherein the device comprises an upper shearing box and a lower shearing box, and further comprises an upper positive shearing loading jack and an upper negative shearing loading jack which are symmetrically arranged on two sides of the upper shearing box; the device also comprises a lower positive shearing loading jack and a lower negative shearing loading jack which are symmetrically arranged on the two sides of the lower shearing box, and a normal force sensor is arranged at the telescopic end of the normal loading servo jack and abuts against the top of the upper shearing box. The invention further discloses a rock structural surface cyclic shear test method of the opposite-vertex clamping structure; the test sample can be kept in a fastened state from the beginning to the end in a cyclic experiment, a shear test piece is prevented from shaking in the shear box in cyclic shear, and the test precision is improved.

The invention discloses an experimental device and method for realizing rock shearing under mining-induced stress gradient, and the device is characterized in that a normal loading mechanism is arranged above a roller support, and consists of a normal gradient pressure constructor, a normal loading rod, a normal pressure sensor and a normal displacement sensor; the normal gradient pressure constructor comprises a supporting plate, a loading pressing block, a cover plate and a spring; a plurality of loading pressing blocks are arranged on the supporting plate, a plurality of vertical sliding grooves are formed in the cover plate, and a plurality of springs with different lengths are independently connected to the corresponding vertical sliding grooves and the loading pressing blocks; and the left shear loading mechanism and the right shear loading mechanism are oppositely arranged on the left side and the right side of the test space between the support and the normal gradient pressure constructor. The method comprises the following steps: assembling the experimental device; applying initial pressure; applying mining normal gradient pressure; applying mining lateral pressure; performing a one-way shear test; performing a cyclic shear test; and ending the experiment, and storing and sorting data. According to the device and the method, the shearing mechanical property of the rock in the mining-induced stress environment can be accurately obtained.

The invention discloses a simple cyclic shearing instrument of rock mass structure surfaces, comprising a fixed bottom plate, wherein a first side plate, a sliding plate and a second side plate are arranged on the fixed bottom plate, a lower shearing box is arranged on the sliding plate, an upper cutting plate is located above the lower shearing box, a telescopic end of a fixed jack and a blockingcolumn respectively abut against the two sides of the upper shearing box, the telescopic end of a first tangential jack and the telescopic end of a second tangential jack respectively respectively abut against the two sides of the lower shearing box, and the telescopic end of a normal jack abuts against the top of the upper shearing box. The invention further discloses a simple cyclic shearing test method of rock mass structure surfaces, and a shearing anisotropy test method of surrounding rock lining contact surfaces, and the invention can be applied to cyclic shearing tests of the rock massstructure surfaces; and researches on the shearing anisotropy characteristics of the rock mass structure surfaces can be carried out.

The invention relates to a special grease for worm and gear and a preparation method thereof. The grease is prepared by adding an extreme pressure anti-wear agent and antioxidant into high viscosity refined mineral oil as the base oil and a mixed soap as a thickening agent, and adding a special synthetic material. The production process of the special grease for worm and gear is as below: adding the base oil, an organic thickening agent, a tackifier B into a high-speed flow contactor by a predetermined weight proportion; conducting a saponification reaction at 100 DEG C-115 DEG C (simultaneous addition of part of the additive and reactants) for 1-2 hour; refining at the maximum temperature of 190-200 DEG C, and insulating for 60-90 min; transferring the reaction products to an intermediate tank for cyclic shear, and cooling to 120-150 DEG C; homogenizing; then cooling to 80-100 DEG C, adding an inorganic thickening agent, a tackifier A, the antioxidant, and the extreme pressure anti-wear agent; and then degassing, filtering and packaging. The special grease for worm and gear has the advantages of good adhesion, long service life, same life as equipment, good low temperature performance, high load carrying capacity, anti-friction properties and good pumpability.

The invention discloses an experimental device and an experimental method for measuring cyclic shear seepage of a rock mass at high temperature and high pressure. The seepage characteristic of the rock mass in the cyclic shear process at high temperature and high pressure is tested. The test sample is formed by combining two semi-cylinders, a rock and a rock thin plate; a base is fixedly connectedwith a confining pressure cylinder, the sample is placed in the support, and then the rock thin plate is fixedly connected with the axial pressure head through a fixing rod; the sample, the bracket and the axial pressure head are put into an inner cavity of a confining pressure cylinder, and a pressure transmission medium is placed around the sample and the bracket; the confining pressure head compresses the pressure transmission medium to provide specified confining pressure for the sample, and a high-temperature environment is provided through the heating rod; the pore fluid flows out through a fracture surface in the middle of the sample; the seepage characteristic relation in the rock mass cyclic shearing process at high temperature and high pressure is obtained by measuring fluid parameters of the gas outlet pipe. The device is reasonable in structure, easy and convenient to operate and wide in applicability.