64 results about "Strain stiffening" patented technology

The invention discloses a numerical simulation analysis method for a near-river ultra-deep foundation pit under the action of seepage flow, and the method comprises the following steps: S1, constructing a three-dimensional numerical model based on finite element software PLAXIS 3D, and constructing a non-uniform stratum model in combination with a Borehole module; s2, fine modeling is conducted through the underground diaphragm wall, the reinforced concrete supports and the latticed columns; s3, simulating a small strain hardening characteristic and a rigidity attenuation effect of the soil body by adopting an HSS model; s4, simulating underground water flow by combining plastic steady-state seepage analysis, and simplifying the three-axis cement mixing pile into an underground diaphragm wall structure through an equivalent stiffness principle; and S5, step-by-step excavation and support sequential control construction procedures are adopted, and finally, the reliability of the model is verified by comparing a horizontal displacement simulation result of the diaphragm wall with field monitoring data. According to the method, the foundation pit deformation rule is predicted through HSS constitutive model and seepage coupling analysis, and the foundation pit deformation prediction precision is remarkably improved.

The invention provides a material constitutive parameter inversion method which can be applied to the technical field of artificial intelligence. The material constitutive parameter inversion method comprises the following steps: acquiring an elastic modulus and an actually measured load depth curve of a to-be-tested material in a single nanoindentation test; performing extrapolation translation preprocessing on the actually measured load depth curve to obtain an equivalent ideal curve; carrying out characterization processing on the equivalent ideal curve to extract input characteristic parameters which comprise press-in rigidity, unloading rigidity and plastic work proportion; the indentation rigidity, the unloading rigidity, the plastic work ratio and the elastic modulus are input into a pre-trained indentation constitutive mapping model to predict the yield strength and the strain hardening index of the to-be-tested material, and the indentation constitutive mapping model is a full-connection back-propagation neural network pre-trained through a finite element virtual test sample. The invention further provides a material constitutive parameter inversion system and device, a storage medium and a program product.

The invention relates to an electric arc additive mixed end plate connecting device and a performance prediction method, and the method comprises the steps: manufacturing a WAAM end plate at the end part of a conventional steel pipe through multi-axis metal 3D printing, and forming a mixed connecting piece; the two mixed connecting pieces are in butt joint through high-strength bolts to form the mixed end plate connecting device; geometric characteristic parameters of the mixed end plate connecting device are obtained by adopting a three-dimensional scanning technology, and the mechanical response of the mixed end plate connecting device is measured by combining a four-point bending test with a digital image correlation technology; and on the basis of the geometrical characteristic parameters and the mechanical response data, the yield bearing capacity is predicted through a correction yield line analysis method, and the ultimate bearing capacity is predicted by adopting an equivalent beam model considering the strain hardening effect. The device and the method have the beneficial effects that geometric characteristic measurement, interface connection characteristic and yield performance test, bearing prediction evaluation and application design of the mixed end plate connecting device combining the electric arc additive manufacturing stainless steel, low-carbon steel and high-strength steel end plates with the conventional steel pipe can be effectively realized.

The invention discloses a high-performance dielectric elastomer film, a driver capable of being driven at low voltage and a preparation method of the driver. According to the preparation method of the high-performance dielectric elastomer film, customization and balance of mechanical properties and electrical properties of a dielectric elastomer are realized by regulating and controlling the proportion of a chemical cross-linking agent, a high-polarity physical cross-linking agent and a monomer; according to the preparation method of the driver capable of being driven at the low voltage, a dielectric elastomer film and a flexible electrode are stacked through an optimized dry stacking method, the dielectric elastomer driver of a multilayer structure is constructed, and the driver has excellent performance under the low driving voltage. The preparation method has the potential of large-batch and large-scale production, and the prepared dielectric elastomer film has low Young modulus and enhanced strain hardening effect, can avoid electromechanical coupling instability, has high dielectric constant, has large-area strain in a low electric field, and can be used for preparing a dielectric elastomer film. The resulting dielectric elastomer driver can have a blocking force of 0.8 N and an energy density of 80 J / kg at a voltage of 500 V.

The invention belongs to the field of automobile steel manufacturing, and particularly relates to 400 MPa-grade high-strength cold-rolled automobile inner and outer plate steel based on an ultra-fast heating and continuous annealing technology and a preparation method of the 400 MPa-grade high-strength cold-rolled automobile inner and outer plate steel. The steel comprises the following chemical components in percentage by mass: 0.003%-0.008% of C, 0.3%-0.7% of Mn, 0.01%-0.08% of Si, 0.02%-0.06% of Ti, less than or equal to 0.03% of P, less than or equal to 0.002% of N, less than or equal to 0.005% of S and the balance of Fe and inevitable impurities. The yield strength of the steel plate is 240-320 MPa, the tensile strength is 400 MPa or more, the percentage elongation after fracture A80 is 36% or more, the plastic strain ratio r is 2.0 or more, and the strain hardening index n is 0.2 or more.

The present application relates to the technical field of ultra-high performance concrete, and particularly relates to a light sand modified ultra-high strain hardening ultra-high performance concrete. The light sand modified ultra-high strain hardening ultra-high performance concrete comprises the following raw materials in parts by mass: cementitious material 55-65 parts, fine aggregate 0-48 parts, light sand 0-5 parts, steel fiber 6-10 parts, and water 10 parts; the volume ratio of the fine aggregate to the light sand is 0-18:18-0, and the sum of the volume of the fine aggregate and the volume of the light sand is always the same. The present application improves the strain hardening grade of UHPC to more than 1.5 times, thereby obtaining an ultra-high strain hardening UHPC, which has a stronger crack width control ability compared with the traditional strain hardening type UHPC, and is particularly suitable for UHPC structure application in marine environment.

The application provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a protection plate. The battery monomer is contained in the box body, and the protection plate is connected to the box body. The protection plate comprises a first fiber resin layer and a reinforcing plate. The first fiber resin layer is arranged on at least one side of the reinforcing plate along the thickness direction. The elongation after fracture e1 of the reinforcing plate is greater than or equal to 28%, and the strain hardening index N of the reinforcing plate is greater than or equal to 0.27. The battery device provided by the application is beneficial to reducing the risk of deformation of the protection plate and the risk of fracture of the protection plate.

The invention relates to the field of bridge damping, in particular to a near-fault bridge anti-seismic toughness improving device and a test method thereof.The bridge comprises T-beams, a cover beam, a diaphragm plate between every two adjacent T-beams and an ECC column located between the two T-beams; two pairs of SMA disc spring devices are arranged on the ECC column body, one pair of SMA disc spring devices are arranged towards the T beam, and the other pair of SMA disc spring devices are arranged towards the transverse partition plate; the SMA disc spring devices are used for enabling the T beams to recover to the initial positions through the recovery characteristic of the SMA disc spring devices after relative displacement of the bridge in the transverse bridge direction occurs, and the ECC column is arranged between the two T beams of the bridge, so that the T beams can be recovered to the initial positions. The limit tensile strain of the ECC (fiber cement-based composite material) material can reach more than 200 times that of the traditional concrete, and the ECC material is accompanied by the multi-crack cracking phenomenon of fine cracks, so that the strain hardening characteristic of a similar metal material under the tensile effect is formed, and the structural deformation caused by earthquakes can be effectively dealt with.

The invention provides a quantitative evaluation method for micro-area comprehensive mechanical properties of an electron beam welding joint, and belongs to the technical field of material mechanical property evaluation.A load-displacement curve is obtained through a nanoindentation test, and a data processing method combining numerical integration and high-order derivative calculation is adopted, so that the comprehensive mechanical properties of the electron beam welding joint are evaluated. Meanwhile, three performance parameters of strength, plasticity and strain hardening are extracted, and a quantitative mapping relation between the three performance parameters and the microcell structure is established. The method solves the problem of mechanical property quantitative evaluation of gradient structures of a fusion zone, a heat affected zone and a base metal zone of a welding joint, and the problems of high cost, low efficiency, single parameter and the like in the existing evaluation technology.

The application discloses a kind of unbound post-tensioned prestressed fabricated column foot and post-earthquake rapid repair method, belong to building structure seismic and fabricated steel structure technical field.The column foot includes base plate, steel column, friction layer, strain hardening cement-based composite sleeve, vertical prestressed steel bar and cover plate;The friction layer uses block type structure, and is spliced by several friction layer monomers;Vertical prestressed steel bar is threaded through strain hardening cement-based composite sleeve and cover plate, and is fixed cover plate and applies prestress to vertical prestressed steel bar by disc spring group and anchor nut being set to its top end, realizes the unification of " high seismic, easy construction, fast repair ".The application also discloses the post-earthquake rapid repair method of the column foot, including post-earthquake evaluation, elastic self-resetting, installing temporary support, in-situ jacking, lateral replacement, resetting tensioning and the like steps, using unbound characteristics, without lifting off steel column can be completed in 3-4 hours friction layer replacement.

The present invention provides an ionomer having high strain-hardening properties and excellent moldability.　The ionomer contains: a structural unit (A) derived from at least one member selected from the group consisting of ethylene and an α-olefin having 3 to 20 carbon atoms; a structural unit (B) having at least one member selected from the group consisting of a carboxyl group and a dicarboxylic acid anhydride group; and a structural unit (C) having a carboxylic acid metal salt group. The ionomer has 50 or fewer methyl branches per 1,000 carbon atoms or has a total number of ethyl and butyl branches of less than 4.2 per 1,000 carbon atoms. When the maximum elongation viscosity after strain hardening is defined as ηmax(t1), a time t in question is defined as t1, and an approximate straight line of the elongation viscosity before stain hardening is defined as ηlin(t), ηmax(t1) and ηlin(t1) satisfy ηmax(t1)> ηlin(t1), and further satisfy formula (α) or (β).　Formula (α): ηmax(t1)>1.9 ηlin(t1)1.1 Formula (β): ηmax(t1)≥1.9 ηlin(t1)0.7

The application provides a tunnel surrounding rock grouting reinforcement process simulation analysis method and system, relates to the tunnel surrounding rock reinforcement simulation technical field, and effectively improves the spatial resolution of the surrounding rock deformation state monitoring through the arrangement of multiple evaluation interfaces in the tunnel axis direction and the multi-point synchronous strain collection; the volume strain hardening index normalization analysis can dynamically and quantitatively reflect the mechanical property evolution of the surrounding rock after being compressed; the volume strain of the surrounding rock is dynamically coupled with the rheological test parameters of the grouting material, the timeliness and accuracy of the slurry permeability and pressure correction are improved; the linear interpolation method is used to realize the continuous distribution calculation of the grouting pressure in the tunnel axial direction, and the simulation analysis is significantly improved in the refinement and practicability.

The application discloses a method for analyzing nonlinear dynamics and stress wave propagation characteristics of a dielectric elastomer actuator structure. The method considers the strain hardening effect and viscoelasticity of the dielectric elastomer material, establishes a dynamic model of the dielectric elastomer actuator structure from linear damping assumption and considering material viscoelasticity respectively, calculates the equilibrium deformation and inherent frequency of micro-vibration near the equilibrium state, studies the nonlinear dynamic response of the structure under alternating voltage load, explores the influence law of the constitutive parameters on the nonlinear dynamic response, and analyzes the internal relationship between material viscoelasticity and structure vibration damping. In addition, considering compressibility, the stress wave propagation characteristics in the finite deformation state are studied, the separation phenomenon of transverse wave and longitudinal wave is analyzed, and the influence of the constitutive parameters and strain hardening effect on the stress wave propagation characteristics is explored. The application can provide a theoretical basis for the fine design of the dielectric elastomer actuator and the control of stress wave propagation by adjusting the electric field.

This disclosure provides a polyether-ester elastomer with a high stain hardening ability, wherein the thermoplastic polyether-ester elastomer contains polyester hard segment, polyether soft segment and at least one inorganic compound. The inorganic compound is selected from the group consisting of silicon dioxide, titanium dioxide, zinc oxide, aluminum oxide, aluminum silicate, zirconium oxide, potassium titanate and derivatives thereof. This disclosure also provides a polyether-ester elastic fiber which is characterized by a stress-strain curve with a specific profile. This disclosure also provides a process for preparing the polyether-ester elastomer, a process for preparing the polyether-ester elastomer fiber, use of the polyether-ester elastomer or polyether-ester elastomer fiber, and a polyether-ester elastic material comprising the polyether-ester elastomer.

This invention discloses a fitting method for the Johnson-Cook constitutive model of PtW7Ir1 alloy ultrafine wire drawing, belonging to the field of numerical simulation technology for metal material processing. This invention extracts three coefficients from the JC constitutive model and obtains the true stress-strain by conducting room temperature quasi-static uniaxial tensile tests on standard PtW7Ir1 alloy specimens. Then, it solves for the yield strength A and elastic modulus of the PtW7Ir1 alloy. Using the Hollomon's rule and the JIA rule, it obtains the strain hardening modulus B and hardening exponent n. Based on the yield stress data obtained from the tensile test, it calculates the strain rate strengthening coefficient and thermal softening exponent using the least squares method to complete the fitting of the constitutive model. This invention obtains JC constitutive parameters applicable to this alloy and, by introducing the Hollomon's rule and the JIA rule, accurately predicts the true hardening behavior of the material after necking, enabling the constitutive model to more realistically reflect the mechanical response of the material under cumulative deformation in multiple drawing passes.

The application belongs to the technical field of stainless steel preparation, and discloses a cold-deformable and heat-treatable hardening Ni-free high-strength stainless steel and a preparation method thereof. The stainless steel comprises the following components in percentage by mass: Cr: 13-15%, C: 0.25-0.4%, Mn: 0.5-2%, Cu: 0.1-3%, Mo: 2-3%, Si: 0-0.5%, and the balance of Fe and inevitable impurities. The stainless steel does not contain Ni element, has a low work hardening rate (strain hardening index n≤0.185) and a fracture elongation rate of more than 20% in a soft state (annealed state), is cold-deformable, and has low raw material and processing costs; after quenching and aging heat treatment, the stainless steel not only has an optimal combination of strength and toughness (yield strength and tensile strength are more than 1300 MPa and 1600 MPa respectively, and elongation is greater than 10%), but also has a high yield strength ratio.

Disclosed is a polyamide block copolymer which comprises: a polymer block (A) that has a glass transition temperature of more than 20°C; and a polymer block (B) that has a glass transition temperature of 20°C or less. The polymer block (A) contains 50 mol% or more of a constitutional unit that is derived from a semiaromatic polyamide. The polyamide block copolymer has a complex shear viscosity η0 of 500-10,000 (Pa∙s) at an angular frequency of 6.28 rad∙s- 1 and a strain hardening parameter H of 1.5 or more.

An electromechanical actuator includes a planetary rolling screw drive having a plurality of planets, a driven cage guiding the plurality of planets, and a threaded spindle. The threaded spindle has a formed thread with a finish produced by martensite precipitation and strain hardening. The threaded spindle is formed from a steel including 0.4 to 1.5% by weight of Carbon, 12.0 to 22.0% by weight of Manganese, up to 4.0% by weight of Chromium, up to 0.5% by weight of Nickel, up to 0.3% by weight of Copper, up to 0.3% by weight of Vanadium, up to 0.3% by weight of Sulfur, up to 0.1% by weight of Phosphorus, up to 4.0% by weight of Silicon, up to 0.05% by weight of Aluminum, and a remainder of iron and smelting-induced impurities.

Provided is a steel sheet suitably used for an automobile structural member and the like, and more particularly, to a steel sheet having high strength and excellent formability that may prevent processing defects such as cracks or wrinkles occurring during the press-forming, and a method for producing the same.

This invention provides a bimodal medium-density polyethylene (MDPE) composition and a micro-irrigation drip tape comprising the MDPE composition. The MDPE composition can be extruded at high linear velocity while maintaining other desired properties. The MDPE composition comprises a high molecular weight (HMW) polyethylene component and a low molecular weight (LMW) polyethylene component. The MDPE composition has a molecular weight of 0.937 g / cm³. 3 Up to 0.946 g / cm 3 Density; high-load melt index (I21) of 7 g / 10 min to 20 g / 10 min; cross G' = G” of 30 kPa to 50 kPa; notched constant tensile load failure time greater than 700 hours at 30% yield stress as measured according to ASTM D5397; and strain hardening modulus greater than 65 MPa.

This invention discloses a method for producing dual-phase steel strip for automotive structures, comprising: (1) a smelting-continuous casting process, wherein the steel composition supplied to the casting machine by mass percentage is C: 0.05-0.40%, Si≤1.50%, Mn: 1.0-3.0%, P≤0.050%, S≤0.030%, Alt: ≤0.050%, Cr: 0.10-1.00%, Ca: 0.0005-0.0030%, with the remainder being Fe and impurities; (2) a hot rolling process; (3) a pickling and cold rolling process; and (4) a continuous hot-dip galvanizing and finishing process. The purpose of this invention is to provide a method for producing dual-phase steel strip for automotive structures. The dual-phase steel strip for automotive structures of this invention has the characteristics of high strength, high strain hardening index, good strength and ductility matching, and high corrosion resistance.

The application discloses a numerical simulation method of a viscoelastic nonlinear dielectric elastomer constitutive model, constructs a free energy function of a dielectric elastomer considering a strain hardening effect; obtains a super-elastic constitutive model of the dielectric elastomer according to the free energy function of the dielectric elastomer; based on the obtained super-elastic constitutive model, introduces viscoelasticity of the dielectric elastomer material, and constructs a visco-hyper-elastic constitutive model of the dielectric elastomer; based on the constructed visco-hyper-elastic constitutive model, finite element simulation is carried out on a driver or a sensor structure with the dielectric elastomer as the material to carry out numerical simulation, and electromechanical stability and dynamic response of the dielectric elastomer structure are obtained, thereby laying a theoretical foundation for structure design of the dielectric elastomer. The application provides a new method for accurately calculating critical instability voltage of a complex dielectric elastomer structure, and also provides a possibility for accurately simulating dynamic behaviors of the dielectric elastomer.

The invention belongs to the field of crustal stress measurement, and provides a crustal stress measurement method based on a nonlinear mechanical theory, which comprises the following steps: firstly, measuring a stress-strain curve of a strain hardening material to obtain mechanical parameters, and then constructing a measurement platform comprising a concrete cube, an elastic-plastic thick-wall cylinder and a precise range finder; the thick-wall cylinder is embedded into a concrete through hole and is internally provided with a precise range finder to monitor the change of the inner diameter. A compression test is carried out through multiple groups of horizontal pressure stresses, numerical simulation is combined, and a nonlinear model about the horizontal pressure and mechanical parameters and geometric parameters of the thick-wall cylinder is constructed by applying a Bayesian neural network and a data augmentation technology. The method comprises the following steps: placing a crustal stress observation instrument in an underground soft rock area or a fracture zone deep hole, continuously monitoring the change of the inner diameter of a thick-wall cylinder after coupling with concrete, and determining maximum and minimum principal stress and directions according to a nonlinear model; by means of the method, scientific and technical support can be provided for deep ground scientific exploration and underground engineering construction.

The application discloses a kind of high strain hardening ability titanium alloy and preparation method.The titanium alloy is by the following components according to mass percentage: Al 5.5~6.5%, V 3.5~4.5%, Mo 1.5~2.5%, Fe 0.4~0.6%, Cr 0.4~0.6%, remainder is Ti and inevitable impurities;Wherein the sum of mass of Fe and Cr is 0.8~1.2%, and the mass ratio of Mo / (Fe+Cr) is 1.7~3.2.By introducing slow diffusion element Mo, synergistic effect with Fe, Cr, combined with near β phase transition region hot rolling and rapid cooling, metastable β phase is obtained.The metastable β phase can simultaneously start stress-induced α' martensitic phase transition, realize multiple plastic deformation mechanism synergy.Tensile strength ≥1125MPa, yield strength ≥712MPa, elongation ≥15.1%, realize the excellent match of high strength, high plasticity and high strain hardening ability.

The application provides a high-toughness high-damping layered aluminum-based composite material and a preparation method thereof, and the layered aluminum-based composite material is obtained by vacuum hot-pressing sintering and rolling of the layered composite material after hot pressing, the heterogeneous metal interface (aluminum alloy / ferrite stainless steel) is formed, a large number of geometrically necessary dislocations are generated and accumulated near the interface during the deformation of the composite material, the interface damping source and the dislocation damping source of the material are increased, and the damping performance of the material is improved; the layered heterogeneous structure in the composite material can coordinate the deformation of the material, reduce the degree of strain localization, and improve the strain hardening capacity of the material through the heterogeneous deformation induced strengthening effect, so that the strength and toughness of the material are improved, and finally the material has high strength and toughness and high damping performance.

The application provides a material stress prediction method and a server. The prediction method comprises the following steps: a first correction model is established according to a strain hardening effect model and a thermal softening effect model. A strain rate strengthening term in a JC model is replaced by the first correction model to establish a corrected JC model. The JC model is a product of a strain hardening term, a strain rate strengthening term and a temperature softening term. The stress of the material is predicted according to the corrected JC model. According to the corrected JC model, the complex strain rate effect of the material under high strain rate can be accurately characterized, the prediction accuracy is improved, and a theoretical basis is provided for production and processing. For users, when the condition parameters are changed, the target of the metal sheet component to be prepared can also be obtained according to the corrected JC model, the trial-and-error method of the users to obtain the target of the metal sheet component to be prepared is reduced, the cost is saved, and the time is saved.

The invention relates to the field of polyvinyl acetal resin products, in particular to a polyvinyl acetal resin composition, a preparation method and a laminated glass intermediate film. The polyvinyl acetal resin composition is used for manufacturing a laminated glass intermediate film and comprises first polyvinyl acetal resin and second polyvinyl acetal resin, the number of carbon atoms in an acetal group of the first polyvinyl acetal resin is 1-4, the number of carbon atoms in an acetal group of the second polyvinyl acetal resin is 1-4, and the number of carbon atoms in an acetal group of the second polyvinyl acetal resin is 1-4. The number of carbon atoms in an acetal group of the second polyvinyl acetal resin is 5-8; the ratio of strain hardening fracture work of the polyvinyl acetal resin composition is 20%-40%. According to the polyvinyl acetal resin composition, the preparation method and the laminated glass intermediate film provided by the invention, the strain hardening fracture work ratio of the polyvinyl acetal resin composition is 20-40%, and the laminated glass intermediate film prepared from the polyvinyl acetal resin composition has more excellent tear strength and impact resistance than a common PVB intermediate film.

Provided are multimodal polyethylene compositions, and geomembranes including the same. The multimodal polyethylene compositions according to embodiments disclosed herein include a first polyethylene component and a second polyethylene component, wherein the composition has the following: a density of from 0.933 to 0.945 g / cm3; a high flow melt index (I21) of from 7.5 to 15.0 g / 10 min; a I21 / I5 of greater than 20.0; a strain hardening modulus of at least 45 MPa; and wherein the first polyethylene component has a density of less than 0.930 g / cm3. The multimodal polyethylene composition can be formed into geomembrane and can exhibit a desirable balance of processability, slow crack growth resistance, and other mechanical properties.

The invention discloses spherical end steel fiber reinforced zirconia nanoparticle ultra-high performance concrete and a preparation method thereof, the concrete comprises cement, silica fume, quartz powder, quartz sand, water, a superplasticizer, zirconia nanoparticles and spherical end steel fiber, the contact area between the steel fiber and a matrix is increased and a mechanical interlocking structure is formed through the spherical structure at the end of the steel fiber, the mechanical anchoring effect is remarkably enhanced, an efficient bridging system is formed in the matrix, and the fiber absorbs a large amount of energy through end anchoring and self deformation during crack expansion. Zirconium oxide nanoparticles are combined to strengthen a matrix and optimize fiber-matrix interface stress transfer, and the zirconium oxide nanoparticles and the matrix cooperate to promote the material to present a remarkable strain hardening behavior before damage, so that the toughness and the energy-dissipating capacity are greatly improved, and the tensile strength, the compressive strength, the bending property and the toughness are remarkably improved; the problems that interface bonding is weak, and microcracks are often induced by stress concentration at the ends of the fibers are solved.

The invention discloses low-heat low-shrinkage supersulfate cement-based hydraulic mortar as well as a preparation method and application thereof, and belongs to the field of hydraulic engineering materials. The mortar comprises the following components in parts by mass: 35-45 parts of granulated blast furnace slag, 5-15 parts of a sulfate activator, 2-8 parts of silica fume, 2-8 parts of an alkaline activator, 45-55 parts of fine aggregate, 0.1-1 part of a water reducing agent and 0.1-1 part of organic fibers, the water-binder ratio is 0.3 to 0.5. The material can effectively reduce internal early-stage hydration heat release and reduce cracking phenomena caused by overlarge internal and external temperature difference under the condition of meeting enough toughness requirements, has excellent anti-cracking performance and strain hardening characteristics, is particularly suitable for being used as a raw material to be applied to preparation of concrete face rockfill dams, and can be used for preparing concrete face rockfill dams. And the problem of serious leakage caused by cracks is effectively prevented.