156 results about "Breaking strength" patented technology

The invention discloses a coal gangue-based reinforced cement composite material and a preparation method thereof, and relates to the technical field of building materials. The coal gangue-based reinforced cement composite material is prepared from a coal gangue-based reinforced admixture, calcium ion doped modified multi-walled carbon nanotubes, polypropylene fibers, P.O42.5 Portland cement, metakaolin, silica fume, a polycarboxylate superplasticizer and water, calcium ion doped modified multi-walled carbon nanotubes and a coal gangue based reinforced admixture are cooperatively added into a cement matrix, seamless filling from nanometer to micrometer is achieved, a tough interface transition area is formed, pressure is jointly borne by a compact matrix and a strong interface, the compressive strength and breaking strength of the material are remarkably enhanced, and meanwhile, the compressive strength and breaking strength of the material are greatly improved. Migration of moisture and ions is effectively blocked, and the anti-permeability performance of the material is improved.

The invention relates to the field of refractory castable, in particular to mullite-based modified high-strength refractory castable and a preparation process thereof. The refractory castable is used for solving the problems of low strength and poor wear resistance of the existing refractory castable. The niobium-zirconium alloy and the benzoxazine-PAMAM copolymer are added into the refractory castable, the benzoxazine-PAMAM copolymer wraps a matrix in a three-dimensional network structure, so that the cohesive force is improved, a carbon layer is formed among matrix particles after sintering to improve the overall compactness of the material, micropores in the matrix of the refractory castable can be filled with the niobium-zirconium alloy, the porosity is reduced, and the porosity of the refractory castable is improved. The refractory castable disclosed by the invention can be used for reducing stress concentration, remarkably improving normal-temperature compression resistance and breaking strength, maintaining long-term high-temperature strength and ensuring that the refractory castable can still be kept stable in severe environments such as high temperature, high pressure and corrosion, so that the service life is prolonged, and the production safety is improved.

The invention belongs to the technical field of light-weight high-strength aramid fibers, and particularly relates to a light-weight high-strength aramid fiber composite cord fabric and a production method thereof.According to the light-weight high-strength aramid fiber composite cord fabric and the production method thereof, by designing a yarn guide component with the proper roughness range and the twisting speed, friction of the yarn guide component to fibers is reduced, and strength loss is reduced; a certain twisting direction, twisting degree ratio and twisting tension of the A yarn and the B yarn are designed, so that the A yarn and the B yarn contribute the maximum strength at the same time. Therefore, on the premise that the specification of the cord fabric is not changed, the breaking strength of the aramid fiber composite cord fabric is improved.

The present disclosure provides a member for a display device comprising a stacked body formed by stacking an impact absorbing layer and a hard coating layer, wherein, when measuring a tensile stress of the stacked body, a stress at which the hard coating layer breaks is regarded as a hard coating layer breaking strength, and an elongation at which the hard coating layer breaks is regarded as a hard coating layer breaking elongation, the hard coating layer breaking strength is 7 MPa or more, and the hard coating layer breaking elongation is 4% or more and 36% or less.

The invention discloses a light moisture-proof high-strength aerogel composite gypsum material and a preparation method thereof, belongs to the technical field of composite gypsum preparation, and aims to solve the technical problem that the moisture-proof performance and the strength of a composite gypsum material in the prior art need to be further improved. According to the invention, hydrophobic aerogel particles, a composite binder and surface treatment reinforced fibers are introduced into a gypsum matrix and form a stable multiple synergistic effect in a system; the aerogel particles provide heat insulation and hydrophobic channels, the composite binder enhances bonding among crystals through a chemical network, and the reinforced fibers realize high-efficiency stress transfer and keep interface stability at high temperature, so that the prepared composite material has relatively high compression resistance and breaking strength, the softening coefficient is greatly improved, the heat conductivity coefficient is obviously reduced, and the composite material has good heat insulation and heat preservation effects. The combustion performance is obviously improved, and the mechanical property, the water resistance, the heat insulation property and the flame retardant property are comprehensively and uniformly improved.

The invention discloses an evaporator and power conversion equipment, and belongs to the technical field of radiators. The multiple supporting structures are connected between the first inner wall face and the second inner wall face, part of the supporting structures define a pressure relief area, the pressure relief area communicates with the evaporation cavity, and the strength of the pressure relief area is smaller than that of the area where the other supporting structures are located; the pressure relief part is arranged in the pressure relief area and is arranged close to one supporting structure which forms the pressure relief area in a surrounding mode. The geometric shape of the pressure relief area is suddenly changed at the pressure relief part through the pressure relief part, so that the edge of the part, located in the pressure relief area, of the pressure relief part generates stress concentration under the action of pressure, the yield limit or the breaking strength of a material is easily reached firstly, breakage occurs, and directional pressure relief is achieved. Due to the fact that the wall thicknesses of the shell in the corresponding pressure relief area and the non-pressure relief area are the same, the overall corrosion resistance and strength of the evaporator are improved, and the reliability of equipment is improved.

The invention belongs to the field of fiber materials, and provides a hollow acrylic fabric with thermal insulation performance and a preparation process thereof. The composite design of an acrylonitrile-based copolymer shell layer and an inner cavity silicon dioxide aerogel layer is adopted, a boric acid ester cross-linked network is formed through borax bath treatment to lock a three-dimensional crimp structure, and a hydrophobic modified silicon dioxide aerogel layer with the thickness of 50-200 nm is constructed in a fiber inner cavity; the mechanical-structural synergy that the single-fiber breaking strength is not lower than 3.5 cN / dtex under the condition that the hollowness degree is 30%-45% and the fiber dry-state crimp number is not smaller than 12 / 25 mm is achieved, the thermal resistance of the fabric reaches 0.065 m.K / W to 0.075 m.K / W, the air permeability is kept at 150 mm / s to 250 mm / s, and the fabric has the advantages of being good in air permeability, good in air permeability and the like. The contradiction between mechanical bearing and hollow structure design under the high-solid-content wet spinning fine denier condition, the contradiction between structural stability and fatigue durability of boric acid ester cross-linked three-dimensional curl after multiple times of water washing and the contradiction between low gram weight and high thermal resistance and the heat transfer mechanism of breathable comfort are solved, and the wide warm-keeping garment application value is achieved.

Provided is an austenitic heat-resistant steel having excellent creep rupture strength and excellent creep rupture ductility. The austenitic heat-resistant steel has a chemical composition comprising, in terms of mass%, 0.01-0.40% C, up to 3.00% Si, up to 3.00% Mn, up to 0.100% P, up to 0.100% S, 20.0-35.0% Cr, 20.0-48.0% Ni, 0.1-5.0% Mo, 0.01-1.50% Ti, 0.01-0.50% V, up to 0.030% N, up to 0.100% Al, 0.0001-0.0200% B, etc., and has an average austenite crystal grain size of 0.0-5.0 in terms of ASTM No. In the austenitic heat-resistant steel, the Ti, V, and Mo contents and a Ti amount, a V amount, and a Mo amount that are determined from an electrolytic extraction residue satisfy expression (i) and expression (ii).　(i): TiER+VER+MoER≤1.000 (ii): 1.00≤(Ti+V+Mo)-(TiER+VER+MoER)

The invention relates to the technical field of metallurgical coking, and provides a devitrification and CO erosion resistant zero-expansion silica brick and a preparation method thereof.The devitrification and CO erosion resistant zero-expansion silica brick is prepared from, by weight, 3-10 parts of nanoscale alpha-Al2O3, 15-35 parts of andalusite, 30-40 parts of high-purity fused mullite, 10-20 parts of superfine silica powder, 2-5 parts of silica sol binding agent and 3-5 parts of composite mineralizer. Through the synergistic effect of the design of the composite mineralizer and the stepped heat treatment process, the technical problems that the existing zero-expansion silica brick is easy to devitrify and crystallize fused quartz, poor in CO erosion resistance and lack of crystallization degree during long-term use at high temperature are solved; the thermal shock cycle index and the high-temperature breaking strength of the material can be improved, the formation of alpha-cristobalite crystallization peak is effectively inhibited, and the mass loss is reduced in a reducing atmosphere, so that the structural stability of the material is enhanced, and the service life of the material is prolonged.

The invention relates to a sealing element (10) for building waterproofing, comprising a stretchable adhesive layer (11), wherein a concrete contact layer (12) comprising polyurethanes or polyurethane copolymers is applied to the adhesive layer (11), wherein the concrete contact layer (12) is a temporarily stable layer and the breaking strength of the concrete contact layer (12) is reduced to at least 20%, preferably at least 10% and particularly preferably at least 5% after storage in an aqueous 0.1 M NaHCO3 solution for a period of seven days at 23 °C compared to the breaking strength of the concrete contact layer without storage.

A hollow fiber element for a separation membrane module, including a plurality of hollow fiber membranes, and a tube sheet which is formed of a cured product of an epoxy composition and fixes and adheres at least one of the ends of the hollow fiber membranes. The cured product has a breaking strength retention of 75% or higher as measured in the form of a 0.2 mm thick film, the breaking strength retention (%) is defined as B1 / B0×100, B1 is a breaking strength (MPa) measured at 23° C. after the film is immersed in ethanol at 130° C. for 120 hours; and B0 is a breaking strength (MPa) measured at 23° C. before immersion in ethanol.

The present application relates to polybutylene terephthalate (PBT) material toothbrush filament technical field, specifically relates to a kind of multifilament version anti-lodging PBT monofilament and preparation method thereof;The preparation method is realized with the basic concept of multifilament to realize the basic form of monofilament, in the drawing process, every three monofilaments are gathered into a multifilament, in the subsequent water cooling, oiling etc. Process path, with the mode of multifilament, drafting, winding forming are completed.In the condition that monofilament specification remains unchanged, corresponding design is carried out to production process, and the quality indexes such as breaking strength, breaking strength variation coefficient, breaking elongation, breaking elongation variation coefficient of monofilament are controlled.In the realization equipment efficiency is improved three times target, product quality is upgraded, and the anti-lodging performance of PBT monofilament is improved.

The present application relates to the technical field of steelmaking auxiliary materials, in particular to a method for improving the balling rate of molybdenum oxide composite briquetting, in which process, in order to control the material temperature and overcome the problem of reaction heat release in the material, raw dolomite or limestone particles which are not easy to react with water are used to replace the traditional inhibitor lime, and the chemical reaction heat production is effectively controlled; the briquetting process provided by the present application adjusts the conventional one-time stirring and mixing to twice stirring, dry ice is added for cooling during the stirring process, and each time after stirring, standing is carried out, and through the above measures, the problem of material heating caused by the heat generated by material stirring and chemical reaction and then causing the problem of cracked briquetting after briquetting can be effectively solved. The balling rate of the molybdenum oxide composite briquetting for steelmaking produced by the process reaches more than 90%, the breaking strength is greater than 600N, and the falling strength is more than 15 times / (0.5m).

The invention discloses blast furnace stemming and a preparation method thereof. The invention discloses a high-temperature-resistant wear-resistant coating which is characterized by comprising the following components in parts by weight: 380-420 parts of brown aluminum oxide, 70-90 parts of a carburant, 50-70 parts of Guangxi white mud, 110-150 parts of silicon carbide, 15-30 parts of asphalt powder, 5-30 parts of vanadium carbide or chromium carbide or a mixture of vanadium carbide and chromium carbide or pore-forming vanadium chromium carbide and 50-100 parts of liquid resin. The blast furnace stemming disclosed by the invention has relatively high high-temperature breaking strength, normal-temperature compression strength and normal-temperature breaking strength, and excellent slag and molten iron erosion resistance and molten iron scouring resistance.

The invention provides an ecological decorative plate and a preparation method thereof, and belongs to the technical field of novel wall materials. The ecological decorative plate comprises perlite particles, cement, inorganic silica gel, a powder curing agent, glutinous rice glue, a waterproof agent and fibers. The preparation method comprises the main technical means of cement-inorganic silica gel-glutinous rice glue composite bonding, fiber and double-layer zinc-aluminum-magnesium net multi-scale enhancement, waterproof agent and self-repairing microcapsule synergistic protection, powder curing agent and stepped curing process optimization, gradient structure design and silane coupling agent interface chemical bonding and the like. The technical problems that a traditional cement-based perlite plate is large in brittleness, prone to cracking, prone to stripping deformation caused by low structural enhancement efficiency, poor in waterproofness, long in maintenance period, difficult to give consideration to environmental protection and performance and the like are solved, and the effects of improving the breaking strength, reducing the water absorption rate, shortening the maintenance period, reducing the cost and the like are achieved. And meanwhile, the comprehensive technical effects of high strength, high toughness, durability and environmental protection are achieved.

The invention discloses a three-dimensional fabric unit which comprises a middle layer, an upper surface layer and a lower surface layer, and the upper surface layer and the lower surface layer are formed on the upper side and the lower side of the middle layer through weaving. The specification of a single bundle or a single thread f is 10dtex-300dtex, the specification of a single strand or the f number is 1-90, the specification of a single bundle or the f number breaking strength is less than or equal to 7cN / dtex, the surface yarns of the upper surface layer and the lower surface layer are single bundles or single threads f number, and the specification of the surface yarns is 20dtex-300dtex; wherein the surface yarn is a single bundle or the f number is 1f-600f; the thickness of a single bundle of veil or the f number is 0.03 dtex-300 dtex; and the single-bundle or f-number breaking strength of the yarn is less than or equal to 5cN / dtex.

The invention provides preparation and application of river stone and tailing ore composite concrete. The preparation method comprises the following steps: (1) respectively washing river stone and tailing ore with water, drying and removing impurities; (2) 100 parts of cement, 20 to 30 parts of an admixture, 180 to 220 parts of river stone, 80 to 120 parts of tailings, 1.5 to 2.5 parts of an additive and 35 to 45 parts of water; the admixture is formed by mixing fly ash and slag powder according to the mass ratio of 1: 1; the additive is a polycarboxylic acid type high-efficiency water reducing agent; (3) firstly, the river stones and the tailings are subjected to dry mixing for 2-3 min, then the cement and the admixture are added and subjected to dry mixing for 3-4 min, then 60%-70% of water is added and stirred for 4-5 min, finally, the admixture and the remaining water are added, and high-speed stirring is conducted for 5-6 min; and (4) pouring and vibrating the stirred concrete mixture, and performing standard curing for 28 days to obtain a composite concrete finished product. Through reasonable grading of the river stones and the tailings, the void ratio of the composite aggregate is effectively reduced, so that the compactness of the concrete is remarkably improved, and the compressive strength and the breaking strength of the finished concrete are effectively improved.

A test sample is provided for measuring tensile strength of an adhesive bond between two identical substrates. Each identical substrate has first and second identical ends. An end from one substrate is aligned with an end from the other substrate so that they completely overlap and abut each other. Adhesive is applied to the abutting ends. An alignment fixture aligns the substrates while the adhesive cures. Each substrate includes through holes for mounting to a test machine without the use of special grips. After a test sample has been tested to failure, a new test sample can be quickly made by reversing the orientation of the substrates by 180 degrees and using their opposite ends to make a new test sample. After both ends of a substrate have been used for testing, both ends can be cleaned and the substrates reused for new test samples.

The invention discloses aluminum-based metal glass and a treatment method thereof. The treatment method comprises the following steps: obtaining a target aluminum-based amorphous alloy bar; determining an elastic loading force according to the breaking strength of the target aluminum-based amorphous alloy bar; according to the elastic loading force, axial elastic loading treatment is conducted on the target aluminum-based amorphous alloy bar, external energy is introduced into the aluminum-based amorphous alloy bar through the axial elastic loading treatment, the energy state of the aluminum-based metal glass is improved, and therefore the young aluminum-based metal glass can be obtained. In the process, more free volume / flow units are introduced into the metallic glass, so that the metallic glass is converted to a state close to a supercooled liquid structure, and a large number of shear bands are generated in the deformation process, so that the mechanical property of the aluminum-based metallic glass is remarkably improved, the brittleness of the aluminum-based metallic glass is improved, and the comprehensive mechanical property of the aluminum-based metallic glass is improved. And the method is easy to operate, a high-performance solution is provided for the lightweight fields of ships, aerospace and the like, and unification of excellent performance and industrial application is achieved.

The invention provides composite mortar, a preparation method of the composite mortar and a backing plate, and relates to the field of building materials. The composite mortar is prepared from 250 to 500 parts by weight of polymer emulsion, 400 to 700 parts by weight of quartz powder, 382 to 387 parts by weight of heavy calcium powder, 10 to 15 parts by weight of gypsum powder, 1 to 2 parts by weight of a water reducing agent, 0.5 to 2 parts by weight of polyvinyl alcohol and 1 to 2 parts by weight of bentonite. The quartz powder, the ground calcium carbonate powder and the gypsum powder with specific contents in the composite mortar are matched with the polymer emulsion, the polyvinyl alcohol, the water reducing agent and the bentonite, so that the production cost can be controlled at a lower level while rapid hardening, high bonding strength, high breaking strength, smooth construction and multiple protection functions are realized, and the composite mortar does not contain toxic and harmful components and is environment-friendly. The environment-friendly requirement is met.

The invention discloses a process for preparing 95 aluminum oxide ceramic by using dry pressing and granulation powder tailings. The process comprises the following steps: S1, preparing raw materials; s2, performing pretreatment; s3, adding auxiliary materials; s4, mixing and homogenizing treatment; s5, adjusting and refining treatment; s6, granulating and forming; s7, sintering treatment is carried out; and S8, carrying out post-treatment and detection. According to the method, the tailings generated in the processing process are recycled as raw materials, so that resource waste caused by direct discarding of the tailings is avoided, and cyclic utilization of the materials is realized. The tailings are subjected to pretreatment such as sedimentation, ball milling, sieving and iron removal, and a proper amount of aluminum oxide micro powder is added, so that raw material components are uniform and pure; the dry pressing molding and sintering process are combined to ensure the densification of the green body, so that the prepared 95 aluminum oxide ceramic is superior to the traditional prior art in the aspects of voltage resistance, breaking strength, hardness and appearance quality, and the problems of low voltage resistance, surface stripes and the like of the traditional tailing recycled ceramic are avoided.

The invention provides a method for enhancing plasticity of Zr-based amorphous alloy through high-pressure annealing and the Zr-based amorphous alloy. The Zr-based amorphous alloy is treated through high-pressure annealing (the pressure is 4-6 GPa, and the temperature is 575-635 K), on the basis of not changing the components and the size of the Zr-based amorphous alloy, the microstructure of the amorphous alloy is optimized through a simple and efficient high-pressure and near-glass transition temperature zone annealing treatment method, the plasticity and the breaking strength of the Zr-based amorphous alloy are remarkably improved, and the Zr-based amorphous alloy has the advantages of being good in mechanical property, good in mechanical property and good in mechanical property. And wide application of the amorphous alloy in the industry is promoted, and the method is suitable for industrial production and popularization.

The application provides a forming process for directly spinning fibers of 6000D or more, and belongs to the technical field of high-performance fibers. Polyester chips are used as raw materials, the polyester chips are added into a screw extruder for melt spinning, a plurality of spinnerets corresponding to the screw extruder respectively extrude protofilaments, the protofilaments enter a drafting and heat setting process and winding to obtain fiber products of 6000D or more. The application can realize direct forming of fibers of 6000D or more, such as 6000D, 7000D, 8000D and 9000D, without doubling, and has the advantages of short process route, short cycle, low energy consumption, low cost, high breaking strength and the like.

To provide a fluororesin piezoelectric film which is obtained from a fluororesin having low melt viscosity and has high breaking strength.SOLUTION: Wherein the fluororesin piezoelectric film has a retardation of 50nm or more and 3000nm or less, an internal haze of less than 1.2%, a breaking strength of 310MPa or more and 550MPa or less, and a piezoelectric coefficient d33 of 5. 0pC / N or more and 40. 0pC / N or less.SELECTED DRAWING: None

The invention discloses an all-solid-waste alkali-activated cementing material concrete formula and a production process, and belongs to the technical field of solid waste resource utilization, a self-synthesized modified binder is added in the preparation process to fill gaps among solid waste particles, the interface bonding force among all materials is enhanced, and the strength of the materials is improved. The modified binder contains a calcium-based diatomite component, chloride ions are adsorbed by utilizing a porous structure and ion exchange capacity of the calcium-based diatomite, corrosion of steel bars is reduced, then potential activity of solid waste is excited through an alkaline excitation effect of the composite alkali activator, a stable gel structure is formed, and compression resistance and breaking strength of the concrete are improved; the unique layered structure of the calcium-based diatomite can be embedded into a swelling network when the modified binder swells, so that the gaps can be filled with the layered diatomite, and calcium ions on the surface of the calcium-based diatomite can be used as a cross-linking agent when the modified binder is polymerized, so that the cross-linking strength of the modified binder is improved.

The invention relates to the technical field of aluminum oxide corundum brick production, in particular to an aluminum oxide corundum brick for an ultrahigh-temperature tunnel kiln crown and a preparation method of the aluminum oxide corundum brick. The alumina corundum brick for the superhigh-temperature tunnel kiln crown comprises the following chemical components in percentage by mass: 97.5-98.2% of Al2O3; 0.1% to 0.3% of Nb2O5; 0.2 to 0.42 percent of K2O; 0.3%-0.7% of Li2O (lithium oxide); and the balance of unavoidable impurities. According to the alumina corundum brick prepared by the invention, the bulk density is increased by 8.5% or more, the compression strength is increased by 20% or more, the high-temperature breaking strength is increased by 80% or more, the creep deformation is reduced by 40%, and the softening starting temperature under load is increased by 100 DEG C.

The invention discloses an ultrathin UHPC (Ultra High Performance Concrete) planting frame and a preparation method thereof. The ultrathin UHPC planting frame comprises a bearing frame and an edge frame, the edge frames are arranged on the two sides of the bearing frame, the bearing frame comprises a bottom contact plate, an inclined supporting plate and a top contact plate, the bottom contact plate, the inclined supporting plate and the top contact plate are sequentially arranged between the edge frames to form a wave groove structure, and water permeable holes can be formed in the bottom contact plate; according to the scheme, through a fiber synergistic reinforcement and shrinkage compensation system, the breaking strength of the planting frame is larger than or equal to 30 MPa, the compressive strength is larger than or equal to 125 MPa, the fracture rate is reduced to 0, the shrinkage rate is smaller than or equal to 0.02%, and the core problems of brittle fracture and shrinkage cracking of an ultrathin wall body are solved; and after 10 times of cold and heat cycles (-20 DEG C to 60 DEG C), no crack or fracture is generated, the number of freeze-thaw cycles is larger than or equal to 300, and the performance of the planting frame is far better than that of an existing planting frame.

The present application relates to a kind of composite flame-retardant fabric applied to metal melting splash protection and preparation method thereof, belong to special protection material technical field, including base cloth layer, metal functional layer, adhesive layer, the base cloth layer is connected with metal functional layer by adhesive layer, the base cloth layer is by base cloth yarn weaving composition.The present application, such as the composite flame-retardant fabric applied to metal melting splash protection is combined by the combination of base cloth layer, aluminium foil layer and flame-retardant adhesive layer, in combination with calendering-ladder curing process, solves the technical bottleneck of molten metal adhesion, high temperature instability and interface delamination, product realizes fabric gram weight:330-480gsm;Thickness:0.5-2mm;Breaking strength≥1500N;Tear strength≥100N;Anti-aluminum water splash grade: D3;Anti-iron water splash grade: E3;Heat protection performance TPP≥20cal / cm2;260 ℃ hot dimensional stability≤3%;Peeling strength≥30N / 5cm;Resist static water pressure≥100kPa technical index.

The application provides a mooring cable damage evaluation method based on internal friction driving damage expansion, which comprises the following steps: 1) obtaining the basic mechanical properties and geometric parameters of the polyester cable; 2) performing conversion on the polyester cable sub-cable, strand and yarn performance, and calculating the breaking strength, elongation and stiffness curve of the components; 3) discretizing the yarn in the strand into several layers of axis coincident cylindrical shells, and calculating the extrusion force and fiber tension in the adjacent fibers and adjacent cylindrical shells in the cylindrical shells; 4) calculating the tension of each layer of yarn to determine the friction form of the yarn and the friction force between different layers of yarn; 5) calculating the area damage of each layer of cylindrical shell after a single cycle or several cycles of combined calculation according to the friction force between different layers of yarn; 6) calculating the influence of micro-damage on the performance of the yarn and cyclically executing steps 4) to 6) until damage. The application can reveal the damage expansion law and realize the method of component-level real-time evaluation, and provides support for the safety of deep-sea mooring systems.

The method for evaluating the fracture mechanics performance of the water-soaked brittle solid material of the present application comprises the following steps: 1. A group of cuboid brittle solid material samples are prepared, and the samples are immersed in water. After the immersion is completed, the samples with different immersion times are selected for weighing, and then the samples with different water contents are selected; 2. The samples with different water contents in step 1 are selected, and the relationship curve between the uniaxial compression stress and strain of the brittle solid material samples and the initial density of the micro-defects of the samples under different water contents are measured; 3. The samples with different water contents in step 1 are selected, and the sliding friction coefficients of the brittle solid material samples with different water contents are determined; 4. The brittle solid samples containing cracks are prepared, and the fracture toughness of the brittle solid material with different water contents is measured; and 5. Based on the above steps, the fracture strength of the brittle solid material samples under the action of different water contents after being soaked in water is determined.