306 results about "High stress" patented technology

A component (202) is disclosed that includes a body (206) and an additive manufactured (AM) metal mass (200) that includes a first section (292) and a stress relief section (294). The stress relief section (294) includes a porous region (300) having a porosity in which an open spatial volume accounts for 2% to 50% of the total volume of the stress relief section (294). The stress relief section (294) has a smaller at least one of thermal conductivity, tensile strength, ductility, and fatigue strength than the first section (292). A braze material (310) couples the AM metal specimen block (200) to a specimen block opening (204) in the body (206). The stress relief section (294) creates a low stress zone in the metal specimen block (200), which can be located near or adjacent to a high stress zone. The stress relief section (294) reduces residual stress in the metal sample block (200), which reduces related challenges to couple the metal sample block (200) to the body (206) of the component (202), particularly in the case of the use of superalloy materials.

A component including a body, and an additively manufactured (AM) metal coupon including a first section and a stress-relief section, is disclosed. The stress-relief section includes a porous region having a porosity between 2% to 50% open space volume to total volume of the stress-relief section. The stress-relief section has at least one of thermal conductivity, tensile strength, ductility, or fatigue strength less than first section. A braze material couples the AM metal coupon to a coupon opening in the body. The stress-relief section creates a low-stress zone in the metal coupon that can be located near or adjacent to a high-stress zone. The stress-relief section reduces residual stress in the metal coupon, which reduces the related challenges of coupling the metal coupon to the body of the component, especially where superalloy materials are used.

The invention relates to a 3D printing method and system for a composite prestressed reinforcing rib, and solves the main problems of weak interlayer adhesive force, large thermal stress and lack of an effective reinforcing rib adding method in the mechanical property of an existing 3D printing technology. Printing parameters and prestress release are cooperatively controlled on the basis of characteristic parameters of printing materials through a stress linkage algorithm, vertical ribs are tensioned for the second time through an interlayer compensation algorithm every time a preset number of layers are printed, and the printing parameters are dynamically adjusted through a path optimization algorithm in a high-stress area; when printing is completed and the material is not completely cured, stress distribution of all the reinforcing ribs is scanned through a stress balance algorithm and adjusted to a preset deviation range, and it is ensured that stress distribution of the whole structure is uniform; and after the printing material and the reinforcing ribs are compounded and cured, corresponding curing is performed according to the characteristics of the printing material. The 3D printing structure has the following effects that the mechanical property and reliability of the 3D printing structure are improved, and the interlayer strength and the overall stress distribution are optimized.

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention relates to the technical field of coal mine safety mining, and discloses a coal mine roadway high-stress area unloading-to-suction danger relieving method which comprises the following steps: step 1, a pressure relief stage: drilling holes in a roadway high-stress area to form a pressure relief channel; 2, a transfer stage, wherein stress is transferred to the deep part of the coal rock mass through the layout of the drill holes; and (3) an energy absorption stage: an energy absorption device is installed in the drill hole, the device comprises an outer steel pipe, an internal high polymer material and a monitoring element, the diameter of the drill hole in the step (1) is 50-150mm, the depth of the drill hole is 5-20m, a one-time hole forming process is adopted for construction, and the drill hole is formed in a high stress concentration area which is 6-20m away from the surface of the roadway and is arranged at intervals in the axial direction of the roadway. By constructing a pressure relief-transfer-energy absorption three-stage synergistic effect system, the whole-process dynamic regulation and control of the surrounding rock stress of the roadway is realized, and the problem that the pressure relief effect is uncontrollable due to the fact that a stress transfer path is not clear in the prior art is effectively solved.

The invention provides a friction welding method and a connection structure. A conical bonding pad connects a far-end component and a near-end component with a conical hole for accommodating the conical bonding pad; the method comprises the following steps: clamping the clamping end; during primary forging, the clamping device is controlled to drive the conical bonding pad to rotate for the primary forging time length at the primary forging rotating speed, the pressure jacking device jacks the contact end towards the direction of the far-end component at the primary forging pressure, and the bonding pad rubs against the far-end component; the initial forging rotating speed is 5%-45% of the theoretical range, the initial forging pressure is 55%-95% of the theoretical range, and the initial forging duration is 5%-45% of the theoretical range; during finish forging, the rotating speed of the clamping device is controlled to be zero, the pressure jacking device jacks the conical bonding pad towards a far-end component for finish forging duration and extrudes melt under finish forging pressure, the finish forging pressure is larger than the initial forging pressure, the welding power is reduced in a low-speed short-time and certain-high-pressure mode, the welding equipment is made to meet the requirements for miniaturization and light weight, field operation can be conducted, and the welding efficiency is improved. The melt is extruded from the side face of the conical bonding pad, impurity discharge is promoted, and the welding quality is improved.

In a foldable display device, stretchability is given to an outermost area of the folding area of the first support substrate to which a relatively high stress is applied. Thus, the folding radius at the outermost area increases, which relatively reduces the stress at the outermost area. Accordingly, it is possible to suppress occurrence of cracks in the outermost area.

The invention discloses a manufacturing method for preventing a single-board guitar panel from recessing, and relates to the technical field of manufacturing for preventing the single-board guitar panel from recessing, and the method comprises the steps: carrying out the finite element stress simulation of a three-dimensional digital model of the single-board guitar panel, and determining a high-stress region in a stress state; according to the distribution characteristics of the high-stress area, generating a structure model of the bionic support network through topological optimization; preparing a lightweight support net with a bionic structure by adopting an additive manufacturing process based on the structure model; the method comprises the following steps: placing a to-be-processed veneer panel on a rigid mold with a preset curved surface, and carrying out plastic pre-deformation on the to-be-processed veneer panel under the action of vacuum negative pressure to obtain a pre-formed panel; a lightweight supporting net is fixed to a high-stress area on the inner side of the preformed panel; the modularized metal framework with preloaded stress is installed at a preset position in the guitar body to form a reverse acting force system which resists the downward sinking of the panel; and carrying out integral curing treatment on the guitar body provided with the supporting net and the metal framework to complete integrated manufacturing.

The application provides a chemically strengthened microcrystalline glass, a cover plate glass, an electronic device and a glass device, and belongs to the technical field of microcrystalline glass. The application makes the surface composition and stress structure of the chemically strengthened microcrystalline glass with lithium disilicate as the main crystal phase meet specific requirements, so that the chemically strengthened microcrystalline glass can meet high stress levels and also ensure good weather resistance, and can better ensure that the chemically strengthened microcrystalline glass meets application requirements.

The invention discloses an MEMS device and a preparation method thereof, and relates to the technical field of semiconductor devices. The MEMS device comprises a substrate layer, a stress matching layer and a doped polycrystalline silicon structure layer which are sequentially stacked from bottom to top, and the preparation method comprises the following steps: forming a sacrificial layer on the substrate layer, patterning the sacrificial layer, and defining anchor regions of the stress matching layer and the doped polycrystalline silicon structure layer; depositing a stress matching layer on the patterned sacrificial layer, wherein the stress matching layer is a silicon nitride-based composite film with stress increased from bottom to top in a gradient manner; depositing a doped polycrystalline silicon structure layer on the stress matching layer; and sequentially carrying out patterning treatment and anchor region annealing treatment on the doped polycrystalline silicon structure layer, and carrying out removal treatment and drying treatment on the sacrificial layer to prepare the MEMS device. The MEMS device prepared by the invention has the characteristics of high stress matching, uniform doping concentration and relatively good process compatibility.

This application belongs to the field of glass-ceramics technology, specifically relating to a glass-ceramic, a chemically strengthened glass-ceramic, and their applications. The glass-ceramic comprises a primary lithium disilicate crystalline phase and contains various oxides within specific ranges, with the composition, expressed as a molar percentage of each oxide in the glass-ceramic composition, satisfying the following: 2.00 ≤ SiO₂ / Li₂O ≤ 2.40. The glass-ceramic of this application exhibits high intrinsic strength and excellent optical properties, and can be chemically strengthened to produce a chemically strengthened glass-ceramic with high stress levels and excellent deformation resistance.

The invention discloses a tensile test device and method based on a pressing-to-pulling mode, and relates to the technical field of tensile tests. A tensile test method of a test piece under high temperature and high stress is realized, and the problems of stress concentration, difficulty in test piece preparation and the like in the existing tensile test are solved. The device comprises an axial loading mechanism, a confining pressure heating mechanism, a data acquisition mechanism and a control module, and the axial loading mechanism is connected with two ends of a test piece and is used for applying an axial load to the test piece; the confining pressure heating mechanism surrounds the periphery of the test piece and is used for applying circumferential pressure to the test piece and heating the test piece; the data acquisition mechanism is used for acquiring tension, temperature and deformation of the test piece under load; the signal output end of the control module is connected with the signal input ends of the axial loading mechanism and the confining pressure heating mechanism, and the control module is used for controlling starting and stopping of the axial loading mechanism and the confining pressure heating mechanism; the signal input end of the control module is connected with the signal output end of the data acquisition mechanism and used for receiving data acquired by the data acquisition mechanism.

The invention discloses a device and method for testing durability of a concrete structure in a deep complex environment, and the method is characterized in that a self-anchoring loading device enables two concrete members and a high-strength round bar to be pressed and fixed through bolts, so that the two concrete members are in a high-stress loading environment; the pressure sensor is used for measuring stress applied to the concrete member by the bolt; the self-anchoring loading device is placed in a high-strength pressure tank containing a corrosive solution, and the stray current recorder is used for enabling the two concrete members to be in a stray current environment; the air compressor is communicated with the high-strength pressure tank and is used for pressurizing the corrosive solution, so that the two concrete members are in a high-water-pressure environment; on the premise that erosion durability tests can be carried out on a plurality of samples at the same time, the environment where a deep concrete structure is located can be simulated through the coupling effect of high stress, stray current and high water pressure, and therefore the durability of the concrete structure in the deep complex environment can be accurately obtained.

The present application relates to the technical field of glass ceramics, and in particular, to a glass ceramic, a chemically strengthened glass ceramic, and uses thereof. The glass ceramic comprises lithium disilicate as a main crystal phase and has specific content ranges of oxides. On the basis of the content expressed as the molar percentage of each oxide in the composition of the glass ceramic, the composition of the glass ceramic satisfies 2.00≤SiO2 / Li2O≤2.40. The glass ceramic of the present application has high intrinsic strength and excellent optical performance, and can be chemically strengthened to obtain a chemically strengthened glass ceramic with high stress level and excellent deformation resistance.

The invention provides a cement-based composite grouting material and method for reinforcing deep broken surrounding rock, and belongs to the technical field of grouting materials. The high-performance cement-based composite material is prepared from the following components in parts by weight: 100 to 200 parts of a Portland cement matrix, 20 to 70 parts of a multi-element active mineral admixture, 5 to 30 parts of hollow glass beads, 0.2 to 4.0 parts of aluminum oxide powder, 0.1 to 0.4 part of powdery graphene oxide, 0.5 to 3.0 parts of a polycarboxylate superplasticizer and 60 to 100 parts of water. The problems that in deep broken surrounding rock reinforcement, a traditional cement-based grouting material is difficult to consider bearing capacity and dynamic disturbance resistance at the same time, performance is degraded at the high temperature, and all components are not dispersed are solved; the material has the characteristics of dynamic wave absorbing performance, high strength, excellent flow diffusivity, high temperature resistance and the like, and can effectively reinforce surrounding rocks in high-stress, high-ground-temperature and dynamic disturbance environments.

This film comprises an elastomer layer (11) on a base material (30), and the elastomer layer has a stress relaxation rate of 70% or more in at least one direction, as calculated using formula 1. [Formula 1] Stress relaxation rate (%) = (A-B) / A×100 Taking at least one direction as a length direction, the elastomer layer is cut to a length of 10 mm and a width of 30 mm to obtain a strip-shaped test piece. The strip-shaped test piece is pulled in the length direction at a tension speed of 200 mm / min in an environment of a temperature of 25°C and a relative humidity of 45% using a tensile tester, and pulling is stopped when an elongation of 50% is reached. The stress value of the elastomer layer is measured continuously from the start of pulling until 30 seconds after extension has stopped. Defining the stress value indicating the highest stress during the measurement time as "A" (N), and the stress value 30 seconds after extension has stopped as "B" (N), the stress relaxation rate (%) of the elastomer layer is calculated on the basis of formula 1.

The invention discloses glass, a preparation method and application, and relates to the technical field of glass manufacturing. Wherein the glass comprises the following components: silicon dioxide, aluminum oxide, boric oxide, sodium oxide, potassium oxide, magnesium oxide and calcium oxide; wherein the weight relation of the silicon dioxide, the aluminum oxide and the boron oxide meets a specific quantitative relation, and the weight relation of the seven components meets another specific quantitative relation. The prepared glass has high stress intensity and stress depth, and the scratch resistance and impact resistance of the glass enable the glass to meet the requirements of display equipment of an intelligent terminal and the like.

The utility model provides a concrete filled steel tube arch frame semi-flange connection node structure. The concrete filled steel tube arch frame semi-flange connection node structure structurally comprises a concrete filled steel tube arch frame, a semi-flange plate connection part, a screw rod, a nut, a waterproof layer and CFRP fiber cloth, the half flange plate connecting part is a half flange plate provided with a groove, and the lower half part of the connecting joint of the outer steel pipe is placed in the groove of the half flange plate and is welded with the half flange plate; waterproof layers are laid on the outer side and the periphery of the top of the connecting joint, and the waterproof layers of the connecting joint and the half flange plate connecting part are integrally bundled through CFRP fiber cloth. According to the structure, the problem of stress concentration on the contact surface of a traditional full-flange connection structure and surrounding rock can be effectively solved while the advantages of a traditional flange connection node are reserved. In tunnel engineering under the high-stress surrounding rock condition, the node structure can adapt to the large-deformation working condition of the surrounding rock, and a good choice is provided for supporting design of the concrete-filled steel tube tunnel under the complex geological condition.

The utility model relates to the technical field of buildings, in particular to a module assembly type steel structure combination column and an assembly system, which comprises a steel pipe column, the steel pipe column consists of a plurality of steel frames, the steel frames are L-shaped or U-shaped, and an accommodating space is formed in the steel pipe column; the steel pipe column and the stirrup cage are combined, then the longitudinal load-bearing steel bars are inserted, cement is poured into the steel pipe column, the combined column is formed, and an independent module column of an original horizontal adjacent module is replaced with the combined column, so that the lateral force resistance of the structure can be improved, and the structure has higher stress performance; and the space occupied by the combination of a plurality of module columns is reduced.

The embodiment of the invention discloses a multi-stage collaborative supporting method and structure for an ultra-deep well large-span chamber, and the method comprises the following steps: firstly identifying an overlying key rock stratum and calculating a pressure relief range, carrying out'skylight opening 'excavation on the overlying key rock stratum of the large-span chamber to realize high stress transfer and pressure relief, and releasing pressure for the large-span chamber to be excavated. The cavern is in a low-stress state, and dynamic disasters such as rock burst and the like caused by cavern stress concentration or high-stress cavern large-deformation disasters are reduced; precise excavation is carried out to form a chamber, first-time supporting is carried out, high-pretightening-force yielding anchor cables are applied to a top plate and side parts, and a deep and shallow part cooperative bearing layer is formed through long anchor cables and short anchor cables; and then secondary supporting is carried out, loosening blasting pressure relief is carried out on the base angles, a high-strength concrete-filled steel tube support is erected, and the space between the high-strength concrete-filled steel tube support and the surrounding rock is filled with a yielding back plate. And then grouting anchor cables are constructed at the bottom corners to block stress transfer, and pressure relief drill holes are constructed in the top slope part to regulate and control the surrounding rock stress. And finally, an anti-slide pile is vertically arranged in the center of the bottom plate.

The invention relates to the technical field of ultra-clean HDPE (high-density polyethylene) barrels, and particularly discloses a multi-sealing anti-leakage structure of an ultra-clean HDPE barrel. The upper surface of the barrel body is communicated with a connecting pipe, and the tail end of the connecting pipe is provided with a pressure balancing assembly used for balancing the pressure in the barrel. By means of the arranged pressure balancing assembly, high-pressure gas can push a sealing block to move vertically through a fixing plate on an exhaust part, the gas is exhausted through a gap between the sealing block and the exhaust part and is exhausted to the outside through a through hole in the exhaust part, the automatic pressure relief effect is achieved, and when an adjusting screw is screwed, under the cooperation of a fixing bearing, the sealing block is not prone to falling off. The adjusting part can be driven to move in the vertical direction, the distance between the guide sleeve and the sealing block can be adjusted, then the tension of the compression spring is adjusted, when the pressure of the barrel body is small, the pressure cannot be exhausted through the exhaust part, the sealing block can only be pushed through large pressure, and then automatic pressure relief of different materials can be conveniently achieved.

The utility model relates to the technical field of waterproof rubber jackets, in particular to a high-temperature waterproof rubber jacket with excellent weather resistance, which comprises a rubber jacket body, a mounting hole is formed in the middle of the rubber jacket body in a penetrating manner, a threaded mounting groove is formed in the inner wall of the mounting hole, staggered ribs are arranged on the inner wall of the rubber jacket body, and the threaded mounting groove is communicated with the staggered ribs. The staggered ribs are arranged on the inner wall of the rubber sleeve body in a grid-shaped staggered mode, and the inner walls of the two sides, close to the mounting hole, of the rubber sleeve body are fixedly connected with annular ribs. When the waterproof rubber sleeve is subjected to internal and external pressure, the staggered ribs and the annular ribs arranged in the waterproof rubber sleeve can provide relatively strong supporting force for the interior of the waterproof rubber sleeve, effectively disperse stress, avoid local stress concentration and increase the overall rigidity of the structure, and the reinforcing ribs are used for supporting the connecting part and the high-stress bearing area of the waterproof rubber sleeve, so that the waterproof rubber sleeve is not prone to deformation. The risk of breakage of the waterproof rubber sleeve is reduced, the weather resistance of the waterproof rubber sleeve is improved, the rigidity is improved, and deformation of materials is reduced.

The present invention provides a portable clamp for cable protection, including a fastening device, a rigid protective body, a foldable rubber protective sleeve and a fixing clamp. The foldable rubber protective sleeve is connected between the first rigid protective body and the second rigid protective body. The rigid protective body and the foldable rubber protective sleeve are integrally sleeved on the outside of the cable. The fastening device is threadedly connected on the side wall of the rigid protective body. The fastening device fixes the clamp to the part of the cable that needs to be protected. The fixing clamp is connected to the side wall of the first rigid protective body, and the cable is connected and fixed to the external device through the fixing clamp. The present invention has a compact structure and a small size. It greatly reduces the large stress on the cable when there is a height difference between the cable and the connecting device. It has an excellent protection effect on the cable in special parts and prevents the cable from being worn. It is also highly versatile and suitable for cables of any form and type. It has a low production cost and can greatly reduce the maintenance cost of the cable.

The application provides a heat absorption tower structure system of a tower type photo-thermal power station, which comprises a heat absorber, a concrete cylinder, a vertical cylinder, a steel frame, a reinforcing mechanism, a first connecting mechanism and a second connecting mechanism. The vertical cylinder is arranged in the cavity of the concrete cylinder and partially extends out of the concrete cylinder, the steel frame is arranged above the concrete cylinder and surrounds the outside of the vertical cylinder, and the heat absorber is arranged on the steel frame. The reinforcing mechanism is connected between the concrete cylinder and the steel frame to limit the movement of the steel frame relative to the concrete cylinder, thereby realizing the vertical conversion of the steel-concrete structure. The first connecting mechanism fixedly connects the concrete cylinder and the vertical cylinder to form a rigid horizontal connection of the lower tower body. The second connecting mechanism connects the steel frame and the vertical cylinder and allows the relative horizontal displacement of the two within a preset range. The heat absorption tower structure system has high stress synergy and deformation coordination capability, can reduce the construction cost, and meets the requirements of high reliability, light weight and stable support of the heat absorption tower of the tower type photo-thermal power station.

The utility model relates to the technical field of high-pressure flexible composite pipe joints, in particular to a metal joint for a high-pressure flexible composite pipe. The metal joint for the high-pressure flexible composite pipe comprises an external locking pipe fitting, locking sliding blocks are evenly arranged on the inner side wall of the external locking pipe fitting, and the left side area of each locking sliding block is larger than the right side area of each locking sliding block. The metal joint is sealed by the internal locking pipe fitting and a plurality of groups of inner side O-shaped rings, so that the metal joint can be tightly attached to the fiber-reinforced flexible composite pipe under continuous high pressure, and the connection stability under the continuous high pressure is further ensured; when the conical metal locking sliding block is fastened to the outer wall of the fiber-reinforced flexible composite pipe, it can be guaranteed that enough locking force is provided for fastening the connecting flange of the metal connector to the outer wall of the pipe, so that the pipe has great tensile strength after being connected through the connector, and meanwhile the situation that the metal connector and the outer wall of the pipe are loosened is not prone to occurring.

The invention relates to the field of extrusion dies, and discloses a homogenization-free aluminum bar extrusion die which comprises a die body, a gear ring is rotatably mounted on the die body, a polishing mechanism is fixedly mounted on the gear ring, and the polishing mechanism extrudes an aluminum bar discharged from the die body; a pressurizing mechanism is meshed with the gear ring, controls the grinding mechanism to rotate around the aluminum bar and cleans the grinding position of the grinding mechanism; an adjusting mechanism is fixedly mounted at the top of the pressurizing mechanism, and the adjusting mechanism changes the cleaning angle of the pressurizing mechanism to the aluminum bar in the process that the polishing mechanism rotates around the aluminum bar; the cambered surface polishing block can eliminate tiny protrusions and smooth burrs on the surface of the aluminum bar through flexible extrusion, and damage to a base body due to excessive polishing is avoided; the sharp-corner polishing block effectively removes stubborn protruding flaws by means of the high stress concentration characteristic, and the cleaning effect of the polishing block on the aluminum bar can be controlled by controlling the compression amount of the first spring.

The application discloses a kind of thermoplastic composite continuous forming methods.The system includes successively in the direction of material travel: multiple roll unwinding mechanism, flattening arrangement, continuous mould pressing device and double steel belt presser.Wherein, continuous mould pressing device is made of multiple independent presser module, for applying 5-15MPa high pressure to realize the sufficient impregnation of resin to fiber;Double steel belt presser follows immediately, for applying 1-3MPa low pressure to eliminate surface indentation generated in mould pressing process.The application is by high pressure impregnation and low pressure finishing function clear distinction and collaborative use, overcome the technical contradiction that impregnation quality and surface quality are difficult to obtain in prior art, both ensure the excellent internal impregnation quality of composite material, also obtain high surface flatness, realize the continuous production of high-quality thermoplastic composite plate.

The application discloses an alloy material resistant to acid and alkali corrosion and a preparation method and products thereof, and the alloy material is composed of 20.5-21.0 wt% Cr, 6.0-6.5 wt% Mo, 17.5-18.5 wt% Ni, 0.18-0.22 wt% N, 0.8-1.2 wt% Cu, 0.05-0.1 wt% Ce, ≤0.02 wt% C and the balance of Fe and inevitable impurities. Through multidirectional synergistic design, the core requirements of excellent corrosion resistance, high strength and long service life under strong acid / alkali and high stress working conditions are realized, and the alloy material is particularly suitable for precision ball screw support bearings in harsh environments such as semiconductor cleaning equipment.

The present invention relates to safe strengthened glass with a low-variation-amplitude tensile stress region, a preparation method and an application. The change curve of the compressive stress and tensile stress of the strengthened glass meets a specific function relationship; within the range of 0.45-0.85 mm, the stress distribution meets the following condition: the stress curve is within the following Log-PI function range, the upper limit Fmax of the compressive stress meets the formula (1): Fmax=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)), and the lower limit Fmin of the compressive stress meets the formula (2): Fmin=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)); or the chemically strengthened glass comprises a first stress region and a second stress region, wherein the stress range of a first subregion in the first stress region includes that the minimum value of the stress difference value of the glass thickness t in the region of 0-10 micrometers is greater than 1 Mpa; and the pressure difference value of the second stress region is smaller than that of the first stress region. The deep compressive stress region of the strengthened glass has relatively high stress, and the tensile stress region has very-low-degree variation amplitude, so that the glass has excellent mechanical strength, very high stability and very high safety.

In one or more embodiments, a chemically strengthened glass-based article includes a first major surface and an opposing second major surface defining a thickness t of the glass article; a stress profile [sigma] (x) extending through the thickness t of the glass article; a first compressive stress layer extending to a first depth DOC1 of greater than about 0.15 t; a second compressive stress layer extending from the second major surface to a second depth of compression DOC2 less than or equal to DOC1; and a central tension zone positioned between the first compressive stress layer and the second compressive stress layer and including a peak tension PT and a tension zone width BTZ spanning DOC1 to tDOC2. In an embodiment, the following criteria are satisfied: wherein DOC = DOC1 and is the slope of the stress profile sigma (x) at DOC; ; and wherein TA is the tension area, defined as follows.