Thin glass fracture toughness testing method and device applied to thin glass fracture toughness testing method

Abstract

The invention relates to the technical field of glass detection, and provides a thin glass fracture toughness testing method and a device applied to the thin glass fracture toughness testing method.The thin glass fracture toughness testing method comprises the following steps that S10, thin glass is abraded, specifically, the thin glass is abraded through an abrasion testing device, and initial cracks are generated on the thin glass; s20, standing the thin glass, namely standing the thin glass for 5-24 hours after the thin glass is worn, so as to ensure that the thin glass does not lose efficacy; step S30, breaking the thin glass: carrying out a double-ring test on the thin glass through a glass breaking strength testing device, and breaking the thin glass; and S40, calculating the fracture toughness of the thin glass, obtaining a crack cross-sectional view of the fractured thin glass through a microscope, and obtaining the fracture toughness of the thin glass through calculation. According to the technical scheme, the problem that in the prior art, it is difficult to measure the fracture toughness of the thin glass is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of glass testing, and in particular to a thin glass fracture toughness testing method and a device applied thereto. Background Art

[0002] Fracture toughness is a parameter used to measure the material's ability to resist crack propagation, also known as the critical stress intensity factor. There are many methods for measuring fracture toughness, including: single-sided pre-crack (SEPB), single-sided notched beam method (SENB), single-sided V-shaped notched beam method (SEVNB), curved surface crack method (SCF), micro-nano scratch method and Vickers indentation method. Due to factors such as the difficulty in sample preparation or the difficulty in controlling the quality of the incision, among these methods, only the Vickers indentation method is widely used to measure the fracture toughness of thin glass. When the Vickers indentation method is used to test brittle materials, the cracks generated are composed of intersecting, orthogonal, and interacting three-dimensional networks, but only the length of the crack along the diagonal of the indentation is considered during the measurement, making it difficult to ensure the accuracy of the measurement results, and the experimental results cannot be compared with each other. As a result, a large number of correction formulas have been generated, and the test methods cannot be unified.

[0003] In the prior art (for example, application number: 201610217316.5; title: A method for measuring the fracture toughness of a glass plate), a method for measuring the fracture toughness of a glass plate is disclosed, which includes measuring the thickness and width of a glass plate sample; performing a slit process on the long side of the glass plate sample along the width direction and measuring the slit depth; placing the glass plate with the slit facing downward for a three-point bending test, measuring the fracture load of the glass plate sample, and calculating the fracture toughness value of the glass plate sample according to a formula. However, due to the small thickness of thin glass, it is difficult to obtain a slit that meets the requirements during the slit process, so it is difficult to measure the fracture toughness of thin glass. Summary of the invention

[0004] A technical problem to be solved by the present application is that it is difficult to measure the fracture toughness of thin glass.

[0005] In order to solve the above technical problems, the present application provides a thin glass fracture toughness testing method, comprising the following steps: step S10: thin glass wear, the thin glass is worn by a wear test device, and initial cracks are generated in the thin glass; step S20: the thin glass is allowed to stand, and the thin glass is allowed to stand for 5 to 24 hours after the wear is completed to ensure that the thin glass will not fail; step S30: the thin glass is broken, a double ring test is performed on the thin glass by a glass fracture strength testing device, and the thin glass is broken; step S40: the fracture toughness of the thin glass is calculated, the crack cross-section of the thin glass after fracture is obtained through a microscope, and the fracture toughness of the thin glass is obtained by calculation.

[0006] In some embodiments, the glass fracture strength testing device includes a support ring and a loading ring, which are arranged relative to each other. The thin glass is broken by placing the thin glass on the support ring, the loading ring and the thin glass are in contact, and the loading ring is gradually pressed down to break the thin glass.

[0007] In some embodiments, the calculation of the fracture toughness of thin glass requires obtaining the critical fracture stress of the thin glass, and the calculation formula of the critical fracture stress is:

[0008]

[0009] Where:

[0010] σ f is the critical fracture stress, MPa;

[0011] P is the critical breaking load, directly read by the glass breaking strength test device, N;

[0012] t is the glass thickness, mm;

[0013] v is the Poisson's ratio of thin glass;

[0014] R S is the radius of the support ring, mm;

[0015] R L is the radius of the loading ring, mm;

[0016] R is the equivalent radius of the thin glass, R=0.27(L1+L2), where L1 and L2 are the length and width of the thin glass, respectively, in mm.

[0017] In some embodiments, the fracture toughness of thin glass is calculated as:

[0018]

[0019] Where:

[0020] is the fracture toughness of thin glass;

[0021] σ f is the critical fracture stress, MPa;

[0022] Y is the shape factor of the crack, which is obtained according to the type of crack section in the crack cross-section diagram.

[0023] is a dimensionless constant;

[0024] C is the initial crack depth, calculated proportionally from the crack cross-section diagram, mm.

[0025] In some embodiments, when the crack cross section is a semicircular or hemispherical crack cross section, the shape factor Y takes a value of 1.33.

[0026] In some embodiments, thin glass abrasion includes the following steps: Step S101: prepare abrasive material, which is silicon carbide particles with a mesh size of 60 to 120; Step S102: place the thin glass on the abrasion platform and fix it with a clamp, with the abrasive surface of the thin glass facing the abrasive shell, and the abrasive shell and the abrasive platform fitting together to achieve sealing; Step S103: open the pressurized air intake system, load the abrasive material into the abrasion test device and perform a abrasion operation on the thin glass; Step S104: take out the thin glass after the abrasion is completed, and use the pressurized air intake system to discharge the remaining abrasive material from the exhaust duct.

[0027] The present application also provides a wear test device, which is applied to a thin glass fracture toughness test method. The wear test device includes: a support frame, a wear platform, a wear shell, a funnel, a pressurized air intake system and an exhaust duct. The support frame is installed on the ground. A cylinder or a folding rod is installed at the bottom of the wear platform. The wear shell has a accommodating space, and the wear shell is installed on the support frame through a first support rod, and the wear shell is located above the wear platform. The funnel is installed on the support frame through a second support rod, and the funnel is connected to the wear shell, and the funnel is located above the wear shell. The pressurized air intake system includes an air intake duct and a pressurized air intake device, and the first end of the air intake duct is connected to an external pressurized air intake device, and the second end of the air intake duct passes through the funnel and extends into the wear shell. The exhaust duct is connected to the side wall of the wear shell.

[0028] In some embodiments, the pressure of the wear gas provided by the pressurized air intake device is between 34.5 kPa and 310.3 kPa.

[0029] The present application also provides a glass fracture strength test device, which is applied to the thin glass fracture toughness test method, and the glass fracture strength test device includes: a support structure and a fracture structure. The support structure includes a base, a mounting plate and a lifting rod, the mounting plate is arranged on the base, and the lifting rod is arranged on the mounting plate. The fracture structure includes a support ring, a loading ring, a first mounting block, a second mounting block and a force sensor, the support ring is arranged on the first mounting block, the first mounting block is arranged on the base, the loading ring is arranged on the second mounting block, the second mounting block is connected to the lifting rod, and the thin glass is placed on the support ring.

[0030] In some embodiments, the surface of the thin glass in contact with the loading ring is covered with a polymer tape, and a polytetrafluoroethylene film is placed on the side of the support ring facing the thin glass.

[0031] Through the above technical scheme, the thin glass fracture toughness test method provided by the present application includes thin glass wear, thin glass static, thin glass fracture and calculation of thin glass fracture toughness. The thin glass is worn by a wear test device, and an initial crack is generated in the thin glass. The thin glass can be broken along the initial crack in the subsequent fracture operation, and the fracture position is controllable for easy observation and calculation. After the thin glass is worn, it is left to stand for 5 to 24 hours to ensure that the thin glass will not fail. Standing can ensure that the tiny fractures that form the initial cracks have stopped before the subsequent fracture operation. The thin glass is subjected to a double ring test by a glass fracture strength test device, and the thin glass is fractured. The glass fracture strength test device can read the relevant data during the double ring test. The crack cross-section of the thin glass after fracture is obtained by a microscope, and the fracture toughness of the thin glass is obtained by calculation. The technical scheme of the present application effectively solves the difficulty in measuring the fracture toughness of thin glass in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 is a schematic flow chart of a method for testing the fracture toughness of thin glass according to an embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of a specific process of thin glass abrasion according to an embodiment of the present application;

[0035] Figure 3 is a schematic structural diagram of a wear test device according to an embodiment of the present application;

[0036] Figure 4 Schematic diagram of the structure of the glass fracture strength testing device according to the embodiment of the present application.

[0037] The above drawings include the following reference numerals:

[0038] 10. Wear test device; 11. Support frame; 12. Wear platform; 13. Wear shell; 14. Funnel; 15. Pressurized air intake system; 151. Air intake duct; 16. Exhaust duct; 20. Glass fracture strength test device; 21. Support structure; 211. Base; 212. Mounting plate; 213. Lifting rod; 22. Fracture structure; 221. Support ring; 222. Loading ring; 223. First mounting block; 224. Second mounting block. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0040] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0041] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0042] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0043] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0044] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0045] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0046] like Figure 1 As shown, the embodiment relates to a method for testing the fracture toughness of thin glass, comprising the following steps: step S10: wearing the thin glass, wearing the thin glass by a wear test device 10, and causing an initial crack to appear in the thin glass; step S20: letting the thin glass stand, after the thin glass is worn, letting it stand for 5 to 24 hours to ensure that the thin glass will not fail; step S30: breaking the thin glass, performing a double ring test on the thin glass by a glass fracture strength test device 20, and causing the thin glass to break; step S40: calculating the fracture toughness of the thin glass, obtaining a crack cross-section diagram of the thin glass after breaking by a microscope, and obtaining the fracture toughness of the thin glass by calculation.

[0047] The thin glass fracture toughness test method provided by the present application includes thin glass wear, thin glass static, thin glass fracture and calculation of thin glass fracture toughness. The thin glass is worn by a wear test device, and an initial crack is generated in the thin glass. The thin glass can be broken along the initial crack in the subsequent fracture operation, and the fracture position is controllable for easy observation and calculation. After the thin glass is worn, it is left to stand for 5 to 24 hours to ensure that the thin glass will not fail. Standing can ensure that the tiny fractures that form the initial cracks have stopped before the subsequent fracture operation. The thin glass is subjected to a double ring test by a glass fracture strength test device, and the thin glass is fractured. The glass fracture strength test device can read the relevant data during the double ring test. The crack cross-section of the thin glass after fracture is obtained by a microscope, and the fracture toughness of the thin glass is obtained by calculation. The technical solution of the present application effectively solves the difficulty in measuring the fracture toughness of thin glass in the prior art.

[0048] like Figure 4 As shown, in some embodiments, the glass fracture strength testing device 20 includes a support ring 221 and a loading ring 222, the support ring 221 and the loading ring 222 are arranged opposite to each other, and the thin glass is broken by placing the thin glass on the support ring 221, the loading ring 222 and the thin glass are in contact, and the loading ring 222 is gradually pressed down to break the thin glass. The force sensor reads the critical fracture load P when the thin glass breaks.

[0049] In some embodiments, the calculation of the fracture toughness of thin glass requires obtaining the critical fracture stress of the thin glass, and the calculation formula of the critical fracture stress is:

[0050]

[0051] Where:

[0052] σ f is the critical fracture stress, MPa;

[0053] P is the critical breaking load, directly read by the glass breaking strength test device 20, N;

[0054] t is the glass thickness, mm;

[0055] v is the Poisson's ratio of thin glass;

[0056] R S is the radius of the support ring 221, mm;

[0057] R L is the radius of the loading ring 222, mm;

[0058] R is the equivalent radius of the thin glass, R=0.27L1+L2, where L1 and L2 are the length and width of the thin glass, respectively, in mm.

[0059] It should be noted that thin glass is glass with a thickness greater than or equal to 1.1 mm and less than 3 mm. In this embodiment, the long size of thin glass is 50*50 mm, the thickness range is 0.55-2.0 mm, and the sample capacity is 30. Substituting the data into the calculation formula of critical fracture stress, the critical fracture stress value can be obtained.

[0060] In some embodiments, the fracture toughness of thin glass is calculated as:

[0061]

[0062] Where:

[0063] is the fracture toughness of thin glass;

[0064] σ f is the critical fracture stress, MPa;

[0065] Y is the shape factor of the crack, which is obtained according to the type of crack section in the crack cross-section diagram.

[0066] is a dimensionless constant;

[0067] C is the initial crack depth, calculated proportionally from the crack cross-section diagram, mm.

[0068] Specifically, since the size of the crack cross-section is obtained by reducing the actual size of the thin glass surface, the size of the crack cross-section is proportional to the size of the thin glass surface, and the crack displayed on the crack cross-section is also proportional to the size of the entire crack cross-section. Therefore, the proportional relationship between the initial crack depth and the actual size of the thin glass can be obtained based on the proportional relationship between the crack displayed on the crack cross-section and the entire crack cross-section. The actual size of the thin glass has been determined, so the value of the initial crack depth C can be calculated. When the crack cross section is a semicircular or hemispherical crack cross section, the shape factor Y is 1.33. At this time, the data is substituted into the formula to obtain the fracture toughness of the thin glass.

[0069] like Figure 2 and Figure 3 As shown, in some embodiments, the thin glass wear includes the following steps: Step S101: prepare wear material, the wear material is 60 mesh to 120 mesh silicon carbide particles; Step S102: place the thin glass on the wear platform 12 and fix it by a clamp, the wear surface of the thin glass faces the wear shell 13, and the wear shell 13 and the wear platform 12 fit together to achieve sealing; Step S103: open the pressurized air intake system 15, load the wear material into the wear test device 10 and perform a wear operation on the thin glass; Step S104: after the wear is completed, take out the thin glass, and use the pressurized air intake system 15 to discharge the remaining wear material from the exhaust pipe 16. Driven by the pressurized gas, the wear material continuously scours the surface of the thin glass, and the area most severely scour is the position opposite to the pressurized air intake system 15. Figure 4 The initial crack depth is shown in the figure.

[0070] like Figure 3As shown, this embodiment also provides a wear test device, which is applied to the thin glass fracture toughness test method. The wear test device 10 includes: a support frame 11, a wear platform 12, a wear shell 13, a funnel 14, a pressurized air intake system 15 and an exhaust pipe 16. The support frame 11 is installed on the ground. A cylinder or a folding rod is installed at the bottom of the wear platform 12, so that the height of the wear platform 12 can be adjusted. The wear shell 13 has a accommodating space, and the wear material flies in the wear shell 13 to achieve scouring so that the thin glass forms an initial crack. The wear shell 13 is installed on the support frame 11 through a first support rod, and the wear shell 13 is located above the wear platform 12. The funnel 14 is installed on the support frame 11 through a second support rod, and the funnel 14 is connected to the wear shell 13, and the funnel 14 is located above the wear shell 13. The pressurized air intake system 15 includes an air intake pipe 151 and a pressurized air intake device. The first end of the air intake pipe 151 is connected to the external pressurized air intake device. The second end of the air intake pipe 151 passes through the funnel 14 and extends into the wear shell 13 to deliver the pressurized gas into the wear shell 13. The exhaust pipe 16 is connected to the side wall of the wear shell 13. After the wear is completed, the excess wear material is discharged from the exhaust pipe 16. It should be noted that there is a gap between the air intake pipe and the inner wall of the funnel 14. The wear material flows from the gap into the wear shell 13. The setting of the gap is based on the flow of the wear material. If the gap is too large, the wear material will rebound during wear.

[0071] In some embodiments, the abrasion air pressure provided by the pressurized air intake device is between 34.5 kPa and 310.3 kPa. If the abrasion air pressure is less than 34.5 kPa, the abrasion material cannot be driven to fly to achieve abrasion of the thin glass. If the abrasion air pressure is greater than 310.3 kPa, the impact force of the abrasion material on the thin glass will be too large, and even the thin glass will break. In this embodiment, the abrasion air pressure is 70 kPa.

[0072] like Figure 4As shown, this embodiment also provides a glass fracture strength test device, which is applied to the thin glass fracture toughness test method, and the glass fracture strength test device 20 includes: a support structure 21 and a fracture structure 22. The support structure 21 includes a base 211, a mounting plate 212 and a lifting rod 213, the mounting plate 212 is arranged on the base 211, and the lifting rod 213 is arranged on the mounting plate 212. The fracture structure 22 includes a support ring 221, a loading ring 222, a first mounting block 223, a second mounting block 224 and a force sensor, the support ring 221 is arranged on the first mounting block 223, the first mounting block 223 is arranged on the base 211, the loading ring 222 is arranged on the second mounting block 224, the second mounting block 224 is connected to the lifting rod 213, and the thin glass is placed on the support ring 221. The lifting rod 213 is a cylinder, which drives the second mounting block 224 to move, and then drives the loading ring 222 to move, so as to adjust the force acting on the thin glass. The thin glass is placed on the support ring 221. The diameter of the support ring 221 is larger than the diameter of the loading ring 222. The support ring 221 and the loading ring 222 are concentrically arranged. The initial crack is located in the loading ring 222. As the loading ring 222 moves downward, the thin glass is broken. The force sensor is arranged in the first mounting block 223, and can measure the force applied by the loading ring 222 to obtain the critical breaking load when the thin glass breaks.

[0073] like Figure 4 As shown, in some embodiments, the surface of the thin glass in contact with the loading ring 222 is covered with a polymer tape, and a polytetrafluoroethylene film is placed on the side of the support ring 221 facing the thin glass. The polymer tape can prevent glass fragments from flying when the thin glass breaks, and the polytetrafluoroethylene film can reduce scratches on the surface of the thin glass.

[0074] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0075] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for testing the fracture toughness of thin glass, characterized in that: The following steps are involved: Step S10: Wearing the thin glass, wearing the thin glass by using the wear test device (10) to cause initial cracks to form on the thin glass; Step S20: the thin glass is allowed to stand for 5 to 24 hours after being worn to ensure that the thin glass does not fail; Step S30: the thin glass is broken, and a double ring test is performed on the thin glass by using a glass breaking strength testing device (20) to make the thin glass break; Step S40: calculating the fracture toughness of the thin glass, obtaining a crack cross-section of the thin glass after fracture through a microscope, and obtaining the fracture toughness of the thin glass through calculation.

2. The thin glass fracture toughness testing method according to claim 1, characterized in that: The glass fracture strength testing device (20) comprises a support ring (221) and a loading ring (222), wherein the support ring (221) and the loading ring (222) are arranged opposite to each other, and the thin glass is fractured by placing the thin glass on the support ring (221), the loading ring (222) and the thin glass abutting against each other, and the loading ring (222) is gradually pressed downward to fracture the thin glass.

3. The thin glass fracture toughness testing method according to claim 2, characterized in that: The calculation of the fracture toughness of thin glass requires obtaining the critical fracture stress of the thin glass, and the calculation formula of the critical fracture stress is: Where: σ f is the critical fracture stress, MPa; P is the critical breaking load, directly read by the glass breaking strength testing device (20), N; t is the glass thickness, mm; v is the Poisson's ratio of thin glass; R S is the radius of the support ring (221), mm; R L is the radius of the loading ring (222), mm; R is the equivalent radius of the thin glass, R=0.27(L1+L2), where L1 and L2 are the length and width of the thin glass, respectively, in mm.

4. The thin glass fracture toughness testing method according to claim 3, characterized in that: The calculation formula of the fracture toughness of thin glass is: Where: is the fracture toughness of thin glass; σ f is the critical fracture stress, MPa; Y is the shape factor of the crack, which is obtained according to the type of crack section in the crack cross-section diagram, is a dimensionless constant; C is the initial crack depth, calculated proportionally from the crack cross-section diagram, mm.

5. The thin glass fracture toughness testing method according to claim 4, characterized in that: When the crack cross section is a semicircular or hemispherical crack cross section, the shape factor Y is 1.

33.

6. The thin glass fracture toughness testing method according to claim 1, characterized in that: The thin glass abrasion comprises the following steps: Step S101: preparing abrasive material, wherein the abrasive material is silicon carbide particles of 60 to 120 meshes; Step S102: placing the thin glass on the wear platform (12) and fixing it by a clamp, with the wear surface of the thin glass facing the wear shell (13), and the wear shell (13) and the wear platform (12) being fitted together to achieve sealing; Step S103: opening the pressurized air intake system (15), loading the wear material into the wear test device (10) and performing a wear operation on the thin glass; Step S104: After the wear is completed, the thin glass is taken out, and the pressurized air intake system (15) is used to discharge the remaining wear material from the exhaust pipe (16).

7. A wear test device, characterized in that: The wear test device is applied to the thin glass fracture toughness test method, which is the thin glass fracture toughness test method according to any one of claims 1 to 6. The wear test device (10) comprises: A support frame (11), wherein the support frame (11) is installed on the ground; A wear platform (12), wherein a cylinder or a folding rod is installed at the bottom of the wear platform (12); A wear shell (13), the wear shell (13) having a receiving space, the wear shell (13) being mounted on the support frame (11) via a first support rod, and the wear shell (13) being located above the wear platform (12); A funnel (14), wherein the funnel (14) is mounted on the support frame (11) via a second support rod, the funnel (14) is connected to the wear shell (13), and the funnel (14) is located above the wear shell (13); A pressurized air intake system (15), the pressurized air intake system (15) comprising an air intake pipe (151) and a pressurized air intake device, a first end of the air intake pipe (151) being connected to the external pressurized air intake device, and a second end of the air intake pipe (151) passing through the funnel (14) and extending into the wear shell (13); An exhaust pipe (16), wherein the exhaust pipe (16) is in communication with a side wall of the wear shell (13).

8. The wear testing device according to claim 7, characterized in that: The pressure of the wear gas provided by the pressurized air intake device is between 34.5 kPa and 310.3 kPa.

9. A glass fracture strength testing device, characterized in that: The glass fracture strength testing device is applied to the thin glass fracture toughness testing method, the thin glass fracture toughness testing method is the thin glass fracture toughness testing method according to any one of claims 1 to 6, and the glass fracture strength testing device (20) comprises: A supporting structure (21), the supporting structure (21) comprising a base (211), a mounting plate (212) and a lifting rod (213), the mounting plate (212) being arranged on the base (211), and the lifting rod (213) being arranged on the mounting plate (212); A fracture structure (22), the fracture structure (22) comprising a support ring (221), a loading ring (222), a first mounting block (223), a second mounting block (224) and a force sensor, the support ring (221) being arranged on the first mounting block (223), the first mounting block (223) being arranged on the base (211), the loading ring (222) being arranged on the second mounting block (224), the second mounting block (224) being connected to the lifting rod (213), and the thin glass being placed on the support ring (221).

10. The glass breaking strength testing device (20) according to claim 9, characterized in that: The surface of the thin glass in contact with the loading ring (222) is covered with a polymer tape, and a polytetrafluoroethylene film is placed on the side of the support ring (221) facing the thin glass.

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