Shearing performance test fixture and device

Abstract

The invention relates to a shearing performance testing jig and device.The shearing performance testing jig comprises at least one jig body, the jig body comprises a connecting part and a plurality of sample fixing parts, and the ends, away from the connecting part, of the sample fixing parts are provided with shearing faces; the shearing surfaces of the two opposite sample fixing parts of the two jig bodies used in cooperation are parallel to each other, the test included angles corresponding to at least part of the sample fixing parts are different, and the test included angles are the included angles between the planes where the shearing surfaces are located and the first direction. According to the shearing performance testing jig, the plurality of sample fixing parts are arranged in the jig body, each two opposite sample fixing parts fix one shearing sample, and the included angles between the planes where the shearing surfaces of at least part of the sample fixing parts are located and the stretching direction are different, so that the shearing performance of the plurality of shearing samples can be tested at a plurality of shearing angles; the influence of other variables except the shearing angle on the test result is reduced or avoided, the test accuracy is improved, and the test efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of mechanical property testing technology, and in particular to a shear property testing fixture and apparatus. Background Technology

[0002] Optically clear adhesive (OCA) is a colorless, transparent, and adhesive adhesive widely used in the field of electronic equipment technology to fix transparent optical components (such as lenses) in electronic devices.

[0003] Debonding and breakage of transparent optical adhesives can lead to the failure of electronic devices and affect the user experience. In related technologies, the mechanical property testing of transparent optical adhesives has a long cycle and the uncontrollable variables result in low test accuracy. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a shear performance testing fixture and apparatus.

[0005] According to a first aspect of this disclosure, a shear performance testing fixture is provided, comprising at least one fixture body, the fixture body comprising:

[0006] Connecting part;

[0007] Multiple sample fixing parts are provided on the side of the connecting part. The end of the sample fixing part away from the connecting part has a shearing surface. When the two fixture bodies used in the assembly state are in the same state, the shearing surfaces of the two opposing sample fixing parts are parallel to each other and define a receiving area. The receiving area is used to place the sheared sample.

[0008] Wherein, at least some of the sample fixing parts correspond to different test angles, the test angle being the angle between the plane where the shear surface is located and the first direction, the first direction being the direction of relative movement of the two fixture bodies used in cooperation.

[0009] In some embodiments, the sample fixing part is provided on one side of the connecting part; and / or,

[0010] The sample fixing part is provided on both sides of the connecting part.

[0011] In some embodiments, the shear performance testing fixture includes three fixture bodies, which are arranged sequentially along a direction perpendicular to the connecting portion;

[0012] Along the arrangement direction, multiple sample fixing parts are provided on both sides of the fixture body located in the middle.

[0013] In some embodiments, the connecting portion is elongated, and a plurality of the sample fixing portions are arranged along the extending direction of the connecting portion.

[0014] In some embodiments, the distance between any two opposite shear planes is equal.

[0015] In some embodiments, the distance between two adjacent sample fixing portions located on the same side of the connecting portion is greater than or equal to 1 mm.

[0016] In some embodiments, a displacement sensor is provided on the specimen fixing part, the displacement sensor being used to detect the deformation of the sheared specimen; and / or,

[0017] A load sensor is provided on the specimen fixing part, and the load sensor is used to detect the load on the shear specimen when it undergoes deformation.

[0018] In some embodiments, the sample fixing part includes:

[0019] The main body is connected to the connecting part;

[0020] A connector is detachably connected to the end of the main body that is away from the connecting portion, and the side of the connector opposite to the main body has the shear surface.

[0021] In some embodiments, the connecting portion and the sample fixing portion are integrally formed.

[0022] According to a second aspect of this disclosure, a shear performance testing apparatus is provided, including a drive module and a shear performance testing fixture as described in the first aspect.

[0023] The shear performance testing fixture is located at the output end of the drive module, and the drive module is used to drive the two opposite fixture bodies in the shear performance testing fixture to move relative to each other in a first direction.

[0024] In some embodiments, the shear performance testing apparatus further includes a control unit;

[0025] The control unit is electrically connected to the displacement sensor of the shear performance test fixture. The control unit is used to receive first detection data from the displacement sensor, the first detection data including the deformation of the shear specimen at fracture; and / or

[0026] The control unit is electrically connected to the load sensor of the shear performance testing fixture. The control unit is used to receive second detection data from the load sensor, the second detection data including the load experienced when the shear specimen breaks.

[0027] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: by setting multiple specimen fixing parts in the fixture body, each pair of opposite specimen fixing parts fixes a shear specimen, and at least some of the specimen fixing parts have different angles between the plane where the shear surface is located and the tensile direction, the shear performance of multiple shear specimens can be tested at multiple shear angles, reducing or avoiding the influence of other variables besides the shear angle on the test results, improving test accuracy, and increasing test efficiency.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0030] Figure 1 This is a schematic diagram of a jig body according to an exemplary embodiment.

[0031] Figure 2 This is a schematic diagram of a shear strength testing fixture according to an exemplary embodiment.

[0032] Figure 3 This is a schematic diagram of a jig body according to another exemplary embodiment.

[0033] Figure 4 This is a schematic diagram of a shear strength testing fixture according to another exemplary embodiment.

[0034] Figure 5 This is a schematic diagram of a jig body according to yet another exemplary embodiment.

[0035] Figure 6 This is a partial schematic diagram of a jig body according to an exemplary embodiment.

[0036] Figure 7 This is an exploded view of a sample fixing part according to an exemplary embodiment.

[0037] Figure 8 This is a schematic diagram of a shear performance testing apparatus according to an exemplary embodiment. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0039] Optically clear adhesive (OCA) is a colorless, transparent, and adhesive adhesive widely used in the field of electronic equipment technology to fix transparent optical components (such as lenses) in electronic devices.

[0040] Debonding and breakage of transparent optical adhesives can lead to the failure of electronic devices and affect the user experience. In related technologies, the mechanical property testing of transparent optical adhesives has a long cycle and the uncontrollable variables result in low test accuracy.

[0041] To address the problems existing in related technologies, this disclosure provides a shear performance testing fixture and apparatus. The shear performance testing fixture includes at least one fixture body, which includes a connecting portion and multiple sample fixing portions. The multiple fixing portions are disposed on the connecting portion. The end of each sample fixing portion away from the connecting portion has a shear surface. When two fixture bodies are used in conjunction, the shear surfaces of two opposing sample fixing portions are parallel to each other and define a receiving area. The receiving area is used to place a shear sample. At least some of the sample fixing portions have different test angles, which are the angles between the plane containing the shear surface and a first direction, where the first direction is the direction of relative movement between the two fixture bodies. In this disclosure, by providing multiple sample fixing portions in the fixture body, with each pair of opposing sample fixing portions fixing one shear sample, and at least some of the sample fixing portions having different angles between the plane containing the shear surface and the tensile direction, the shear performance of multiple shear samples can be tested at multiple shear angles. This reduces or avoids the influence of variables other than the shear angle on the test results, improves test accuracy, and enhances test efficiency.

[0042] According to an exemplary embodiment of this disclosure, such as Figure 1 As shown, this embodiment of the disclosure provides a shear performance testing fixture 100, which is used to perform failure testing on adhesive materials with shear performance. Adhesive materials with shear performance requirements include optically clear adhesive (OCA). Optically clear adhesive has the characteristics of being colorless and transparent (light transmittance greater than 95%), having high bonding strength, being able to cure at room temperature and shrinking in volume during curing. It is usually used to bond and connect transparent optical components (such as lenses and displays).

[0043] like Figure 1 As shown, the shear performance testing fixture 100 includes at least one fixture body 10. Figure 2 The diagram shows a setup with two fixture bodies 10. Figure 3 The diagram shows a setup with three fixture bodies 10. The number of fixture bodies 10 can be adjusted according to testing requirements. For example, if higher testing accuracy and reliability are required, the number of fixture bodies 10 can be increased.

[0044] See Figure 1 and Figure 2 Each fixture body 10 includes a connecting part 11 and multiple sample fixing parts 12. The multiple sample fixing parts 12 are disposed on the side of the connecting part 11. The sample fixing parts 12 are used to fix the shearing sample. The connecting part 11 connects the multiple sample fixing parts 12 into one unit. During the test, only the connecting part 11 needs to be subjected to force to simultaneously test the shearing performance of multiple shearing samples 200 fixed on the multiple sample fixing parts 12.

[0045] The shape of the connecting portion 11 and the arrangement of the plurality of sample fixing portions 12 are not limited in the embodiments disclosed herein. In one example, see [reference needed]. Figure 1 and Figure 5 In one example, the connecting portion 11 is elongated, and multiple sample fixing portions 12 are arranged along the extending direction of the connecting portion 11. In another example (not shown in the figures), the connecting portion is cuboid, and multiple sample fixing portions are arranged in an array along the length and height directions of the cuboid (rectangular array). In yet another example (not shown in the figures), the connecting portion is circular or annular, and multiple sample fixing portions are arranged along the circumferential and radial directions of the connecting portion.

[0046] See Figure 1 and Figure 2 The end of the sample fixing part 12 away from the connecting part 11 has a shearing surface 12a. The two fixture bodies 10 cooperate with each other in the assembled state. Multiple sample fixing parts 12, each located on one of the two fixture bodies 10, correspond one-to-one. The shearing surfaces 12a of two opposing sample fixing parts 12 are parallel to each other and define a receiving area. This receiving area is used to place the sheared sample 200. The two opposing surfaces of the sheared sample 200 are respectively connected to the two shearing surfaces 12a. The sheared sample 200 itself is adhesive, allowing it to be directly bonded to the shearing surfaces 12a of the sample fixing part 12.

[0047] See Figure 2 During the shear performance test, the two fixture bodies 10 used in conjunction are in the first direction ( Figure 2The relative motion in the x-direction (as shown in the diagram) applies shear force to the shear specimen 200 through tension, which facilitates testing of small-sized specimens, enables simulation of actual usage conditions, and reduces the cost of the shear specimen 200. Furthermore, during testing, since the connecting part 11 is fixedly connected to the specimen fixing part 12, the connecting part 11 and the specimen fixing part 12 can move at the same speed, avoiding inconsistencies in tensile rates that may occur during batch testing and improving test accuracy.

[0048] Continue reading Figure 2 At least part of the shear surface 12a of the sample fixing part 12 is located in the plane of the first direction ( Figure 2 The angles between the shear surfaces 12a and the first direction are different. When a tensile force is applied to the connecting part 11, the shear specimens 200 in the multiple accommodating spaces can be subjected to shear forces at different angles, thus enabling simultaneous multi-angle shear tests on multiple shear specimens 200. It should be noted that the angle between the shear surface 12a and the first direction can be any value between 0° and 90°. The angles between the shear surfaces 12a and the first direction of the multiple specimen fixing parts 12 can be different for each of them, or they can be partially different (that is, some shear surfaces 12a have the same angle with the first direction). When some shear surfaces 12a have the same angle with the first direction, for example, if there are two shear surfaces 12a with an angle of 45° with the first direction on the same fixture body 10, then two tests can be performed on the 45° shear angle. For example, the average of the two test results can be used as the test result to reduce or avoid errors.

[0049] In this embodiment of the invention, by providing multiple specimen fixing parts in the fixture body, with each pair of opposing specimen fixing parts fixing one shear specimen, and at least some of the specimen fixing parts having different angles between the shear plane and the tensile direction, the shear performance of multiple shear specimens can be tested at multiple shear angles. This reduces or avoids the influence of variables other than the shear angle on the test results, improving test accuracy and efficiency. These other variables include at least ambient temperature, humidity, and shear tensile rate.

[0050] In one exemplary embodiment, such as Figure 1 and Figure 2As shown, this embodiment of the present disclosure provides a shear performance testing fixture 100, which includes at least one fixture body 10. The fixture body 10 includes a connecting portion 11 and a plurality of sample fixing portions 12. The plurality of fixing portions are disposed on the connecting portion 11. The end of the sample fixing portion 12 away from the connecting portion 11 has a shear surface 12a. When the two fixture bodies 10 are used together, the shear surfaces 12a of the two opposing sample fixing portions 12 are parallel to each other and define a receiving area. The receiving area is used to place a shear sample 200. The plane containing the shear surface 12a of at least some of the sample fixing portions 12 has a different angle with a first direction. The first direction is the direction of relative movement of the two fixture bodies 10 used together.

[0051] In this embodiment, as Figure 1 and Figure 2 As shown, a sample fixing part 12 is provided on one side of the connecting part 11. During the shear test, the sides of the two connecting parts 11 with the sample fixing parts 12 are arranged facing each other. It can be understood that in the shear performance testing fixture 100 provided in this embodiment, the two fixture bodies 10 can have the same shape and structure. In the process of producing the fixture bodies 10, only one mold is needed to mass-produce fixture bodies 10 with the same shape and size. The production efficiency is high and the structural consistency of the fixture bodies 10 is high, which helps to ensure the yield rate. Furthermore, in the later maintenance of the testing fixture, for example, if one of the two paired fixture bodies 10 is damaged, the damaged one can be directly replaced with a brand new fixture body 10 with the same shape. The maintenance method is convenient and less prone to errors.

[0052] In some embodiments, such as Figure 3 and Figure 4 As shown, sample fixing parts 12 are provided on both sides of the connecting part 11 of the fixture body 10. This allows other fixture bodies 10 to be provided on both sides of the fixture body 10, meaning that three fixture bodies 10 can be used to test the shear performance of two sets of shear samples 200. (See reference...) Figure 3 and Figure 4The shear performance testing fixture 100 includes three fixture bodies 10, which are arranged sequentially along a direction perpendicular to the connecting portion 11. That is, the arrangement direction of the three fixture bodies 10 is parallel to the extension direction of the sample fixing portion 12 in each fixture body 10. In this arrangement direction, the fixture body 10 with sample fixing portions 12 on both sides (the first fixture body 10a) is located between the other two fixture bodies 10 (the second fixture bodies 10b). The second fixture bodies 10 only need to have multiple sample fixing portions 12 on one side. During the shear performance test, after placing the shear sample 200 in multiple accommodating areas between the first fixture body 10a and the two second fixture bodies 10b, the first fixture body 10a is fixed, and a tensile force is applied to the two second fixture bodies 10b to move them away from the first fixture body 10a. Figure 2 (as shown in the x-direction) is sufficient.

[0053] In one exemplary embodiment, such as Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a shear performance testing fixture 100, which includes at least one fixture body 10. The fixture body 10 includes a connecting portion 11 and a plurality of sample fixing portions 12. The plurality of fixing portions are disposed on the connecting portion 11. The end of the sample fixing portion 12 away from the connecting portion 11 has a shear surface 12a. When the two fixture bodies 10 are used together, the shear surfaces 12a of the two opposing sample fixing portions 12 are parallel to each other and define a receiving area. The receiving area is used to place a shear sample 200. The plane containing the shear surface 12a of at least some of the sample fixing portions 12 has a different angle with a first direction. The first direction is the direction of relative movement of the two fixture bodies 10 used together.

[0054] The shear performance testing fixture 100 provided in this embodiment may include various structures and devices provided in any of the above embodiments.

[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, a sample fixing part 12 is provided on one side of the connecting part 11 of part of the fixture body 10. Figure 3 and Figure 4 As shown, sample fixing parts 12 are provided on both sides of the connecting part 11 of part of the fixture body 10.

[0056] In this embodiment, as Figure 1 and Figure 2 As shown, the connecting part 11 is elongated, and multiple sample fixing parts 12 extend along the extension direction of the connecting part 11. Figure 2 The arrangement is shown in the y-direction.

[0057] In one example, see Figure 1 The connecting part 11 is elongated, and the plane containing the shear surfaces 12a of the multiple sample fixing parts 12 is parallel to the extension direction of the connecting part 11. During the shear test, the connecting part 11 can be placed horizontally (in any direction of the x and y planes), so that the shear surfaces 12a of the sample fixing parts 12 face upwards or downwards, so that the shear sample 200 can be placed on the shear surfaces 12a.

[0058] See another example. Figure 5 The connecting part 11 is elongated, and the plane containing the shear surface 12a of the multiple sample fixing parts 12 has different angles with the extension direction of the connecting part 11. During the shear test, the connecting part 11 can be placed vertically (in the z direction), so that the shear surface 12a of the sample fixing part 12 faces upward or downward, so that the shear sample 200 can be placed on the shear surface 12a.

[0059] Among them, see Figure 2 In the direction perpendicular to the shear plane 12a, the distance between any two opposite shear planes 12a is equal, and the distance between the shear planes 12a is equal to the initial thickness of the shear specimen 200 before it is stretched and sheared, thereby ensuring the consistency of clamping and improving the accuracy of the test results.

[0060] Among them, see Figures 1 to 5 Multiple specimen fixing parts 12 are disposed on the same side of the connecting part 11, and the distance between any two adjacent specimen fixing parts 12 is greater than or equal to 1 mm. When the shear specimen 200 breaks due to tension, the broken shear specimen 200 will generate stress waves, which will affect the nearby unbroken shear specimens 200. By setting the distance between two adjacent specimens to be greater than or equal to 1 mm, the stress waves on the micro-fractured shear specimens 200 can be reduced or avoided, thereby improving the test accuracy.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, a displacement sensor (not shown in the figure) is provided on the specimen fixing part 12. The displacement sensor is used to detect the deformation of the shear specimen 200. During the process of stretching and shearing the specimen 200 by the jig body 10, the load on the shear specimen 200 is the same as the load on the jig body 10. Therefore, a displacement sensor can be provided on each specimen fixing part 12 of the jig body 10. By detecting the load on the specimen fixing part 12, the load on the shear specimen 200 during shear deformation can be determined.

[0062] In some embodiments, a displacement sensor (not shown in the figures) is also provided on the sample fixing part 12, which is used to detect the deformation of the shear sample 200.

[0063] Among them, such as Figure 6 and Figure 7 As shown, the sample fixing part 12 includes a main body 121 and a connecting member 122. The main body 121 is connected to the connecting part 11. The connecting member 122 is disposed at the end of the main body 121 away from the connecting part 11 and forms a detachable connection with the main body 121. The side of the connecting member 122 away from the main body 121 has a shear surface 12a. In one example, see [reference needed]. Figure 6 and Figure 7 The connector 122 is slidably connected to the main body 121, forming an interference fit or a transition fit. In another example (not shown in the figures), the connector 122 and the main body 121 are detachably connected by fasteners such as screws. After the fixture body 10 or more uses, some adhesive that is difficult to remove may adhere to the shearing surface 12a. The adhesive may cause unevenness on the surface of the shearing surface 12a, thereby reducing the bonding reliability between the shearing specimen 200 and the shearing surface 12a and affecting the subsequent testing process. In this embodiment, the specimen fixing part 12 is composed of a detachably connected main body 121 and a connector 122. The connector 122, which is used to bond with the shearing specimen 200, is a low-cost replacement part. After a certain number of tests, a brand new connector 122 can be directly replaced to ensure bonding reliability.

[0064] Among them, such as Figure 1 The connecting part 11 and the sample fixing part 12 are integrally formed, and the integral forming method can be such as casting or 3D printing. The integral forming production process has the advantages of high production efficiency, high stability, uniform appearance, fewer manufacturing steps, high product precision, and good quality.

[0065] According to exemplary embodiments of the present disclosure, an embodiment of the present disclosure provides a shear performance testing device, which includes a drive module 300 and a shear performance testing fixture 100 provided in any of the above embodiments of the present disclosure. The shear performance testing fixture 100 is disposed at the output end of the drive module 300, and the drive module 300 is used to drive two opposing fixture bodies 10 of the shear performance testing fixture 100 in a first direction ( Figure 2 The relative motion is shown in the x-direction.

[0066] In one example, the shear performance of the shear specimen 200 can be tested by stretching. The stretching and shearing method is beneficial for testing small-sized specimens, which is convenient for simulating real-world scenarios (such as setting up adhesive materials in mobile phones) and reducing the cost of the shear specimen 200.

[0067] The shear performance testing apparatus provided in this embodiment has all the effects of the shear performance testing fixture 100. For example, the fixture body 10 is provided with multiple sample fixing parts 12, and the angle between the plane containing the shear surface 12a of at least some of the sample fixing parts 12 and the extension direction of the sample fixing part 12 is different. Shear samples 200 can be placed on the shear surfaces 12a of the multiple sample fixing parts 12 to test the shear performance of the shear samples 200 at multiple different shear angles at the same time. The only variable of the shear sample 200 is the shear angle, which reduces or avoids the influence of other variables on the test results, improves the test accuracy, and enhances the test efficiency.

[0068] In some embodiments, such as Figure 8 As shown, the shear performance testing device also includes a control unit (not shown in the figures). The control unit is electrically connected to the load sensor of the shear performance testing fixture 100. The control unit can receive the detection data from the load sensor and analyze the detection data to determine the shear performance of the shear specimen 200 at different angles. In one example, the load sensor data includes the load experienced by the shear specimen 200 when it breaks.

[0069] In other embodiments, such as Figure 8 As shown, the control unit is also electrically connected to the displacement sensor of the shear performance testing fixture 100. The control unit can receive the detection data from the displacement sensor, and by analyzing the detection data, the shear performance of the shear specimen 200 at different angles can be determined. In one example, the displacement sensor data includes the displacement of the shear specimen 200 when it breaks.

[0070] In some embodiments, such as Figure 8 As shown, the drive module 300 can be a power device such as an electric push rod or a cylinder that can directly output linear motion. The output shaft of the drive module 300 is connected to the side of the connecting part 11 where the sample fixing part 12 is not provided. The extension and retraction direction of the drive module 300 can be the same as the arrangement direction of the two fixture bodies 10 used in conjunction (e.g., Figure 8 (as shown in the x-direction) is parallel.

[0071] Among them, such as Figure 8 As shown, in the shear performance testing device, one fixture body 10 can be fixed while the other fixture body 10 is movable, thus requiring only one drive module 300. Both fixture bodies 10 can be movable structures, allowing for two drive modules 300 to simultaneously drive both fixture bodies 10. This does not limit the technical solution of this disclosure. For example, two connecting rods can be provided, linking the two fixture bodies 10 to the output end of the drive module 300.

[0072] In some embodiments, such as Figure 8As shown, the shearing device also includes a metal adapter 400, which is disposed between the connecting portion 11 of the fixture body 10 and the output shaft of the drive module 300. The metal adapter 400 can be snapped into the connecting portion 11, fastened, or otherwise connected. In one example, see [reference needed]. Figure 8 The metal adapter 400 has a set screw hole 401, in which a set screw (not shown in the figure) can be provided to abut against the side of the connecting part 11 away from the sample fixing part 12 to press the connecting part 11 and the metal adapter 400 together.

[0073] According to exemplary embodiments of this disclosure, this disclosure also provides a shear performance testing method, which can be performed using the shear performance testing fixture or shear performance testing device provided in the foregoing embodiments of this disclosure. The shear performance testing method may include the following steps:

[0074] Step S110: Obtain a shear sample.

[0075] In this step, a cutting machine can be used to cut a single sample to obtain multiple smaller, identical sheared samples with the same length, width, and height. Examples of cutting machines include laser cutters and plasma cutters.

[0076] Step S120: Fix the shear sample to the receiving area of ​​the two fixture bodies used together.

[0077] In this step, adhesive or the inherent adhesiveness of the shear specimen can be used to bond and fix the shear specimen to the shear surfaces of the specimen fixing parts of the two fixture bodies. The distance between the two shear surfaces is equal to the thickness of the shear specimen.

[0078] Step S130: Control the drive module to drive the two opposing fixture bodies to move relative to each other in the first direction.

[0079] In this step, the control drive module outputs linear motion to drive the two fixture bodies in the first direction ( Figure 8 The samples are moved away from and closer together in the x-direction (as shown in the diagram), resulting in multiple cycles of tensile shear testing. It is understandable that the multi-angle shear strength and fatigue shear strength tests of the shear samples (transparent optical adhesive) exhibit significant dispersion, requiring repeated stretching to obtain multiple sets of data.

[0080] Step S140: Obtain detection data from load sensors and / or displacement sensors, and summarize and analyze multiple detection data.

[0081] In this step, the test data can be used to calculate the average of multiple sets of data, perform data fitting, etc., and establish a mechanical curve based on the processed test data to obtain the stress and strain information of the shear specimen.

[0082] In one example, the test data also includes the deformation and load of the shear specimen at fracture, thus enabling the determination of the failure stress and failure strain for each shear specimen.

[0083] By testing the shear properties of shear specimens, the design of shear specimens can be optimized.

[0084] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0085] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A shear performance testing fixture, characterized in that, Includes at least one fixture body, said fixture body comprising: Connecting part; Multiple sample fixing parts are provided on the connecting part. The end of the sample fixing part away from the connecting part has a shearing surface. When the two fixture bodies used in the assembly state are in the same state, the shearing surfaces of the two opposing sample fixing parts are parallel to each other and define a receiving area. The receiving area is used to place the sheared sample. Wherein, at least some of the sample fixing parts correspond to different test angles, the test angle being the angle between the plane where the shear surface is located and the first direction, the first direction being the direction of relative movement of the two fixture bodies used in cooperation.

2. The shear performance testing fixture according to claim 1, characterized in that, The sample fixing part is provided on one side of the connecting part; and / or... The sample fixing part is provided on both sides of the connecting part.

3. The shear performance testing fixture according to claim 2, characterized in that, The shear performance testing fixture includes three fixture bodies, which are arranged sequentially along a direction perpendicular to the connecting portion. Along the arrangement direction, multiple sample fixing parts are provided on both sides of the fixture body located in the middle.

4. The shear performance testing fixture according to any one of claims 1-3, characterized in that, The connecting part is elongated, and multiple sample fixing parts are arranged along the extension direction of the connecting part.

5. The shear performance testing fixture according to claim 4, characterized in that, The distance between any two opposite shear planes is equal.

6. The shear performance testing fixture according to claim 4, characterized in that, The distance between two adjacent sample fixing parts located on the same side of the connecting part is greater than or equal to 1 mm.

7. The shear performance testing fixture according to claim 1, characterized in that, A displacement sensor is provided on the specimen fixing part, and the displacement sensor is used to detect the deformation of the shear specimen; and / or, A load sensor is provided on the specimen fixing part, and the load sensor is used to detect the load on the shear specimen when it undergoes deformation.

8. The shear performance testing fixture according to claim 1, characterized in that, The sample fixing part includes: The main body is connected to the connecting part; A connector is detachably connected to the end of the main body that is away from the connecting portion, and the side of the connector facing away from the main body has the shear surface.

9. The shear performance testing fixture according to claim 1 or 8, characterized in that, The connecting part and the sample fixing part are integrally formed.

10. A shear performance testing device, characterized in that, It includes a drive module and a shear performance testing fixture as described in any one of claims 1-9; The shear performance testing fixture is located at the output end of the drive module, and the drive module is used to drive the two opposite fixture bodies in the shear performance testing fixture to move relative to each other in a first direction.

11. The shear performance testing device according to claim 10, characterized in that, The shear performance testing device also includes a control unit; The control unit is electrically connected to the displacement sensor of the shear performance test fixture. The control unit is used to receive first detection data from the displacement sensor, the first detection data including the deformation of the shear specimen at fracture; and / or The control unit is electrically connected to the load sensor of the shear performance testing fixture. The control unit is used to receive second detection data from the load sensor, the second detection data including the load experienced when the shear specimen breaks.

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