Single shear device for testing shear strength of composite material rib and testing method

Abstract

The invention discloses a single shear device for testing shear strength of a composite material rib and a testing method, and belongs to the field of civil engineering. In the device, a lower blade assembly comprises a lower shearing blade and a lower blade clamp, the lower shearing blade is arranged on a tray, and the lower blade clamp is arranged above the lower shearing blade and is in butt joint with the lower shearing blade. The upper blade assembly and the lower blade assembly are arranged in a left-right matched mode so that a single shearing datum plane can be formed between the upper blade assembly and the lower blade assembly, and the upper blade assembly comprises an upper shearing blade and an upper blade clamp. And the upper blade clamp is arranged below the upper shearing blade and is butted with the upper shearing blade. The top of the upper shearing blade is provided with a shearing force application point located over the single shearing datum plane. According to the method, a single shear section can be formed on the composite material rib, and the actual shear strength of the composite material rib can be directly and reliably evaluated.

Description

Technical Field

[0001] This invention relates to the field of civil engineering, and more particularly to a single-shear device and testing method for testing the shear strength of composite reinforcement. Background Technology

[0002] In related technologies, the shear strength testing of composite reinforcement typically employs a double-shear device, which creates two shear sections on the composite reinforcement. However, in actual testing, factors such as the machining accuracy of the shear device and the placement of the composite reinforcement can lead to differences in the stress states of the two shear sections, sometimes making it difficult to form two complete shear sections. In such cases, averaging the contribution of each shear section to the shear strength may result in underestimating the test data and large dispersion, making it difficult to reliably assess the actual shear strength of the composite reinforcement. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related art. Therefore, one object of this invention is to provide a single-shear device for testing the shear strength of composite reinforcement, which can form a single shear section on the composite reinforcement, allowing for a reliable direct assessment of the actual shear strength of the composite reinforcement.

[0004] According to a first aspect of the present invention, a single shear device for testing the shear strength of composite material tendons includes: a tray, a sliding guide rail, a lower blade assembly, and an upper blade assembly; The sliding guide rails extend vertically and are arranged opposite to each other on the front and rear sides of the tray; The lower blade assembly includes a lower shearing blade and a lower blade clamp. The lower shearing blade is disposed on a tray, and the lower blade clamp is disposed above the lower shearing blade and engages with the lower shearing blade to clamp one end of the composite material rib. The upper blade assembly and the lower blade assembly are arranged in a left-right cooperation manner to form a single shearing reference plane between the upper blade assembly and the lower blade assembly. The upper blade assembly includes an upper shearing blade and an upper blade clamp. The upper shearing blade is movably mounted on the sliding guide rail. The upper blade clamp is located below the upper shearing blade and engages with the upper shearing blade to clamp the other end of the composite material rib. The top of the upper shearing blade has a shearing force application point located directly above the single shearing reference plane.

[0005] The single-shear device for testing the shear strength of composite rebar in this invention has the following advantages: First, it achieves strength assessment of a single shear section. Through the coordinated design of the tray, sliding guide rail, lower blade assembly, and upper blade assembly, the device forms a single shear section on the composite rebar during shearing. That is, the composite rebar has only one defined shear section, allowing for shear strength assessment. This solves the limitation of traditional double-shear testing devices requiring two complete shear surfaces on the composite rebar, avoiding test failures or invalid data due to uneven stress caused by the non-simultaneous failure of the two shear surfaces in traditional double-shear tests. Second, the measurement results are accurate. The shearing force application point is located directly above the single shear reference plane, effectively avoiding the generation of additional bending moments during shearing force application, resulting in a more ideal stress state and accurate measurement results. Simultaneously, the movement path of the upper blade assembly is strictly constrained by the sliding guide rail in the vertical direction of the single shear reference plane, preventing any lateral offset or rotation, thus ensuring the accuracy of the loading path of the upper blade assembly and making the single-shear device for testing the shear strength of composite rebar reliable.

[0006] In summary, the present invention has a simple structure, is easy to operate, and can form a single shear section on a single shear reference plane for composite material reinforcement, which can directly and reliably evaluate the actual shear strength of composite material reinforcement.

[0007] In some embodiments, the upper end of the upper shearing blade has an extension that extends laterally directly above the lower blade assembly, so that the upper shearing blade is L-shaped. The extension is movably mounted on the sliding guide rail, and the shearing force application point is located on the extension.

[0008] In some embodiments, the gap between the upper blade assembly and the lower blade assembly in the left-right direction is greater than 0 and less than or equal to 1 mm.

[0009] In some embodiments, the lower shearing blade has a first chamfer on its shearing edge and the upper shearing blade has a second chamfer on its shearing edge.

[0010] In some embodiments, there are two sliding guides, which are disposed opposite to each other on the front and rear sides of the tray, and the single shear reference plane is located between the two sliding guides.

[0011] In some embodiments, the lower blade assembly further includes a lower fastener that secures the lower blade clamp and the lower shearing blade; the upper blade assembly further includes an upper fastener that secures the upper blade clamp and the upper shearing blade.

[0012] In some embodiments, the mating surfaces of the lower blade clamp and the lower shearing blade are respectively provided with a first groove, and the first groove on the lower blade clamp and the first groove on the lower shearing blade are mated together to form a first channel to fix one end of the composite material rib; the mating surfaces of the upper blade clamp and the upper shearing blade are respectively provided with a second groove, and the second groove on the upper blade clamp and the second groove on the upper shearing blade are mated together to form a second channel to fix the other end of the composite material rib.

[0013] In some embodiments, the lower blade assembly further includes a first groove pad for placement in the first groove; and / or the upper blade assembly further includes a second groove pad for placement in the second groove.

[0014] In some embodiments, the thicknesses of the first grooved gasket and the second grooved gasket are selected according to the diameter of the composite material reinforcement.

[0015] The second objective of this invention is to provide a test method for testing the shear strength of composite material tendons. This method uses a single-shear device for testing the shear strength of composite material tendons according to the first aspect of this invention, and includes the following steps: One end of the composite material rib is clamped between the lower shear blade and the lower blade clamp; The upper blade assembly is fitted onto the sliding guide rail via the upper shearing blade, and the other end of the composite material rib is clamped between the upper shearing blade and the upper blade clamp. Pressure is applied at the shearing force application point at the top of the upper shearing blade, causing the upper blade assembly to move downward along the sliding guide until the composite material reinforcement is sheared and broken. The maximum shear force is recorded to calculate the shear strength.

[0016] Since the method for testing the shear strength of composite material tendons in the second aspect embodiment of the present invention utilizes the single shear device for testing the shear strength of composite material tendons in the first aspect embodiment of the present invention, the method for testing the shear strength of composite material tendons in the second aspect embodiment of the present invention has essentially the same technical effects as the single shear device for testing the shear strength of composite material tendons in the first aspect embodiment of the present invention, and will not be described again here.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a single shear device for testing the shear strength of composite material tendons according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper blade assembly according to an embodiment of the present invention; Figure 3 This is a left view of a single-shear device for testing the shear strength of composite material tendons according to an embodiment of the present invention.

[0019] Figure Labels A single shear device 1000 for testing the shear strength of composite reinforcement; a tray 1; a sliding guide rail 2; a lower blade assembly 3; a lower shearing blade 301; a lower blade clamp 302; a lower fastener 303; a first groove gasket 304; a first groove 305; an upper blade assembly 4; an upper blade clamp 401; an upper shearing blade 402; an extension 4021; an upper fastener 403; a second groove gasket 404; a second groove 405; and a composite reinforcement 5. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is combined with Figures 1 to 3 This invention describes a single shear device 1000 for testing the shear strength of composite material tendons, according to an embodiment of the present invention.

[0022] like Figure 1 and Figure 3 As shown, the single shear device 1000 for testing the shear strength of composite material tendons according to an embodiment of the present invention includes a tray 1, a sliding guide rail 2, a lower blade assembly 3, and an upper blade assembly 4.

[0023] The tray 1 is used to support the entire single shear device 1000 used for testing the shear strength of composite material tendons, providing a stable reference platform for the test.

[0024] The lower blade assembly 3 is fixed on the tray 1 as a reference. Specifically, the lower blade assembly 3 includes a lower shearing blade 301 and a lower blade clamp 302. The lower shearing blade 301 is set on the tray 1, and the lower blade clamp 302 is set above the lower shearing blade 301 and engages with the lower shearing blade 301 to clamp one end of the composite material rib 5. For example, the lower blade clamp 302 and the lower shearing blade 301 are locked on the tray 1 by a lower fastener 303 such as a bolt, thereby achieving that one end of the composite material rib 5 is clamped between the lower shearing blade 301 and the lower blade clamp 302. The fixation is reliable and can prevent the composite material rib 5 from shifting during the shearing process. This is beneficial for cutting a single shear section on the composite material rib 5, and thus is beneficial for reliably evaluating the actual shear strength of the composite material rib 5.

[0025] The upper blade assembly 4, as a movable component, is mounted on the sliding guide rail 2, allowing it to move vertically. Specifically, the upper blade assembly 4 and the lower blade assembly 3 are arranged in a left-right cooperation configuration to form a single shear reference plane between them. This single shear reference plane is located at the gap between the upper blade assembly 4 and the lower blade assembly 3 in the left-right direction, so that the composite material reinforcement 5 generates a single shear section at the single shear reference plane. The upper blade assembly 4 includes an upper shear blade 402 and an upper blade clamp 401. The upper shear blade 402 is mounted on the sliding guide rail 2, allowing it to move vertically. This effectively guides the upper blade assembly 4 downward in the shearing direction, strictly constraining its movement path to the vertical direction of the single shear reference plane, preventing any lateral offset or rotation. This ensures the accuracy of the shearing direction, making the single shear section generated on the composite material reinforcement 5 coincide with the single shear reference plane, thus improving the reliability of the test. The upper blade clamp 401 is positioned below and engages with the upper shear blade 402 to clamp the other end of the composite material rib 5. For example, the upper blade clamp 401 is locked onto the upper shear blade 402 by an upper fastener 403 such as a bolt, thereby securing the other end of the composite material rib 5 between the upper shear blade 402 and the upper blade clamp 401. This secures the rib 5 reliably and prevents it from shifting during shearing. It is also beneficial to cut a single shear section on the composite material rib 5, which in turn facilitates a reliable assessment of the actual shear strength of the composite material rib 5. The top of the upper shear blade 402 has a shearing force application point located directly above the single shear reference plane, that is, the shearing force application point is located directly above the gap between the upper blade assembly 4 and the lower blade assembly 3 in the left-right direction. If the shearing force application point is not aligned with the single shear reference plane, an additional bending moment will be generated, causing the composite material reinforcement 5 to bear bending load while bearing shear force, thereby causing the measured shear strength value to deviate from the true value and affecting the accuracy of the test. Therefore, applying pressure at the shearing force application point directly above the single shear reference plane ensures that the load is transferred to the single shear reference plane in the form of shear, effectively eliminating the influence of bending moment, making the test conditions more ideal, and the measurement results more accurate.

[0026] In this embodiment of the invention, the single shear device 1000 for testing the shear strength of composite material tendons performs single shearing on the composite material tendon 5. One end of the composite material tendon 5 is clamped by the lower shearing blade 301 and the lower blade clamp 302 of the lower blade assembly 3, and the other end of the composite material tendon 5 is clamped by the upper shearing blade 402 and the upper blade clamp 401 of the upper blade assembly 4. Pressure is applied at the shearing force application point at the top of the upper shearing blade 402, causing the upper blade assembly 4 to move downward along the sliding guide rail 2 until the composite material tendon 5 is sheared and a single shear section is generated on the composite material tendon 5. The maximum shear force is recorded for calculating the shear strength.

[0027] The single-shear device 1000 for testing the shear strength of composite reinforcement in this invention has the following advantages: First, it achieves strength evaluation of a single shear section. Through the coordinated design of the tray 1, sliding guide rail 2, lower blade assembly 3, and upper blade assembly 4, the device forms a single shear section on the composite reinforcement 5 during shearing. That is, the composite reinforcement 5 has only one defined shear section, which allows for shear strength evaluation. This solves the limitation of traditional double-shear testing devices requiring two complete shear surfaces on the composite reinforcement 5, avoiding test failures or invalid data due to uneven stress caused by the two shear surfaces not breaking simultaneously in traditional double-shear tests. Second, the measurement results are accurate. The shearing force application point is located directly above the single shear reference plane, effectively avoiding the generation of additional bending moments during shearing force application, making the stress state of the test condition more ideal and the measurement results accurate. Meanwhile, the moving path of the upper blade assembly 4 is strictly constrained by the sliding guide rail 2 in the vertical direction of the single shear reference plane to prevent any lateral offset or rotation, thereby ensuring the accuracy of the loading path of the upper blade assembly 4 and making the single shear device 1000 for testing the shear strength of composite material tendons reliable.

[0028] In summary, the present invention has a simple structure, is easy to operate, and can form a single shear section on a single shear reference plane, which can directly and reliably evaluate the actual shear strength of the composite material reinforcement 5.

[0029] In some embodiments, the upper shear blade 402 has an extension 4021 extending laterally directly above the downward blade assembly 3 at its upper end, making the upper shear blade 402 L-shaped. The extension 4021 is movably mounted on the sliding guide rail 2, and the shearing force application point is located on the extension 4021. The L-shaped upper shear blade 402 design means that the upper blade assembly 4 is also L-shaped as a whole, ensuring that the force applied by the external testing machine is located directly above the single shear reference plane, ensuring that the load is transferred to the shear section in the form of shearing, effectively eliminating the influence of bending moment, making the test conditions more ideal, and the measurement results more accurate.

[0030] In some embodiments, the shearing edge of the lower shearing blade 301 is provided with a first chamfer, and the shearing edge of the upper shearing blade 402 is provided with a second chamfer. The first and second chamfers can eliminate the risk of stress concentration during the shearing process.

[0031] In some embodiments, the gap between the upper blade assembly 4 and the lower blade assembly 3 in the left-right direction is greater than 0 and less than or equal to 1 mm. This gap needs to be determined in actual manufacturing to ensure that the upper blade assembly 4 and the lower blade assembly 3 do not collide, while the distance should not be too large, usually within 1 mm to meet the testing requirements.

[0032] In some embodiments, there are two sliding guide rails 2, which are arranged opposite each other on the front and rear sides of the tray 1, with a single shear reference plane located between the two sliding guide rails 2. The two sliding guide rails 2 ensure greater stability of the upper blade assembly 4 during movement, preventing deviation. The single shear reference plane being located between the two sliding guide rails 2 ensures that the movement trajectory of the upper blade assembly 4 is strictly aligned with the single shear reference plane, preventing additional bending moments and increasing the reliability of test results.

[0033] In some embodiments, the lower blade assembly 3 further includes a lower fastener 303, which fastens the lower blade clamp 302 and the lower shearing blade 301 to clamp one end of the composite material rib 5; the upper blade assembly 4 further includes an upper fastener 403, which fastens the upper blade clamp 401 and the upper shearing blade 402 to clamp the other end of the composite material rib 5.

[0034] In some embodiments, both the lower fastener 303 and the upper fastener 403 are bolts, which are easy to operate.

[0035] In some embodiments, the mating surfaces of the lower blade clamp 302 and the lower shear blade 301 are respectively provided with a first groove 305. The first groove 305 on the lower blade clamp 302 and the first groove 305 on the lower shear blade 301 mate to form a first channel to fix one end of the composite material rib 5. The mating surfaces of the upper blade clamp 401 and the upper shear blade 402 are respectively provided with a second groove 405. The second groove 405 on the upper blade clamp 401 and the second groove 405 on the upper shear blade 402 mate to form a second channel to fix the other end of the composite material rib 5. By providing the first groove 305 and the second groove 405, it is easier to place the composite material rib 5 and it can also prevent the composite material rib 5 from slipping and rotating during the test, thus affecting the accuracy of the test results.

[0036] In some embodiments, the first groove 305 and the second groove 405 are semi-circular. Due to manufacturing process limitations, the cross-section of the composite material rib 5 is mostly circular. Setting the first groove 305 and the second groove 405 as semi-circular can avoid the influence of stress concentration on the test results during shearing. In addition, the contact area between the composite material rib 5 and the semi-circular groove is large, the static friction is increased, and the composite material rib 5 is prevented from sliding in the groove.

[0037] In some embodiments, the lower blade assembly 3 further includes a first grooved pad 304, which is placed in a first groove 305; and / or the upper blade assembly 4 further includes a second grooved pad 404, which is placed in a second groove 405. By adapting the first grooved pad 304 in the first groove 305 and the second grooved pad 404 in the second groove 405, the effective clamping space can be adjusted more conveniently to accommodate the composite material rib 5 with the corresponding diameter, while preventing the composite material rib 5 from slipping or rotating during testing.

[0038] In some embodiments, the thickness of the first groove shim 304 and the second groove shim 404 is selected according to the diameter of the composite material rib 5. By fitting the first groove shim 304 in the first groove 305 and the second groove shim 404 in the second groove 405, the effective clamping space can be adjusted more easily to accommodate composite material ribs of corresponding diameters, while preventing slippage or rotation of the composite material rib 5 during testing. Since the diameter of the composite material rib 5 varies, it would increase costs and reduce testing efficiency if a set of lower blade assembly 3 and upper blade assembly 4 were specially machined for each diameter of the composite material rib 5 to perfectly match the first groove 305 and the second groove 405. For example, for composite material ribs with smaller diameters, thicker first groove shims 304 and second groove shims 404 can be used to fill the gaps to ensure secure clamping. This achieves broad adaptability to specimens of various sizes, improving the versatility and economy of the single-shear device 1000 used for testing the shear strength of composite material ribs.

[0039] A second aspect of the present invention provides a test method for testing the shear strength of composite material reinforcement 5. This method uses the single-shear device 1000 for testing the shear strength of composite material reinforcement according to the first aspect of the present invention, and includes the following steps: One end of the composite material rib 5 is clamped between the lower shear blade 301 and the lower blade clamp 302.

[0040] The upper blade assembly 4 is fitted onto the sliding guide rail 2 via the upper shearing blade 402, and the other end of the composite material rib 5 is clamped between the upper shearing blade 402 and the upper blade clamp 401.

[0041] Pressure is applied at the shearing point at the top of the upper shearing blade 402, causing the upper blade assembly 4 to move downward along the sliding guide rail 2 until the composite material rib 5 is sheared and broken. The maximum shear force is recorded to calculate the shear strength.

[0042] Since the test method for the shear strength of composite reinforcement 5 in the second aspect embodiment of the present invention utilizes the single shear device 1000 for testing the shear strength of composite reinforcement in the first aspect embodiment of the present invention, the test method for testing the shear strength of composite reinforcement 5 in the second aspect embodiment of the present invention has essentially the same technical effects as the single shear device 1000 for testing the shear strength of composite reinforcement in the first aspect embodiment of the present invention, and will not be described again here.

[0043] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A single shear device for composite tensile shear strength testing, characterized by, include: tray; A sliding guide rail extends vertically and is disposed opposite to each other on the front and rear sides of the tray; The lower blade assembly includes a lower shearing blade and a lower blade clamp. The lower shearing blade is disposed on a tray, and the lower blade clamp is disposed above the lower shearing blade and engages with the lower shearing blade to clamp one end of the composite material rib. An upper blade assembly is arranged in a left-right cooperation with the lower blade assembly to form a single shearing reference plane between the upper blade assembly and the lower blade assembly. The upper blade assembly includes an upper shearing blade and an upper blade clamp. The upper shearing blade is movably mounted on the sliding guide rail. The upper blade clamp is located below the upper shearing blade and engages with the upper shearing blade to clamp the other end of the composite material rib. The top of the upper shearing blade has a shearing force application point located directly above the single shearing reference plane.

2. The single shear device for composite tensile shear strength testing of claim 1, wherein, The upper end of the upper shearing blade has an extension that extends laterally directly above the lower blade assembly, so that the upper shearing blade is L-shaped. The extension is movably mounted on the sliding guide rail, and the shearing force application point is located on the extension.

3. The single-shear device for testing the shear strength of composite material reinforcement according to claim 1, characterized in that, The gap between the upper blade assembly and the lower blade assembly in the left-right direction is greater than 0 and less than or equal to 1 mm.

4. The single-shear device for testing the shear strength of composite material reinforcement according to claim 1, characterized in that, The lower shearing blade has a first chamfer on its shearing edge, and the upper shearing blade has a second chamfer on its shearing edge.

5. The single-shear device for testing the shear strength of composite material tendons according to claim 1, characterized in that, There are two sliding guide rails, which are arranged opposite to each other on the front and rear sides of the tray, and the single shear reference plane is located between the two sliding guide rails.

6. The single-shear device for testing the shear strength of composite material tendons according to claim 1, characterized in that, The lower blade assembly further includes a lower fastener that secures the lower blade clamp and the lower shearing blade; the upper blade assembly further includes an upper fastener that secures the upper blade clamp and the upper shearing blade.

7. The single-shear device for testing the shear strength of composite material tendons according to claim 1, characterized in that, The lower blade clamp and the lower shearing blade are respectively provided with a first groove on their mating surfaces. The first groove on the lower blade clamp and the first groove on the lower shearing blade are mated together to form a first channel to fix one end of the composite material rib. The upper blade clamp and the upper shearing blade are respectively provided with a second groove on their mating surfaces. The second groove on the upper blade clamp and the second groove on the upper shearing blade are mated together to form a second channel to fix the other end of the composite material rib.

8. The single-shear device for testing the shear strength of composite material reinforcement according to claim 7, characterized in that, The lower blade assembly further includes a first groove pad for placement in the first groove; and / or the upper blade assembly further includes a second groove pad for placement in the second groove.

9. The single-shear device for testing the shear strength of composite material reinforcement according to claim 8, characterized in that, The thickness of the first grooved gasket and the second grooved gasket are selected according to the diameter of the composite material reinforcement.

10. A test method for testing the shear strength of composite material reinforcement, characterized in that, The test is performed using the single-shear device for testing the shear strength of composite material reinforcement as described in any one of claims 1-9, comprising the following steps: One end of the composite material rib is clamped between the lower shear blade and the lower blade clamp; The upper blade assembly is fitted onto the sliding guide rail via the upper shearing blade, and the other end of the composite material rib is clamped between the upper shearing blade and the upper blade clamp. Pressure is applied at the shearing force application point at the top of the upper shearing blade, causing the upper blade assembly to move downward along the sliding guide until the composite material reinforcement is sheared and broken. The maximum shear force is recorded to calculate the shear strength.

Images