Composite material shear test clamp and method for enhancing rigidity through linkage sliding rails

Abstract

The invention discloses a composite material shear test fixture for enhancing rigidity through linkage of slide rails. The composite material shear test fixture comprises a first slide rail, a second slide rail, a first clamping assembly and a second clamping assembly, the first sliding rail and the second sliding rail are parallel up and down and are horizontally arranged; the upper end of the first clamping assembly is in sliding connection with the first sliding rail, and the lower end of the first clamping assembly is connected with the second sliding rail. The lower end of the second clamping assembly is in sliding connection with the second sliding rail, and the upper end of the second clamping assembly is connected with the first sliding rail. One side of the test sample is fixed with the inner side of the first clamping component, and the other side of the test sample is fixed with the side part of the second clamping component. The invention also discloses a composite material shear test method. The shear test fixture has the beneficial effects that the first slide rail and the second slide rail are additionally arranged and are respectively connected through the corresponding clamping assemblies to form a rigid closed loop, so that the horizontal rigidity of the whole shear test fixture is enhanced, a test sample is prevented from twisting in the shear test process, and the test accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material testing, and in particular to a composite material shear testing fixture and method with a linked slide rail for enhanced rigidity. Background Art

[0002] In the field of mechanical properties testing of composite laminates, the V-notch specimens specified in relevant standards (such as Figure 1 The in-plane shear test (shown in Figure 1) is widely used. The basic principle of this test is to clamp the left and right sides of the specimen with a fixture and apply loads in opposite directions. This results in a resultant force at a 45-degree angle to the material at the notch of the specimen, thereby obtaining in-plane shear strength data.

[0003] Currently, most existing V-notch in-plane shear test fixtures for composite laminates are of a separate structure, that is, a pair of fixtures are used to clamp the two sides of the specimen respectively, and the horizontal direction limit is achieved by relying on the rigidity of the main shaft of the testing machine. However, in actual tests, the main shaft of the testing machine is not absolutely rigid, and twisting is inevitable during the load application process. This twisting will interfere with the testing process, causing deviations in the test results and affecting the accuracy of the test. In addition, the existing test fixtures are completely separate and rely on tightening multiple sets of bolts to apply the clamping force. When installing and disassembling the specimen, multiple sets of bolts need to be repeatedly operated, which reduces the efficiency of assembly and disassembly. Summary of the Invention

[0004] The object of the present invention is to provide a composite material shear test fixture and method with a linked slide rail to enhance rigidity, in order to improve the accuracy of the test.

[0005] The technical solution adopted by the present invention is: a composite material shear test fixture with a linked slide rail to enhance rigidity, comprising a first slide rail, a second slide rail, a first clamping assembly and a second clamping assembly; The first slide rail and the second slide rail are vertically parallel and horizontally arranged; An upper interface is provided on the top of the first slide rail; The upper end of the first clamping assembly is slidably connected to the first slide rail, and the lower end of the first clamping assembly is connected to the second slide rail; One side of the first clamping component is concave to form a clamping space A; A lower interface is provided at the bottom of the second slide rail; The lower end of the second clamping assembly is slidably connected to the second slide rail, and the upper end of the second clamping assembly is connected to the first slide rail; One side of the second clamping assembly is concave to form a clamping space B, and the clamping space B and the clamping space A are combined to form a clamping cavity; The test sample is horizontally arranged in the clamping cavity; one side of the test sample is fixed to the inner side of the first clamping component, and the other side of the test sample is fixed to the side of the second clamping component.

[0006] According to the above solution, the first clamping assembly includes a first base and a first clamping block; A first slider is fixed to the upper end of the first base, and the first slider is adapted to the first slide rail; Two first clamping blocks arranged front and back are installed on the inner side of the first base, and one side of the test sample is arranged between the two first clamping blocks; the first clamping block is connected to a first driving member arranged in the first base.

[0007] According to the above scheme, a first annular cavity is provided in the first base, and a first limiting column is formed in the center of the first annular cavity for limiting the end of the test sample; the first driving member is an annular movable member, which is sleeved on the first limiting column, and the first driving member is located in the first annular cavity, and a first oil cavity is formed between the rear end of the first driving member and the first annular cavity, and an oil inlet and an oil outlet connected to the first oil cavity are provided on the first base; a first wedge-shaped groove is provided on the inner side of the front end of the first driving member; the two first clamping blocks are both wedge-shaped blocks, which are provided with an inclined surface that cooperates with the first wedge groove, and the two are installed in the first wedge groove.

[0008] According to the above solution, a first end plate connected to the first base is provided on the outer periphery of the first driving member, and the first end plate is connected to the first base with bolts.

[0009] According to the above solution, a vertical first guide rod is further provided at the bottom of the first base; the first guide rod is adapted to the first guide hole on the first guide slider; and the first guide slider is installed on the second slide rail.

[0010] According to the above solution, the second clamping assembly includes a second base and two second clamping blocks; A second slider is provided at the lower end of the second base, and the second slider is adapted to the second slide rail; Second clamping blocks arranged front and back are installed on the inner side of the second base, and the other side of the test sample is arranged between the two second clamping blocks; the second clamping block is connected to a second driving member arranged in the second base.

[0011] According to the above solution, a second annular cavity is provided in the second base, and a second limiting post is formed in the center of the second annular cavity for limiting the end of the test sample; the second driving member is an annular moving member, which is sleeved on the second limiting post and is located in the second annular cavity. A second oil cavity is formed between the rear end of the second driving member and the second annular cavity, and an oil inlet and an oil outlet communicating with the second oil cavity are formed on the second base; A second wedge-shaped groove is formed on the inner side of the front end of the second driving member; The two second clamping blocks are both wedge-shaped blocks, provided with inclined surfaces that match the second wedge-shaped grooves, and the two are installed in the second wedge-shaped grooves.

[0012] According to the above solution, a second end plate connected to the second base is provided on the outer periphery of the second driving member, and the second end plate is connected to the second base with bolts.

[0013] According to the above solution, a second vertical guide rod is further provided on the top of the second base; the second guide rod is adapted to the second guide hole on the second guide slider; and the second guide slider is installed on the first slide rail.

[0014] The present invention also adopts a composite material shear test method, which is: Prepare test samples of the composite materials to be tested; Providing a composite shear test fixture as described above; Connecting the upper and lower interfaces of the composite material shear test fixture to corresponding test equipment respectively; Push the two clamping assemblies horizontally in opposite directions, and the bases of the two clamping assemblies move in opposite directions along the first slide rail and the second slide rail respectively, leaving space for installing the test specimen; Place one side of the test sample between the two first clamping blocks of the first clamping assembly and align it with the edge of the first base; drain the hydraulic oil in the first oil chamber, and then move the first driving member in the first annular chamber away from the first clamping block, so that the two first clamping blocks approach each other and clamp the test sample; Push the second base of the second clamping assembly horizontally toward the first clamping assembly, so that the other side of the test sample is located between the two second clamping blocks of the second clamping assembly and is in contact with the edge of the second base. Drain the hydraulic oil in the second oil chamber. At this time, the second driving member moves in the second annular chamber away from the second clamping block, so that the two second clamping blocks are close to each other and clamp the test sample. Set test parameters according to test requirements; Start the test equipment, keep the second base fixed, move the first base vertically upward, and shear the test sample; monitor the test equipment in real time during the shearing process, and collect data such as load, displacement, and strain to observe the deformation and failure process of the test sample 4. Stop the test after the test is completed.

[0015] The beneficial effects of the present invention are: 1. The present invention adds a first slide rail and a second slide rail arranged in parallel in the horizontal direction, which are connected through corresponding clamping components to form a rigid closed loop. The force exerted on the clamping components on both sides is efficiently transmitted and evenly distributed, so that the entire system can jointly withstand external forces, thereby enhancing the horizontal rigidity of the entire shear test fixture, avoiding twisting of the V-notch specimen during the shear test, and improving the force transmission stability and test data accuracy during the test.

[0016] 2. The present invention designs two sets of clamping assemblies, which are respectively arranged on both sides of the test sample; and the clamping blocks of the clamping assemblies are hydraulically driven, which can realize the rapid disassembly and assembly of the test sample, thereby improving the test efficiency.

[0017] 3. The guide rod and guide slider designed in the present invention can improve the stability of the clamping assembly in the vertical movement and ensure the accuracy of the test.

[0018] 4. The present invention has a simple structure and strong adaptability, is suitable for standardized testing of shear properties of various composite materials, and has good engineering application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a specific embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the first clamping assembly in this embodiment.

[0021] Figure 3 Schematic diagram of the connection between the first base, the first clamping block and the first driving member in this embodiment.

[0022] Figure 4 for Figure 3 Internal schematic diagram.

[0023] In the figure: 1. upper interface; 2. first base; 3. second clamping block; 4. test sample; 5. second base; 6. lower interface; 7. first slide rail; 8. second slide rail; 9. first slider; 10. second slider; 11. first guide rod; 12. first guide slider; 13. second guide slider; 14. second guide rod; 15. first clamping block; 16. first driving member; 17. first oil chamber; 18. first limiting column; 19. first end plate; 20. first wedge groove. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0025] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present 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 operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0027] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. In addition, the term "plurality" means including two or more.

[0029] like Figure 1 and Figure 2 A composite material shear test fixture with a linked slide rail and enhanced rigidity is shown, comprising a first slide rail 7, a second slide rail 8, a first clamping assembly, and a second clamping assembly; The first slide rail 7 and the second slide rail 8 are vertically parallel and horizontally arranged; The top of the first slide rail 7 is provided with an upper interface 1 for connecting to a test device; The upper end of the first clamping assembly is slidably connected to the first slide rail 7, and the lower end of the first clamping assembly is connected to the second slide rail 8. The first clamping assembly can slide horizontally along the first slide rail 7 and the second slide rail 8, and the first clamping assembly can move vertically relative to the second slide rail 8; One side of the first clamping component is concave to form a clamping space A; The bottom of the second slide rail 8 is provided with a lower interface 6 for connecting to a test device; The lower end of the second clamping assembly is slidably connected to the second slide rail 8, and the upper end of the second clamping assembly is connected to the first slide rail 7; the second clamping assembly can slide horizontally along the first slide rail 7 and the second slide rail 8, and the second clamping assembly can move vertically relative to the first slide rail 7; One side of the second clamping assembly is concave to form a clamping space B, and the clamping space B and the clamping space A are combined to form a clamping cavity; The test sample 4 is horizontally arranged in the clamping cavity, with one side of the test sample 4 fixed to the inner side of the first clamping component, and the other side of the test sample 4 fixed to the side of the second clamping component.

[0030] In the present invention, the test equipment is connected to the second clamping assembly, and the second clamping assembly does not undergo vertical displacement. The test equipment is connected to the first clamping assembly, driving the first clamping assembly to move vertically upward to shear the test sample 4.

[0031] Preferably, the first clamping assembly includes a first base 2 and a first clamping block 15; A first slider 9 is fixed to the upper end of the first base 2 , and the first slider 9 is adapted to the first slide rail 7 ; Two first clamping blocks 15 arranged front to back are installed on the inner side of the first base 2 , and one side of the test sample 4 is located between the two first clamping blocks 15 ; the first clamping block 15 is connected to a first driving member 16 provided in the first base 2 .

[0032] In the present invention, the inner side of the first base 2 is concave, and two first clamping blocks 15 are installed in the formed clamping space A. The first driving member 16 can drive the two first clamping blocks 15 to move closer to each other to clamp the test sample 4, or move away from each other to loosen the test sample 4.

[0033] Preferably, if Figure 3 and 4 As shown, a first annular cavity is provided in the first base 2, and a first limiting post 18 is formed at the center of the first annular cavity for limiting the end of the test sample 4; the first driving member 16 is an annular moving member, which is sleeved on the first limiting post 18 and is located in the first annular cavity. A first oil cavity 17 is formed between the rear end of the first driving member 16 (the end away from the first clamping block 15) and the first annular cavity. The first base 2 is provided with an oil inlet and an oil outlet connected to the first oil cavity 17; A first wedge-shaped groove 20 is formed at the front end of the first driving member 16 (i.e., the end close to the first clamping block 15); The two first clamping blocks 15 are both wedge-shaped blocks, each having an inclined surface that matches the first wedge-shaped groove 20 , and the two first clamping blocks 15 are installed in the first wedge-shaped groove 20 .

[0034] In the present invention, when oil flows out of the first oil chamber 17, the first driving member 16 moves in the first annular chamber in a direction away from the first clamping block 15. At this time, the inclined surface of the first clamping block 15 and the groove surface of the first wedge-shaped groove 20 are gradually pressed together, and the two first clamping blocks 15 are squeezed together to clamp the test sample 4. When oil flows into the first oil chamber 17, the hydraulic oil in the first oil chamber 17 drives the first driving member to move in the first annular chamber toward the first clamping block 15. At this time, the inclined surface of the first clamping block 15 and the groove surface of the first wedge-shaped groove 20 are relaxed and not pressed, and the two first clamping blocks 15 move away from each other to relax the test sample 4.

[0035] In the present invention, two first clamping blocks 15 are provided at the ends of the first limiting column 18 ; a first end plate 19 connected to the first base 2 is provided on the outer periphery of the first driving member 16 , and the first end plate 19 is bolted to the first base 2 .

[0036] Preferably, a vertical first guide rod 11 is further provided at the bottom of the first base 2 ; the first guide rod 11 is adapted to a first guide hole on a first guide slider 12 ; and the first guide slider 12 is mounted on the second slide rail 8 .

[0037] In the present invention, the first guide hole is a vertical hole, and the first guide rod 11 moves vertically along the first guide hole; and the first guide slider 12 can drive the first guide rod 11 to move horizontally along the second slide rail 8. The vertical movement of the first guide rod 11 and the horizontal movement of the first guide slider 12 do not interfere with each other.

[0038] In the present invention, the configuration of the second clamping assembly is the same as that of the first clamping assembly. Specifically, the second clamping assembly includes a second base 5 and two second clamping blocks 3; A second slider 10 is provided at the lower end of the second base 5 , and the second slider 10 is adapted to the second slide rail 8 ; Second clamping blocks 3 arranged front and back are installed on the inner side of the second base 5 , and the other side of the test sample 4 is arranged between the two second clamping blocks 3 ; the second clamping block 3 is connected to a second driving member arranged in the second base 5 .

[0039] In the present invention, the inner side of the second base 5 is concave inward, and the formed clamping space B is installed with two second clamping blocks 3. The second driving member can drive the two second clamping blocks 3 to move closer to each other to clamp the test sample 4, or move away from each other to loosen the test sample 4.

[0040] Preferably, a second annular cavity is provided in the second base 5, and a second limiting post is formed at the center of the second annular cavity for limiting the end of the test sample 4; the second driving member is an annular moving member, which is sleeved on the second limiting post and is located in the second annular cavity. A second oil cavity is formed between the rear end of the second driving member (the end away from the second clamping block 3) and the second annular cavity, and an oil inlet and an oil outlet communicating with the second oil cavity are provided on the second base 5; A second wedge-shaped groove is formed on the inner side of the front end of the second driving member (i.e., the end close to the second clamping block 3); The two second clamping blocks 3 are both wedge-shaped blocks, provided with inclined surfaces that match the second wedge-shaped grooves, and the two are installed in the second wedge-shaped grooves.

[0041] In the present invention, when oil flows out of the second oil chamber, the second driving member moves in the second annular chamber in a direction away from the second clamping block 3. At this time, the inclined surface of the second clamping block 3 and the groove surface of the second wedge-shaped groove are gradually pressed together, and the two second clamping blocks 3 are squeezed together to clamp the test sample 4. When oil flows into the second oil chamber, the hydraulic oil in the second oil chamber drives the second driving member to move in the second annular cavity toward the second clamping block 3. At this time, the inclined surface of the second clamping block 3 and the groove surface of the second wedge-shaped groove are relaxed and not pressed, and the two second clamping blocks 3 move away from each other to relax the test sample 4.

[0042] In the present invention, two second clamping blocks 3 are provided at the ends of the second limiting column; a second end plate connected to the second base 5 is provided on the outer periphery of the second driving member, and the second end plate is bolted to the second base 5 .

[0043] Preferably, a second vertical guide rod 14 is further provided on the top of the second base 5 ; the second guide rod 14 is adapted to the second guide hole on the second guide slider 13 ; and the second guide slider 13 is mounted on the first slide rail 7 .

[0044] In the present invention, the second guide hole is a vertical hole, and the second guide rod 14 moves vertically along the second guide hole; and the second guide slider 13 can drive the second guide rod 14 to move horizontally along the second slide rail 8. The vertical movement of the second guide rod 14 and the horizontal movement of the second guide slider 13 do not interfere with each other.

[0045] In the present invention, the inner side surfaces of the two clamping assemblies are arranged facing each other, thereby ensuring symmetrical clamping of the test sample 4 and improving accuracy.

[0046] A composite material shear test method, the method comprising: preparing a test sample 4 of the composite material to be tested; Providing a composite shear test fixture as described above; Connect the upper interface 1 and the lower interface 6 of the composite material shear test fixture to the corresponding test equipment respectively; Push the two clamping assemblies horizontally in opposite directions, and the bases of the two clamping assemblies move in opposite directions along the first slide rail 7 and the second slide rail 8, respectively, leaving enough space for installing the sample; Place one side of the test sample 4 between the two first clamping blocks 15 of the first clamping assembly, and align the test sample 4 with the edge of the first base 2. (In the initial state, the first oil chamber 17 is filled with hydraulic oil.) Drain the hydraulic oil in the first oil chamber 17. At this time, the first driving member 16 moves within the first annular cavity away from the first clamping block 15, so that the two first clamping blocks 15 approach each other and clamp the test sample 4, ensuring that the V-shaped notch of the test sample 4 is centered. Push the second base of the second clamping assembly horizontally so that the other side of the test sample 4 is located between the two second clamping blocks of the second clamping assembly and is in contact with the edge of the second base 5. (In the initial state, the second oil chamber is filled with hydraulic oil.) Drain the hydraulic oil in the second oil chamber. At this time, the second driving member moves in the second annular cavity away from the second clamping block 3, so that the two second clamping blocks 3 are close to each other and clamp the test sample 4. Set test parameters according to test requirements, including loading rate, maximum load, displacement range, etc.; Start the test equipment, keep the second base 5 fixed, move the first base 2 vertically upward, and shear the test sample 4; monitor the test equipment in real time during the shearing process, and collect data such as load, displacement, and strain to observe the deformation and failure process of the test sample 4 until the test sample 4 reaches the specified failure level. The test is completed and the equipment stops the test automatically or manually.

[0047] In the present invention, based on the load, displacement and strain data collected in the test, the mechanical performance indicators such as the in-plane shear strength and in-plane shear modulus of the test sample 4 are calculated to evaluate the in-plane shear performance of the test sample 4.

[0048] In the present invention, when the first base 2 moves vertically upward, the first guide rod 11 at the bottom moves vertically in the first guide slider 12, and at the same time, the second guide rod 14 at the top of the second base 5 moves vertically in the second guide slider 13; the design of the first guide slider 12 and the second guide slider 13 is based on not affecting the vertical movement of the first base 2 and the second base 5.

[0049] In the present invention, the composite material to be tested is cut according to the test requirements to produce a V-notch test sample 4 that meets the size requirements, ensuring that the notch angle, depth, etc. meet the test requirements; at the same time, the length, width, thickness, etc. of the test sample 4 are measured.

[0050] In the present invention, before installing the test sample 4, check whether each slider and the corresponding slide rail, each guide rod and the corresponding guide slider are smooth to avoid jamming.

[0051] In the present invention, after the test sample 4 is clamped, it is ensured that the V-shaped notch of the test sample 4 is located at the center of the clamping space A.

[0052] The present invention adds a first slide rail 7 and a second slide rail 8 arranged in parallel in the horizontal direction, which are respectively connected through corresponding clamping components to form a rigid closed loop. During the shear load application process, when the main shaft of the testing machine tends to twist due to uneven force and lateral force is applied to the shear test fixture, this rigid closed loop can efficiently transmit and evenly distribute the force exerted on the clamping components on both sides. For example, the lateral force exerted on the clamping component on one side of the test sample 4 will be transmitted to the clamping block on the other side of the test sample 4 through the base, guide rod, movable slider, slide rail, etc., so that the entire system can bear the external force together, thereby enhancing the horizontal rigidity of the entire shear test fixture, avoiding twisting during the shear test of the V-notch specimen, and improving the force transmission stability and the accuracy of the test data during the test.

[0053] In the present invention, the vertically arranged first guide rod 11 and the second guide rod 14 are closely matched with the corresponding first guide slider 12 and the second guide slider 13 respectively. When the shear force acts on the sample, the guide rod can limit the shaking, tilting and twisting of the clamping assembly in the vertical direction, ensuring that it always remains in a vertical state.

[0054] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0055] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A composite material shear test fixture with a linked slide rail to enhance rigidity, characterized in that: It includes a first slide rail, a second slide rail, a first clamping assembly and a second clamping assembly; The first slide rail and the second slide rail are vertically parallel and horizontally arranged; An upper interface is provided on the top of the first slide rail; The upper end of the first clamping assembly is slidably connected to the first slide rail, and the lower end of the first clamping assembly is connected to the second slide rail; One side of the first clamping component is concave to form a clamping space A; A lower interface is provided at the bottom of the second slide rail; The lower end of the second clamping assembly is slidably connected to the second slide rail, and the upper end of the second clamping assembly is connected to the first slide rail; One side of the second clamping assembly is concave to form a clamping space B, and the clamping space B and the clamping space A are combined to form a clamping cavity; The test sample is horizontally arranged in the clamping cavity; one side of the test sample is fixed to the inner side of the first clamping component, and the other side of the test sample is fixed to the side of the second clamping component.

2. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 1, characterized in that: The first clamping assembly includes a first base and a first clamping block; A first slider is fixed to the upper end of the first base, and the first slider is adapted to the first slide rail; Two first clamping blocks arranged front and back are installed on the inner side of the first base, and one side of the test sample is arranged between the two first clamping blocks; the first clamping block is connected to a first driving member arranged in the first base.

3. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 2, characterized in that: A first annular cavity is provided in the first base, and a first limiting column is formed at the center of the first annular cavity for limiting the end of the test sample; the first driving member is an annular movable member, which is sleeved on the first limiting column, and the first driving member is located in the first annular cavity, and a first oil cavity is formed between the rear end of the first driving member and the first annular cavity, and an oil inlet and an oil outlet connected to the first oil cavity are provided on the first base; a first wedge-shaped groove is provided on the inner side of the front end of the first driving member; the two first clamping blocks are both wedge-shaped blocks, which are provided with an inclined surface that cooperates with the first wedge groove, and the two are installed in the first wedge groove.

4. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 3, characterized in that: A first end plate connected to the first base is provided on the outer periphery of the first driving member, and the first end plate is connected to the first base with bolts.

5. The composite material shear test fixture with a linked slide rail and enhanced rigidity according to any one of claims 2 to 4, characterized in that: A vertical first guide rod is further provided at the bottom of the first base; the first guide rod is adapted to the first guide hole on the first guide slider; and the first guide slider is installed on the second slide rail.

6. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 2 or 3, characterized in that: The second clamping assembly includes a second base and two second clamping blocks; A second slider is provided at the lower end of the second base, and the second slider is adapted to the second slide rail; Second clamping blocks arranged front and back are installed on the inner side of the second base, and the other side of the test sample is arranged between the two second clamping blocks; the second clamping block is connected to a second driving member arranged in the second base.

7. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 6, characterized in that: A second annular cavity is provided in the second base, and a second limiting post is formed at the center of the second annular cavity for limiting the end of the test sample; the second driving member is an annular moving member, which is sleeved on the second limiting post and is located in the second annular cavity. A second oil cavity is formed between the rear end of the second driving member and the second annular cavity, and an oil inlet and an oil outlet communicating with the second oil cavity are formed on the second base; A second wedge-shaped groove is formed on the inner side of the front end of the second driving member; The two second clamping blocks are both wedge-shaped blocks, provided with inclined surfaces that match the second wedge-shaped grooves, and the two are installed in the second wedge-shaped grooves.

8. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 7, characterized in that: A second end plate connected to the second base is provided on the outer periphery of the second driving member, and the second end plate is connected to the second base with bolts.

9. The composite material shear test fixture with a linked slide rail and enhanced rigidity as claimed in claim 7, characterized in that: A second vertical guide rod is further provided on the top of the second base; the second guide rod is adapted to the second guide hole on the second guide slider; and the second guide slider is installed on the first slide rail.

10. A composite material shear test method, characterized in that: The method is: Prepare test samples of the composite materials to be tested; Providing a composite shear test fixture as claimed in claim 7; Connecting the upper and lower interfaces of the composite material shear test fixture to corresponding test equipment respectively; Push the two clamping assemblies horizontally in opposite directions, and the bases of the two clamping assemblies move in opposite directions along the first slide rail and the second slide rail respectively, leaving space for installing the test specimen; Place one side of the test sample between the two first clamping blocks of the first clamping assembly and align it with the edge of the first base; drain the hydraulic oil in the first oil chamber, and then move the first driving member in the first annular chamber away from the first clamping block, so that the two first clamping blocks approach each other and clamp the test sample; Push the second base of the second clamping assembly horizontally toward the first clamping assembly, so that the other side of the test sample is located between the two second clamping blocks of the second clamping assembly and is in contact with the edge of the second base. Drain the hydraulic oil in the second oil chamber. At this time, the second driving member moves in the second annular chamber away from the second clamping block, so that the two second clamping blocks are close to each other and clamp the test sample. Set test parameters according to test requirements; Start the test equipment, keep the second base fixed, move the first base vertically upward, and shear the test sample; monitor the test equipment in real time during the shearing process, and collect data such as load, displacement, and strain to observe the deformation and failure process of the test sample 4. Stop the test after the test is completed.

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