Tensile shear test adjustable device for lightweight composite material structure

Abstract

The utility model relates to a tensile shear test adjustable device for a lightweight composite material structure, which belongs to the technical field of composite materials, and comprises an upper chuck and a lower chuck, the upper end of the upper chuck is fixed with the upper clamping end of a universal extension testing machine, and the bottom end of the lower chuck is fixed with the lower clamping end of the universal extension testing machine; the upper chuck is provided with a sliding groove, the sliding block is slidably connected with the upper chuck through the sliding groove, the lower portion of the sliding block is hinged to the connecting frame A, and the lower chuck is hinged to the connecting frame B; the connecting frame A is connected with the metal plate A, the connecting frame B is connected with the metal plate B, and the metal plate A and the metal plate B are used for fixing the lightweight composite material; according to the tensile shear test adjustable device for the lightweight composite material structure, a lightweight composite material to be measured can be in a relatively parallel state with the upper clamping end and the lower clamping end by adjusting the sliding block and matching relative rotation of the sliding block and the connecting frame and relative rotation of the lower clamping head and the connecting frame, and the accuracy of a measurement result is ensured.

Description

Technical Field

[0001] The utility model relates to an adjustable device for tensile shearing test of a lightweight composite material structure, belonging to the technical field of composite materials. Background Art

[0002] Composite materials are a new material that uses advanced material preparation technology to optimize the combination of material components with different properties. Due to its unique properties, composite materials have the advantages of multiple materials and gradually replace single materials in high-end fields. With the continuous development and innovation of composite materials, people are increasingly pursuing high-performance lightweight structures, which show extremely high applicability in life applications. In application, lightweight composite materials structures must meet different working conditions, such as tensile and shear resistance at one location.

[0003] Since lightweight composite materials have only been around for a short time, there are still gaps and deficiencies in the tests in production and life. For example, the existing composite material tensile shear fixture can only ensure that the clamping ends are in a relatively parallel state, but cannot ensure that the measured composite material samples are also in a relatively parallel state. This phenomenon will cause the force exerted on the lightweight composite material during the tensile shear process to no longer be a tensile stress parallel to the sample, but a tensile stress that is at an angle to the sample. This makes the measurement of lightweight composite materials inaccurate, affecting the accuracy of the measurement and the economy of use. Therefore, it is necessary to improve the design of the lightweight composite material tensile shear test device. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide an adjustable device for tensile shear test of lightweight composite materials, which can adjust the lightweight composite material to be measured to be in a relatively parallel state with the clamping end, thereby ensuring the accuracy of the measurement results.

[0005] The utility model discloses an adjustable tensile shear test device for lightweight composite material structure, comprising an upper chuck and a lower chuck, wherein the upper end of the upper chuck is fixed to the upper clamping end of a universal extension tester, and the bottom end of the lower chuck is fixed to the lower clamping end of the universal extension tester; the upper chuck is provided with a slide groove, and the slide block is slidably connected to the upper chuck through the slide groove, the lower part of the slide block is hinged to a connecting frame A, and the lower chuck is hinged to a connecting frame B; the connecting frame A is connected to a metal plate A, and the connecting frame B is connected to a metal plate B, and the metal plate A and the metal plate B are used to fix the lightweight composite material.

[0006] The technical solution of the utility model is to provide an adjustable device for tensile shear test of lightweight composite material structure, which can make the lightweight composite material to be measured and the upper and lower clamping ends in a relatively parallel state by adjusting the slider, thereby ensuring the accuracy of the measurement result.

[0007] Preferably, the upper chuck slide groove is T-shaped, and a threaded hole is provided on the slider for screwing in a bolt to tighten the upper chuck and position the slider.

[0008] Preferably, the connecting frame A has the same structure as the connecting frame B, and the metal plate A has the same structure as the metal plate B; the connecting frame A and the connecting frame B are provided with bosses, and the metal plates A and B are provided with grooves adapted thereto, and when in use, the bosses are inserted into the grooves to increase the connection strength between the connecting frame and the metal plates.

[0009] Preferably, the connecting frame A and the metal plate A, as well as the connecting frame B and the metal plate B are connected by bolts, and the metal plate A and the metal plate B can be fixed to the lightweight composite material by an adhesive.

[0010] Furthermore, the contact surfaces of the metal plates A and B used to connect with the lightweight composite material are rough surfaces to prevent the contact surfaces from being too smooth, causing debonding and affecting the accuracy of the measurement results; the metal plates A and B move in opposite directions to make the lightweight composite material withstand tensile shear force.

[0011] Preferably, both the metal plate A and the metal plate B are provided with level installation holes for installing the level.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The adjustable tensile shear test device for lightweight composite material structures described in the utility model can adjust the slider and coordinate the relative rotation of the slider and the connecting frame, and the lower clamp and the connecting frame, so that the lightweight composite material to be measured and the upper and lower clamping ends are in a relatively parallel state, thereby ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a three-dimensional diagram of the upper chuck;

[0016] Figure 3 is a stereogram of a slider;

[0017] Figure 4 is a three-dimensional diagram of a connecting frame A and a connecting frame B;

[0018] Figure 5 is a three-dimensional diagram of metal plate A and metal plate B;

[0019] Figure 6 It is a three-dimensional view of the lower chuck.

[0020] In the figure: 1. upper chuck; 11. slide groove; 2. slider; 21. threaded hole; 3. metal plate A; 31. spirit level; 32. groove; 33. rough surface; 34. spirit level mounting hole; 4. lower chuck; 5. connecting frame A; 51. boss; 6. metal plate B; 7. connecting frame B. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with specific embodiments.

[0022] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0023] For example, multiple embodiments may have multiple changes and multiple forms, and it should be understood that the scope of rights of the present utility model includes equivalents that can realize the technical idea.

[0024] like Figures 1 to 6 As shown, this embodiment is realized by the following technical scheme: it includes an upper chuck 1 and a lower chuck 4, the upper end of the upper chuck 1 is fixed to the upper clamping end of the universal extension tester, and the bottom end of the lower chuck 4 is fixed to the lower clamping end of the universal extension tester; the upper chuck 1 is provided with a slide groove 11, the slider 2 is slidably connected to the upper chuck 1 through the slide groove 11, the lower part of the slider 2 is hinged to the connecting frame A5, and the lower chuck 4 is hinged to the connecting frame B7; the connecting frame A5 is connected to the metal plate A3, the connecting frame B7 is connected to the metal plate B6, and the metal plate A3 and the metal plate B6 are used to fix the lightweight composite material. The slide groove 11 of the upper chuck is T-shaped; the slider 2 is provided with a threaded hole 21, which is used to screw in a bolt to tighten the upper chuck 1 and position the slider 2.

[0025] The connecting frame A5 has the same structure as the connecting frame B7, and the metal plate A3 has the same structure as the metal plate B6; the connecting frame A5 and the connecting frame B7 are provided with a boss 51, and the metal plate A3 and the metal plate B6 are provided with a groove 32 adapted thereto, and the boss 51 is inserted into the groove 32 when in use to increase the connection strength between the connecting frame and the metal plate. The connecting frame A5 and the metal plate A3, and the connecting frame B7 and the metal plate B6 are connected by bolts, and the metal plate A3 and the metal plate B6 can fix the lightweight composite material by an adhesive. The contact surface of the metal plate A3 and the metal plate B6 used to connect with the lightweight composite material is a rough surface 33 to prevent the contact surface from being too smooth and causing debonding, which affects the accuracy of the measurement results; the metal plate A3 and the metal plate B6 are driven to move in the opposite direction by the universal extension tester, so that the lightweight composite material is subjected to tensile shear force. The metal plate A3 and the metal plate B6 are provided with a level installation hole 34 for installing the level 31.

[0026] The method of using the utility model is:

[0027] 1. Place the lightweight composite material to be measured between the metal plate A3 and the metal plate B6, apply adhesive on the rough surfaces 33 of the two metal plates, and fix them to the lightweight composite material;

[0028] 2. Fix the clamping end of the upper chuck 1 to the upper clamping end of the universal extension tester, and fix the bottom end of the lower chuck 4 to the lower clamping end of the universal extension tester;

[0029] 3. Adjust the position of the slider 2 in the upper chuck slot 11, and use the level 31 to measure whether the position of the lightweight composite material structure is parallel to the upper and lower chucks. When the bubble is in the center of the level 31, the angle adjustment is completed, and the positioning bolts under the slider 2 are tightened to fix the position angle;

[0030] 4. Operate the universal extension testing machine to move the upper clamping end upward to complete the tensile shear test.

[0031] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. An adjustable device for tensile shear testing of lightweight composite materials, characterized in that: The invention comprises an upper chuck (1) and a lower chuck (4), wherein the upper end of the upper chuck (1) is fixed to the upper clamping end of the universal extension tester, and the bottom end of the lower chuck (4) is fixed to the lower clamping end of the universal extension tester; the upper chuck (1) is provided with a slide groove (11), the slider (2) is slidably connected to the upper chuck (1) via the slide groove (11), the lower part of the slider (2) is hinged to a connecting frame A (5), and the lower chuck (4) is hinged to a connecting frame B (7); the connecting frame A (5) is connected to a metal plate A (3), and the connecting frame B (7) is connected to a metal plate B (6).

2. The adjustable tensile shear test device for lightweight composite material structure according to claim 1, characterized in that: The upper chuck slide groove (11) is T-shaped, and a threaded hole (21) for positioning is provided on the slide block (2).

3. The adjustable tensile shear test device for lightweight composite material structure according to claim 1, characterized in that: The connecting frame A (5) and the connecting frame B (7) have the same structure, and the metal plate A (3) and the metal plate B (6) have the same structure; the connecting frame A (5) and the connecting frame B (7) are provided with a boss (51), and the metal plate A (3) and the metal plate B (6) are provided with a groove (32) adapted thereto.

4. The adjustable tensile shear test device for lightweight composite material structure according to claim 3, characterized in that: The connecting frame A (5) and the metal plate A (3), as well as the connecting frame B (7) and the metal plate B (6) are connected by bolts, and the metal plate A (3) and the metal plate B (6) can be fixed with a lightweight composite material by an adhesive.

5. The adjustable tensile shear test device for lightweight composite material structure according to claim 4, characterized in that: The contact surfaces of the metal plate A (3) and the metal plate B (6) for contacting with the lightweight composite material are rough surfaces (33).

6. The adjustable tensile shear test device for lightweight composite material structure according to claim 5, characterized in that: The metal plate A (3) and the metal plate B (6) are provided with level installation holes (34) for installing a level (31).

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