Fixture for shearing test of fiber reinforced composite material
By designing a fiber-reinforced composite shear testing fixture including a support seat, a left clamping mechanism and a right clamping mechanism, the step-type fit ensures the stress balance of the sample, the problems of inaccurate test results and difficulty in considering material anisotropy in the prior art are solved, and higher test accuracy and repeatability are achieved.
Patent Information
- Application Number
- CN202420957071.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-06
AI Technical Summary
Existing fiber reinforced composite shear testing fixtures cannot give accurate boundary conditions, which affects the accuracy and repeatability of the test results, and it is difficult to consider the anisotropy of the material.
A fiber-reinforced composite shear testing fixture including a support base, a left clamping mechanism and a right clamping mechanism is designed to ensure that the sample is subjected to force equalization in the shear test and can apply shear load in the exact position through a step-type fit between the first clamping block and the clamping base and between the second clamping block and the slider.
Improves the accuracy and repeatability of test results, and provides accurate clamping forces and shear loads when taking into account material anisotropy, providing more reliable performance data for engineering applications of fiber reinforced composites.
Smart Images
Figure CN222599354U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shear testing equipment, in particular to a shear testing fixture for fiber reinforced composite materials. Background Art
[0002] In the prior art, fiber-reinforced composite materials are widely used in aerospace, automobile manufacturing, sports equipment and other fields, and their excellent light weight and high strength properties make them a popular material choice. However, due to their non-uniformity and anisotropy, it is crucial to conduct comprehensive and accurate testing of their performance. At present, there are some problems with the traditional fixture design for shear performance testing of fiber-reinforced composite materials. For example, traditional fixtures may not be able to give accurate boundary conditions, thus affecting the accuracy and repeatability of the test results. In addition, the design of a shear test fixture that matches the properties of the composite material is also a challenge because the anisotropy of the material in different directions needs to be taken into account. Therefore, the current background technology has certain limitations and challenges in this field.
[0003] In view of the above problems, the fixture designed by the utility model can effectively fix the sample and apply a uniform shear load while taking into account the anisotropy of the material. It can effectively avoid the problems existing in traditional fixtures, improve the accuracy and repeatability of test results, and provide more reliable performance data for the engineering application of fiber-reinforced composite materials. Summary of the invention
[0004] The utility model aims to provide a fiber reinforced composite material shear test fixture, wherein the first clamp block and the fixture base, as well as the second clamp block and the slider are respectively connected by the first clamp block fastening bolt and the second clamp block fastening bolt, and have strong interchangeability, are applicable to a variety of sizes, adopt a stepped fit to improve stability and reliability, ensure that the specimen is subjected to balanced force during the shear test, can apply the shear load at an accurate position, and can provide an accurate clamping force.
[0005] To achieve the above-mentioned objectives, the utility model provides a fiber reinforced composite material shear test fixture, including a support seat, a left clamping mechanism is provided on one side of the top of the support seat, a right clamping mechanism is provided on one side of the left clamping mechanism, the left clamping mechanism includes a fixture base, a first clamping block is provided on one side of the fixture base, and the right clamping mechanism includes a slider, and a second clamping block is provided on one side of the slider.
[0006] Preferably, the clamp base is located on one side of the support seat, and two guide pillars are provided on the top of the other side of the support seat, and the sliding block is sleeved on the guide pillars.
[0007] Preferably, the sliding block is provided with guide holes corresponding to the two guide pillars.
[0008] Preferably, the first clamp block and the clamp base are connected by a first clamp block fastening bolt, and the first clamp block and the clamp base are respectively provided with a first clamp block threaded hole and a base threaded hole corresponding to the first clamp block fastening bolt, and the second clamp block and the slider are respectively provided with a second clamp block threaded hole and a slider threaded hole corresponding to the second clamp block fastening bolt.
[0009] Preferably, the first clamping block and the fixture base, as well as the second clamping block and the sliding block, are in stepped fit.
[0010] Preferably, the sliding block is L-shaped.
[0011] Therefore, the utility model adopts the above-mentioned fiber reinforced composite material shear test fixture, and the first clamp block and the clamp base, as well as the second clamp block and the slider are connected respectively by the first clamp block fastening bolts and the second clamp block fastening bolts, with strong interchangeability and a wide range of applicable sizes. The stepped fit improves stability and reliability, ensuring that the specimen is subjected to balanced force during the shear test, can apply the shear load at an accurate position, and can provide accurate clamping force.
[0012] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall assembly of an embodiment of a fiber reinforced composite material shear test fixture of the utility model;
[0014] Figure 2 It is a schematic diagram of the assembly of the left clamping mechanism of a fiber reinforced composite material shear test fixture embodiment of the utility model;
[0015] Figure 3 It is a schematic diagram of the assembly of the right clamping mechanism of a fiber reinforced composite material shear test fixture embodiment of the utility model;
[0016] Figure 4 It is a structural schematic diagram of a base of an embodiment of a fiber reinforced composite material shear test fixture of the utility model;
[0017] Figure 5 This is a schematic diagram of the structure of a clamp block of a fiber reinforced composite material shear test fixture embodiment of the utility model;
[0018] Figure 6 The utility model is a structural schematic diagram of a slider in an embodiment of a fiber reinforced composite material shear test fixture.
[0019] Reference numerals
[0020] 1. Fixture base; 2. Slider; 3. First clamp; 4. Second clamp; 5. Fastening bolts of first clamp; 6. Fastening bolts of second clamp; 7. Guide column; 8. Guide hole; 9. Base threaded hole; 10. Slider threaded hole; 11. First clamp threaded hole; 12. Second clamp threaded hole; 13. Specimen. DETAILED DESCRIPTION
[0021] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.
[0022] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0023] Embodiment 1
[0024] like Figures 1 to 6 As shown, the utility model provides a fiber reinforced composite material shear test fixture, including a support seat, a left clamping mechanism is provided on one side of the top of the support seat, and a right clamping mechanism is provided on one side of the left clamping mechanism. The support seat provides support for the left clamping mechanism and the right clamping mechanism, and the left clamping mechanism and the right clamping mechanism provide shear force for the sample 13.
[0025] The left clamping mechanism includes a clamp base 1, which is located on one side of the support seat. A first clamp block 3 is provided on one side of the clamp base 1. The clamp base 1 provides support for the first clamp block 3. The first clamp block 3 and the clamp base 1 can clamp the sample 13. The first clamp block 3 is connected to the clamp base 1 by four first clamp block fastening bolts 5. The first clamp block 3 and the clamp base 1 are respectively provided with first clamp block threaded holes 11 and base threaded holes 9 corresponding to the first clamp block fastening bolts 5, so that the first clamp block fastening bolts 5 can fasten the first clamp block 3 and the clamp base 1.
[0026] The right clamping mechanism includes a slider 2, and the slider 2 is L-shaped. Two guide posts 7 are provided on the top of the other side of the support seat, and the slider 2 is sleeved on the guide posts 7. The slider 2 is provided with guide holes 8 corresponding to the two guide posts 7. The guide posts 7 and the guide holes 8 facilitate the up and down movement of the slider 2. A second clamping block 4 is provided on one side of the slider 2, and the slider 2 and the second clamping block 4 can clamp the sample 13. The second clamping block 4 is connected to the slider 2 by four second clamping block fastening bolts 6. The second clamping block 4 and the slider 2 are respectively provided with second clamping block threaded holes 12 and slider threaded holes 10 corresponding to the second clamping block fastening bolts 6, so that the second clamping block fastening bolts 6 can fasten the second clamping block 4 and the slider 2.
[0027] The first clamp block 3 and the fixture base 1 as well as the second clamp block 4 and the slider 2 are all stepped, and the size and height of the second step between the first clamp block 3 and the fixture base 1 as well as the second step between the second clamp block 4 and the slider 2 are consistent with the width of the sample 13, ensuring that the sample 13 is subjected to balanced force during the shear test, can apply the shear load at the correct position, and can provide accurate clamping force, and is suitable for all sheet and strip materials within this size range.
[0028] When the fiber reinforced composite shear test fixture provided by the utility model is used, the slider 2 is first sleeved on the guide column 7, and then the first clamp block 3 and the second clamp block 4 are respectively fixed to the fixture base 1 and the slider 2 through four first clamp block fastening bolts 5 and four second clamp block fastening bolts 6. When the shear test is performed on the sample 13, the first clamp block fastening bolts 5 and the second clamp block fastening bolts 6 are first loosened, and then the sample 13 is placed on the second step of the left clamping mechanism and the right clamping mechanism, and the first clamp block fastening bolts 5 and the second clamp block fastening bolts 6 are tightened, and then the slider 2 moves along the guide column 7. Since the left clamping mechanism is fixed, the movement of the right clamping mechanism can achieve the shearing of the sample 13.
[0029] Therefore, the utility model adopts the above-mentioned fiber reinforced composite material shear test fixture, and the first clamp block and the clamp base, as well as the second clamp block and the slider are connected respectively by the first clamp block fastening bolts and the second clamp block fastening bolts, with strong interchangeability and a wide range of applicable sizes. The stepped fit improves stability and reliability, ensuring that the specimen is subjected to balanced force during the shear test, can apply the shear load at an accurate position, and can provide accurate clamping force.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.
Claims
1. A fiber reinforced composite shear test fixture, characterized in that: It includes a support seat, a left clamping mechanism is provided on one side of the top of the support seat, a right clamping mechanism is provided on one side of the left clamping mechanism, the left clamping mechanism includes a clamp base, a first clamping block is provided on one side of the clamp base, and the right clamping mechanism includes a slider, a second clamping block is provided on one side of the slider.
2. A fiber reinforced composite material shear test fixture according to claim 1, characterized in that: The clamp base is located on one side of the support seat, and two guide pillars are arranged on the top of the other side of the support seat, and the sliding block is sleeved on the guide pillars.
3. A fiber reinforced composite material shear test fixture according to claim 2, characterized in that: The sliding block is provided with guide holes corresponding to the two guide pillars.
4. A fiber reinforced composite material shear test fixture according to claim 1, characterized in that: The first clamp block and the clamp base are connected by a first clamp block fastening bolt, and the first clamp block and the clamp base are respectively provided with a first clamp block threaded hole and a base threaded hole corresponding to the first clamp block fastening bolt, and the second clamp block and the slider are respectively provided with a second clamp block threaded hole and a slider threaded hole corresponding to the second clamp block fastening bolt.
5. The fiber reinforced composite material shear test fixture according to claim 1, characterized in that: The first clamping block and the fixture base as well as the second clamping block and the sliding block are all in step-type cooperation.
6. The fiber reinforced composite material shear test fixture according to claim 1, characterized in that: The shape of the sliding block is L-shaped.