CN217765813U - Composite sandwich structure test fixture - Google Patents

Abstract

A composite sandwich structure test fixture, comprising: the installation pole, loading frame, first straight cushion, the straight cushion of second and supporting platform that top-down set up perpendicularly in proper order, wherein: the mounting rod is arranged at the center of the top of the loading frame, the first straight cushion block is arranged in the loading frame, and the second straight cushion block is arranged on the supporting platform. The device fixes the test piece and the testing machine through the clamp, utilizes the interaction between different accessories, thereby saving the design of extension and transition section, improving the reliability of structural test, reducing the test cost and facilitating the repeated use.

Description

Composite Sandwich Structure Test Fixture

technical field

The utility model relates to a technique in the field of instruments and meters, in particular to a fixture for testing a T-shaped joint of a sandwich structure of composite materials.

Background technique

The current fixture for testing the tensile performance of T-joints of sandwich structures generally adopts the method of punching holes in the structure, which is common in metal testing, and fixes the test piece and the testing machine by punching holes for testing. The traditional method works well on metal joints, but it is easy to cause delamination defects when applied to composite materials, which leads to premature failure of the material and cannot truly reflect the tensile properties of the material. At the same time, the conventional method requires end extension and transition design of the structural parts, resulting in larger size of the test piece and higher cost, which is not conducive to repeated tests.

Utility model content

The utility model aims at the above-mentioned deficiencies in the prior art, and proposes a composite material sandwich structure test fixture, which fixes the test piece and the testing machine through the fixture, and utilizes the interaction between different accessories, thus eliminating the need for extension design and transition section design , which improves the reliability of the structural testing test, reduces the test cost, and facilitates repeated use.

The utility model is achieved through the following technical solutions:

The utility model comprises: a mounting rod, a loading frame, a first straight block, a second straight block and a support platform arranged vertically from top to bottom, wherein: the mounting rod is arranged at the center of the top of the loading frame, and the first straight block It is arranged in the loading frame, and the second straight block is arranged on the supporting platform.

The loading frame is an inverted U structure, and several rows of bolts are arranged symmetrically on both sides of the loading frame.

The top of the loading frame is provided with a connecting plate for connecting with the installation rod.

The support platform is evenly provided with fastening clips, and the fastening clips have an irregular rectangular structure, wherein: one end of the fastening clip is set on the bottom of the support platform, and the other end is set on the second straight pad.

The support platform is a cylindrical structure, and a support rod is provided at the bottom of the support platform.

The first straight pad is provided with a chamfer structure, and the two sides of the first straight pad are provided with positioning points for matching with the bolts.

The second straight pad is provided with a wedge-shaped corner structure.

The mounting rod is a cylindrical structure.

technical effect

Compared with the prior art, the utility model fixes the test piece and the testing machine through the clamp, realizes the clamping and fixing of the test piece by using the interaction between different accessories, saves the design of the extension section and the transition section, and avoids the The holes on the composite material and the test piece reduce the additional damage to the test piece; the structure of the test piece itself is not changed, so that the test results have higher accuracy and reliability.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is the explosion schematic diagram of the utility model;

In the figure: installation rod 1, loading frame 2, first straight block 3, bolt 4, second straight block 5, support platform 6, fastening clamp 7, T-joint sample 8, connecting plate 9, support rod 10.

Detailed ways

As shown in Figure 1, it is a fixture for testing a composite material sandwich structure T-joint related to this embodiment, which includes: a mounting bar 1, a loading frame 2, and a first straight block arranged vertically from top to bottom 3. The second straight spacer 4 and the support platform 6, wherein: the installation rod 1 is set on the top center of the loading frame 2, the first straight spacer 3 is set in the loading frame 2, and the second straight spacer 5 is set on the support platform 6.

As shown in FIG. 2 , the loading frame 2 is an inverted U structure, and several rows of bolts 4 for applying pretightening force are arranged symmetrically on both sides of the loading frame 2 .

The top of the loading frame 2 is provided with a connecting plate 9 for connecting with the installation rod 1 .

The support platform 6 is evenly provided with fastening clips 7, and the fastening clips 7 have an irregular rectangular structure, wherein: one end of the fastening clips 7 is set on the bottom of the support platform 6, and the other end is set on the second straight pad 5 .

The support platform 6 is a cylindrical structure, and a support rod 10 is provided at the bottom of the support platform 6 .

The first straight block 3 is provided with a chamfer structure, and the two sides of the first straight block 3 are provided with positioning points for matching with the bolts 4 .

The second straight pad 5 is provided with a wedge-shaped corner structure.

The mounting rod 1 is a cylindrical structure.

In this embodiment, the clamp assembly is carried out in the following manner: the T-joint sample 8 is placed in the center of the support platform 6, and the accessories of the clamp are installed in sequence; the second straight pad 5 is placed on the bottom of the T-joint sample 8, and Install the fastening clip 7 to apply a fastening force to the lower end of the T-joint sample 8; place the first straight pad 3 on the T-joint sample 8 to the vicinity of the root, and then place the loading frame 2 on the first straight pad 3, and one-to-one correspondence between the positioning point and the bolt 4, to limit the displacement of the first straight block 3 and apply a pre-tightening force to the upper end of the T-joint sample 8; install the installation rod 1 on the bottom of the loading frame 2; Pretightening force was applied to the type joint sample 8 to achieve tensile loading, and the performance test was carried out.

The above specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the utility model. The scope of protection of the utility model is subject to the claims and is not limited by the above specific implementation. Each implementation scheme within its scope is bound by the utility model.

Claims (8)

1. The utility model provides a clamp for test of combined material sandwich structure T type joint which characterized in that includes: the installation pole, loading frame, first straight cushion, the straight cushion of second and supporting platform that top-down set up perpendicularly in proper order, wherein: the mounting rod is arranged at the center of the top of the loading frame, the first straight cushion block is arranged in the loading frame, and the second straight cushion block is arranged on the supporting platform.

2. The clamp of claim 1, wherein the loading frame is an inverted U-shaped structure, and a plurality of rows of bolts are symmetrically arranged on two sides of the loading frame.

3. The jig of claim 1 wherein the top of the loading frame is provided with a connecting plate for connecting to the mounting bar.

4. The jig of claim 1 wherein the support platform is uniformly provided with fastening clips having an irregular rectangular configuration, wherein: one end of the fastening clamp is arranged at the bottom of the supporting platform, and the other end of the fastening clamp is arranged on the second straight cushion block.

5. The jig of claim 1 wherein the support platform is a cylindrical structure and the support rods are provided at the bottom of the support platform.

6. The clamp of claim 1, wherein the first straight pad has a chamfer structure, and the first straight pad has positioning points at two sides thereof for engaging with the bolt.

7. The fixture of claim 1, wherein said second straight spacer is provided with a wedge-shaped angle structure.

8. The clamp of claim 1 wherein said mounting bar is of cylindrical configuration.

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