Tool and method for testing bending mechanical property of honeycomb sandwich structure

A technology of honeycomb interlayer and testing tooling, which is applied to measuring devices, using stable tension/pressure to test the strength of materials, scientific instruments, etc., can solve the problems of difficult clamping and accurate positioning of displacement sensors, etc., to ensure self-balancing, guarantee Accuracy, the effect of ensuring stability

Active Publication Date: 2020-12-04
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a convenient, fast and stable testing tool and method for the problem of difficulty in clamping and accurately positioning the displacement sensor when testing the bending mechanical properties of the long beam of the honeycomb sandwich structure

Method used

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  • Tool and method for testing bending mechanical property of honeycomb sandwich structure
  • Tool and method for testing bending mechanical property of honeycomb sandwich structure
  • Tool and method for testing bending mechanical property of honeycomb sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present invention is a test tool for the bending mechanical properties of a honeycomb sandwich structure. The test tool includes: a tool base 1, a clamping device 2, a tool support 3 and a displacement sensor 18;

[0043] The tooling base 1 is installed on the beam of the testing machine, and the tooling base 1 is formed with a T-shaped chute 4;

[0044] The clamping device 2 is installed in the middle position on the tooling base 1, including a clamper 7, a bracket and a slide rail base 10, the bracket is arranged on the slide rail of the slide rail base 10, and the clamper 7 is arranged on the bracket , the clamper 7 clamps the displacement sensor 18, and the bracket includes an L-shaped fixed bracket 8 and a sliding bracket 9, and the L-shaped fixed bracket 8 and the sliding bracket 9 are fixed by bolts;

[0045] The tooling support 3 is arranged on the tooling base 1 on both sides of the clamping device 2, and can slide along the T-shaped chute 4 of the tooling ...

Embodiment 2

[0054] A kind of test method of the bending mechanical performance of honeycomb sandwich structure of the present invention, the steps are:

[0055] Step 1. On the long beam bending sample of the honeycomb sandwich structure, draw a center line along the length and width directions, and the intersection of the two center lines is the center point of the sample;

[0056] Step 2. Insert the positioning cylindrical rod of the tooling base into the tray on the beam of the testing machine to realize the connection and fixation of the tooling base and the beam of the testing machine;

[0057] Step 3. Clamp displacement sensor: place the slide rail base on the tooling base, adjust the lateral position of the slide rail base to ensure that the center line of the slide rail base is aligned with the zero scale line of the tooling base, and fix it; put the displacement sensor into the clamping device;

[0058] Step 4. Install the tooling support: slide the bottom of the tooling support in...

Embodiment 3

[0066] Such as figure 1 , 2 , 3, 4 shown. A tooling device for testing the bending mechanical properties of a long beam with a honeycomb sandwich structure is composed of a tooling base 1 , a clamping device 2 , a tooling support 3 and a displacement sensor 18 .

[0067] Step 1, on the honeycomb sandwich structure long beam bending sample 24, draw a center line respectively along the length and width directions, and the intersection of the two center lines is the center point of the sample;

[0068] Step 2. Insert the positioning cylindrical rod 6 of the tooling base 1 into the tray on the beam of the testing machine, and realize the connection and fixation of the tooling base 1 and the beam of the testing machine through the positioning hole 5;

[0069] Step 3: Clamp the displacement sensor, fix the slide rail base 10 and the limit plate 11 through screw connection, place the combined device of the slide rail base 10 and the limit plate 11 on the tooling base 1, and adjust ...

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Abstract

The invention discloses a tool and method for testing the bending mechanical property of a honeycomb sandwich structure. The tool comprises a tool base, a clamping device, a tool support and a displacement sensor. The tool base is mounted on a cross beam of a testing machine; the clamping device is installed in the middle of the tool base and clamps the displacement sensor; the tool support is arranged at the two sides of the clamping device; a connecting plate is arranged on the tool support, a flexible supporting plate is arranged on the connecting plate, and a balance supporting block is rotationally connected to the top end of the flexible supporting plate. When the tool is used, the span is accurately controlled by adjusting the relative position of the tool support on the base; by adjusting the relative position of the displacement sensor clamping device on the tool base, transverse and longitudinal accurate centering of the displacement sensor and the sample is achieved, the accuracy of a mechanical property test result is guaranteed, the displacement sensor can be rapidly disassembled in the test, the risk that the displacement sensor is damaged is avoided, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical performance testing, in particular to the technical field of bending mechanical performance testing of honeycomb sandwich structures. Background technique [0002] The development trend of lightweight aircraft has made composite materials, especially honeycomb sandwich structures, more and more widely used. The honeycomb sandwich structure will deform under the bending load. When the deformation is too large, the honeycomb sandwich structure will fail and cause flight accidents. Therefore, it is particularly important to accurately obtain the bending mechanical properties of long beams of this type of material. A commonly used method for measuring the bending mechanical properties of long beams of this type of material is to obtain the material P max And the P / Y value, and then evaluate the honeycomb sandwich structure. [0003] The mechanical properties of the material are obtained by loadin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/02G01N3/08
CPCG01N3/04G01N3/08G01N3/02G01N2203/0003G01N2203/0019G01N2203/0067G01N2203/0075G01N2203/04G01N2203/0682
Inventor 缑建杰周力佘加亮张川陈代鑫张莹丁力钊蔡怀阳陈俊佑
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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