Composite material compression fixture with coupling effect of load and environment and using method

A composite material and fixture technology, applied in the direction of using stable tension/pressure to test the strength of materials, analyzing materials, instruments, etc., can solve the problem of ineffectiveness, less exploration of service performance tests, electronic instruments and digital displays that cannot work normally, etc. problem, to achieve the effect of simple structure, simple test method and high flexibility

Active Publication Date: 2021-06-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, composite materials are gradually attracting everyone's attention. With the gradual expansion of the application field of composite materials, they are faced with a variety of service environments, and it is relatively difficult to test the service performance of composite materials under extreme environments under long-term stable compressive loads. The main difficulty is that the test of applying accurate quantitative compressive loads to composite material samples in extreme environments cannot be effectively carried out because the electronic instruments and digital displays that apply the load cannot work normally in extreme environments

Method used

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  • Composite material compression fixture with coupling effect of load and environment and using method
  • Composite material compression fixture with coupling effect of load and environment and using method
  • Composite material compression fixture with coupling effect of load and environment and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as Figure 1-5 As shown, this embodiment provides a composite material compression fixture that couples the load and the environment, including a fixture base 1, a holder, a spring frame 5, a long screw 2, a spring 6, a retainer 7 and a limit nut 8; The holder is used to clamp the composite material sample 10; one end of the long screw 2 is connected to the clamp base 1, the other end of the long screw 2 is provided with threads, and the stopper 7 is arranged on the long screw The other end of 2, the limit nut 8 is connected with the thread; the spring frame 5 is a T-shaped structure, and a guide hole is arranged in the middle of the blocking plate 7, and the two ends of the spring frame 5 are movably sleeved On the long screw rod 2, the spring 6 is sheathed on the tail end of the spring frame 5, and the tail end of the spring frame 5 extends into the guide hole.

[0032] The fixture base 1 is composed of a stopper 1a and a mounting platform 1b. In order to ensure...

Embodiment 2

[0042] This embodiment provides a method for using a composite material compression fixture coupled with load and environment, including the following steps:

[0043] The composite material sample 10 is a composite material plate reinforced with carbon fiber, glass fiber, aramid fiber, basalt fiber, sulfonamide fiber, and ultra-high molecular weight polyethylene fiber, and the thickness of the plate is 0.5mm-2mm, preferably 1mm; The length of the composite material sample 10 is 75mm-150mm, preferably 80mm, and the width of the composite material sample 10 is 5mm-30mm, preferably 15mm. The number of composite material samples 10 in the same batch is 10 or more.

[0044] Further, 5 composite material samples 10 of the same batch are randomly selected for uniaxial compression performance testing, and the 5 composite material samples 10 are compressed to fracture to calculate the ultimate compressive strength of the composite material sample 10 .

[0045] After assembling the pa...

Embodiment 3

[0064] This embodiment relates to a test method for a composite material compression fixture utilizing the coupling effect of load and environment, which specifically includes the following steps:

[0065] Composite material sample 10 with aramid fiber twill fabric as reinforcement, sample 10 has a length of 80 mm, a width of 15 mm, and a thickness of 1 mm. Utilize the compression fixture to clamp the composite material sample 10, and apply compression to the spring 6, so that the load strength applied by the spring 6 to the composite material sample 10 is 40% of the ultimate compressive load of the composite material, and place the adjusted compression fixture horizontally In the salt spray test chamber, the salt spray solution is 5% sodium chloride solution and glacial acetic acid is added dropwise to reduce the pH value of the solution to between 3.1 and 3.3, and the sedimentation rate of the salt spray is 1 to 2ml / 80cm 2Between h. The test temperature is 35°C. The test d...

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Abstract

The invention discloses a composite material compression fixture and its use method for the coupling effect of load and environment, and relates to the technical field of composite material compression testing devices. position nut; the holder is used to clamp the composite material sample; one end of the long screw is connected to the fixture base, the other end of the long screw is provided with a thread, the stopper is provided at the other end of the long screw, and the limit nut is connected with the thread; the spring The frame is a T-shaped structure, a guide hole is set in the middle of the block, the two ends of the spring frame are sleeved on the long screw, the spring is sleeved at the tail end of the spring frame, and the tail end of the spring frame extends into the guide hole; In the case of equipment, provide accurate and quantitative compressive loads for composite material tests in extreme environments, complete service simulation tests of composite materials bearing compressive loads in various extreme environments, and adjust according to different environmental simulation requirements and different types of samples Test conditions and procedures.

Description

technical field [0001] The invention relates to the technical field of composite material compression testing devices, in particular to a composite material compression fixture and a method for using the coupling effect of load and environment. Background technique [0002] At present, composite materials are gradually attracting everyone's attention. With the gradual expansion of the application field of composite materials, they are faced with a variety of service environments, and it is relatively difficult to test the service performance of composite materials under extreme environments under long-term stable compressive loads. The main difficulty is that the test of applying accurate quantitative compressive loads to composite material samples in extreme environments cannot be effectively carried out because the electronic instruments and digital displays that apply the load cannot work normally in extreme environments. The compression test device can apply accurate and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/14G01N3/18
CPCG01N3/04G01N3/14G01N3/18G01N2203/0019G01N2203/0035G01N2203/022G01N2203/0226G01N2203/0228G01N2203/0232G01N2203/0423
Inventor 李敏车辙王绍凯顾轶卓范燕生
Owner BEIHANG UNIV
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