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Dynamic tensile experimental device for detecting mechanical performance and microstructure of high polymer fiber on line

A microstructural, dynamic stretching technique used in measuring devices, testing material strength using applied stable tension/pressure, scientific instruments, etc.

Inactive Publication Date: 2017-08-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently a lack of a dynamic tensile experimental device that can be used for on-line detection of polymer fiber mechanical properties and microstructure, and the experimental device should at least be able to achieve: on-line detection, in-situ detection, rapid measurement and miniaturization, etc. Existing Experimental Test Requirements

Method used

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  • Dynamic tensile experimental device for detecting mechanical performance and microstructure of high polymer fiber on line
  • Dynamic tensile experimental device for detecting mechanical performance and microstructure of high polymer fiber on line
  • Dynamic tensile experimental device for detecting mechanical performance and microstructure of high polymer fiber on line

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Experimental program
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Effect test

Embodiment 1

[0019] In this embodiment, a dynamic tensile test device for on-line detection of the mechanical properties and microstructure of polymer fibers is mainly composed of a stretcher, an X-ray diffractometer and a sample fixing device. Both the sample fixing device and the extensometer are fixed in the X-ray diffractometer, and the sample fixing device is located on the diffraction optical path of the X-ray diffractometer.

[0020] Wherein, the sample fixing device is composed of a sample box 8 and a sample box cover plate 12 to form a hollow square cylindrical cylinder; the middle part of the cylinder is a through hole 9; the middle part of the cylinder is a through hole 9; Stretch rod sliding positioning groove 10; Stretch rod 4 is installed in the stretch rod sliding positioning groove 10, is connected to the stretching jig of extensometer for the stretch rod 4 that is exposed outside sample box 8; Stretch rod 4 The number is 2, and the opposite position of the two stretching r...

Embodiment 2

[0022] The difference between this embodiment and Embodiment 1 is that a fixing screw 11 is provided on the sliding positioning groove 10 of the stretching rod; by loosening one or two fixing screws, one-way or two-way stretching can be performed on the fiber bundle sample. operate.

Embodiment 3

[0024] The difference between this embodiment and embodiment 1 is that a vapor chamber 5 is installed at the bottom of the sample box 8; 7 is connected to the electric temperature control instrument; when the vapor chamber 5 is installed, the upper surface of the vapor chamber 5 must be in contact with the plane composed of the high polymer fiber bundle 1, the fiber bundle transfer fixture 2 and the stretch rod 4 and can slide each other; the temperature chamber 5 is preferably made of copper or aluminum material with good temperature uniformity.

[0025] In the above embodiments, the X-ray diffractometer equipped with a two-dimensional detector is selected, and its diffraction detection range is not less than 60 degrees, and the angular separation rate of diffraction lines is not less than 0.04 degrees.

[0026] The high polymer fiber tensile test device is applicable to fiber monofilaments and fiber bundles. In order to be able to connect with the X-ray diffractometer, the ...

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Abstract

The invention discloses a dynamic tensile experimental device for detecting the mechanical performance and the microstructure of high polymer fiber on line, and belongs to the technical field of material structure and performance analysis and detection. The device mainly comprises a tensile instrument, an X-ray diffractometer and a sample fixing device. The device is connected with the X-ray diffractometer through the sample fixing device and the tensile instrument to detect a change rule of mechanical parameters such as the stress and the strain in a stretching process of the high polymer fiber and synchronously realize dynamic in-situ detection of structure parameters such as the degree of orientation of the fiber, the crystallinity, the grain size and a cell parameter. Such a detection experimental device and online detection technology can be applied to production and scientific and research activities of optimizing the microstructure of the high polymer fiber, analyzing a fracture failure mechanism of the high polymer fiber and the like by improving a production process.

Description

technical field [0001] The invention belongs to the technical field of material structure performance analysis and detection. Background technique [0002] At present, advanced polymer fibers such as carbon fiber, Kevlar, high-strength polyethylene, and polyetheretherketone are widely used in aerospace and other military equipment and civilian products. During the production process of these fiber materials, the structure is often improved by stretching operations to improve the mechanical properties of the fibers. The damage and failure of fiber products are closely related to the structural deterioration caused by the overload of external load. For this reason, the discussion of the positive and negative effects of external stress on the structure of materials has always been an important topic in the research of polymer fibers. However, there is currently a lack of a dynamic tensile experimental device that can be used for on-line detection of polymer fiber mechanical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0003G01N2203/0017G01N2203/0075G01N2203/0641
Inventor 高忠民唐海通吕光锐李向山
Owner JILIN UNIV
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