Sample preparation method for mechanical performance testing of pre-oxidized fibers

A pre-oxidized fiber and mechanical technology, which is applied in the field of sample preparation for testing the mechanical properties of pre-oxidized fibers, can solve the problems of cumbersome sample preparation methods, inability to guarantee the accuracy of test results, etc., and achieve the effect of improving efficiency.

Inactive Publication Date: 2010-12-22
JIANGSU HANGKE COMPOSITE MATERIALS TECH
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  • Abstract
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Problems solved by technology

[0004] In order to solve the technical problems that the existing sample preparation method for pre-oxidized fiber mechanical property test is cumbersome and cannot guarantee the accuracy of test results, the present invention provides a sample preparation method for pre-oxidized fiber mechanical property test

Method used

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  • Sample preparation method for mechanical performance testing of pre-oxidized fibers
  • Sample preparation method for mechanical performance testing of pre-oxidized fibers

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Embodiment Construction

[0022] The invention provides a sample preparation method for testing the mechanical properties of pre-oxidized fibers, the specific method is as follows:

[0023] 1) Wrap the pre-oxidized fiber to be tested on a rectangular bracket welded by stainless steel tubes with a constant tension. The rectangular bracket is welded by two bottom rods and two support rod ends, as shown in figure 1 As shown, the two ends of the pre-oxidized fiber to be tested need to be fixed on the bottom rod of the bracket with medical adhesive tape; it is required to be wound at least 5 times. The diameter of the stainless steel pipe is generally 3 mm to 10 mm, preferably 5 mm to 8 mm. In order to strengthen the stability between the two support rods, a reinforcing rod 3 parallel to the lower rod is arranged between the two support rods.

[0024] 2) Put the bracket wound with the pre-oxidized fiber to be tested into a rectangular plate with a cover welded by a stainless steel plate filled with epoxy r...

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Abstract

The invention relates to a sample preparation method for mechanical performance testing of pre-oxidized fibers, comprising the following steps: 1) winding the fibers to be tested on a support with certain tension, wherein the support comprises two bottom bars and two support bars vertically arranged between the two bottom bars; the fibers to be tested are wound between the bottom bars; and the two ends to be tested are respectively fixed on the bottom bars; 2) placing the support on which the fibers to be tested are wound in a container with epoxy resin glue solution, impregnating the fibers to be tested in the epoxy resin glue solution wholly for 1-8min, taking out the fibers and gently oscillating the support; 3) drying the fibers to be tested after being impregnated in the glue; and 4) cooling the dried fibers to be tested and cutting off the carbon fibers to be tested between the two bottom bars, thus obtaining the prepared sample. The method solves the technical problem that the existing sample preparation methods are complex and can not ensure the accuracy of the testing result and improves the efficiency of sample preparation for mechanical performance testing of pre-oxidized fibers and uniformity of sample impregnation.

Description

technical field [0001] The invention belongs to the technical field of material testing, and in particular relates to a sample preparation method for testing the mechanical properties of pre-oxidized fibers. Background technique [0002] Carbon fiber is a new type of carbon material that emerged in the 1960s. It has high specific strength, high specific modulus, high electrical and thermal conductivity, low thermal expansion coefficient, low density, high temperature resistance, fatigue resistance, creep resistance, and self-improvement. A series of excellent properties such as lubrication, it is an ideal functional material and structural material, widely used in aerospace, civil aviation, cultural and sports, transportation and other fields, and has broad application prospects. [0003] The preparation of carbon fiber includes three major processes: spinning, pre-oxidation, and carbonization. Among them, the pre-oxidation of the precursor is the key process that affects th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N3/00
Inventor 王浩静刘福杰范立东程璐王红飞庞培东
Owner JIANGSU HANGKE COMPOSITE MATERIALS TECH
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