Device and method for testing moisture expansion coefficient of composite material under moisture supplementing condition

A technology of moisture expansion coefficient and composite materials, which is applied in the direction of measuring devices, analyzing materials, and using material absorption and weighing, etc., can solve the problem of low test accuracy of moisture expansion coefficient, so as to facilitate analysis and research, reduce test time, and meet engineering requirements. Effects of Design Use Requirements

Active Publication Date: 2019-12-20
HARBIN INST OF TECH
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Problems solved by technology

[0005] The present invention aims to solve the problem of low test accuracy of the moisture expansion coefficient of composite materials in the prior art to a certain extent

Method used

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  • Device and method for testing moisture expansion coefficient of composite material under moisture supplementing condition
  • Device and method for testing moisture expansion coefficient of composite material under moisture supplementing condition
  • Device and method for testing moisture expansion coefficient of composite material under moisture supplementing condition

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Embodiment Construction

[0034] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0035] In addition, the positional relationship of "upper", "lower", "left", "right", "front", "rear", "top" and "bottom" of each structural member mentioned below is only for It is for ease of description and simplification of description, but does not indicate or imply that the referred device must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. The meanings...

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Abstract

The invention provides a device and a method for testing a moisture expansion coefficient of a composite material under a moisture supplementing condition. The testing device comprises a vacuum tank,and a quartz test piece, a humidity sensor, a temperature sensor, an air pressure sensor, a displacement sensor and a load sensor which are arranged in the vacuum tank, wherein the vacuum tank comprises a first test chamber, an environment chamber and a second test chamber which are sequentially connected from top to bottom; the quartz test piece is fixedly connected with the first test chamber, and overhangs and penetrates through the environment chamber and the second test chamber; the first test chamber, the environment chamber and the second test chamber are communicated by means of the quartz test piece, and the quartz test piece is detachably connected with a sample in the environment chamber; and the load sensor is used for testing the mass change of the sample, and the displacementsensor is used for testing the length change of the sample. According to the testing device and the testing method provided by the invention, dynamic measurement of the mass and length changes in themoisture supplementing process under any constant humidity condition from 0% to 95% can be realized.

Description

technical field [0001] The invention relates to the field of performance testing of composite materials, in particular to a device and method for testing the coefficient of moisture expansion of composite materials under humidified conditions. Background technique [0002] Fiber-reinforced resin-based composites have become important materials in aerospace vehicle structures due to their high specific strength and specific stiffness, good designability and fatigue fracture resistance. At present, the general environmental conditions for the manufacture and assembly of domestic aerospace composite materials are: temperature 20-25 ℃, humidity ≤ 75%, while in the southern region, the humidity in the rainy season is often above 85%, or even 90%. Such a large range of humidity changes, Composite components are stored on the ground, including molding, assembly, and testing processes. Due to the polymer structure of the composite resin matrix and the existence of pores and air bubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N33/00
CPCG01N5/02G01N33/00G01N2033/0003
Inventor 耿洪滨耿晨曦张翰兴吕钢李兴冀李红
Owner HARBIN INST OF TECH
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