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Fabric thickness directional permeability testing device and testing method

A technology of fiber fabric and thickness direction, which is applied in the field of material testing, and can solve problems such as the unevenness of the permeability of fiber preforms

Active Publication Date: 2012-11-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, infiltration defects such as dry spots and pores often appear in its products, and their formation is closely related to the inhomogeneity of the permeability of the fiber preform

Method used

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  • Fabric thickness directional permeability testing device and testing method
  • Fabric thickness directional permeability testing device and testing method

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] The device for testing the permeability in the thickness direction of the fiber fabric of this embodiment includes an upper mold 1, a lower mold 2, and a mold cavity thickness support 3; the lower mold 2 is provided with a groove 7, and a sieve plate type flow divider is placed in the groove 7 8; The mold cavity thickness bracket 3 is compressed between the upper mold 1 and the lower mold 2 . The fiber fabric 4 is placed in the mold cavity surrounded by the mold cavity thickness support 3 and covered on the sieve plate type flow divider 8. The fiber fabric thickness direction permeability testing device also includes an injection port 5 and an overflow port 6, and the injection port 5 is connected with the fluid injection device, and the overflow port 6 is connected with the fluid collection and metering device. The injection port 5 is arranged o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a fabric thickness directional permeability testing device. The fabric thickness directional permeability testing device comprises an upper die, a lower die and a die cavity thickness support. The invention also discloses a testing method of a fabric thickness directional permeability. The method comprises the following steps of: a preparation step before injection; an injection step; and a step of measuring test data, and calculating the permeability. According to the invention, the influence of multilevel structure, multiple type unit cells and arrangement and combination manners of a prefabricated part on the spatial distribution of the prefabricated part permeability is analyzed, and a mathematical model of the correlation between the permeability and the distribution thereof and structure can be constructed, the forming mechanism and rule of the soakage defect of the composite material are revealed, and a criteria and a control method for the formation of the soakage defect are developed, so that the application and popularization of the composite material in the fields such as spaceflight and aerospace, automobile, building and wind power generation in China are promoted.

Description

technical field [0001] The invention relates to the field of material testing, in particular to a testing device and testing method for the permeability in the thickness direction of a fiber fabric. Background technique [0002] Under the background of the national major project of "Large Aircraft" and the development trend of "composite structure and function" in material technology, liquid molding of composite materials has attracted much attention because of its integrated, low-cost, and net-size structural parts manufacturing characteristics. However, infiltration defects such as dry spots and pores often appear in its products, and their formation is closely related to the inhomogeneity of the permeability of the fiber preform. Therefore, it is a key problem to be solved urgently to construct a correlation model between prefabricated component permeability and its distribution and multi-level structural parameters, and then accurately predict the wetting defects of comp...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 贾玉玺孙筱辰王照静董抒华
Owner SHANDONG UNIV
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