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Testing method of woven composite material blade

A technology of composite materials and testing methods, which is applied in the direction of testing the strength of materials by applying a stable bending force, which can solve the problems of different structures and the inability to measure the compressive properties of woven composite material blades.

Pending Publication Date: 2022-07-08
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors have found that there are at least the following problems in the prior art: the uniaxial compression test cannot measure the compression performance of the formed woven composite blade, because the structure of the standard test piece manufactured according to the uniaxial compression test requirements is different from the actual blade structure Are not the same

Method used

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  • Testing method of woven composite material blade
  • Testing method of woven composite material blade
  • Testing method of woven composite material blade

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Embodiment Construction

[0036] Combine below Figure 1 to Figure 6 The technical solutions provided by the present invention are described in more detail.

[0037] The embodiment of the present invention provides a testing method for a woven composite material blade, which is used for testing an actual woven composite material blade 1 . The method includes the following steps:

[0038] Step S100 , setting a target area on the woven composite material blade 1 .

[0039] The woven composite blade 1 is an actual manufactured blade to be used on an aeroengine. It is not a sample manufactured for testing, so the woven composite blade 1 can reflect all the structural characteristics of the blade, and can reflect the compressive performance of the woven composite material caused by the blade profile distortion, thickness and other structural characteristics during the manufacturing process. Impact. It can be seen that the woven composite material blade 1 can be used to test its compression performance u...

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Abstract

The invention discloses a method for testing a woven composite material blade, relates to the field of aero-engine blade testing, and is used for testing the compression performance of the woven composite material blade. The method comprises the following steps: setting a target area on the woven composite material blade; sampling from the target area to obtain a sample; loading the sample by adopting a four-point bending test device; acquiring first bending test data of the sample; establishing a finite element model of the sample; applying boundary conditions to the finite element model according to a four-point bending test; calculating second bending test data of the finite element model according to the rigidity of the finite element model; when the difference value between the first bending test data and the second bending test data is smaller than a set value, extracting the compression stiffness of the finite element model and the maximum compression stress corresponding to the maximum load; the maximum compression stress in the finite element model is the compression strength of the sample, and the ratio of the maximum compression stress to the maximum compression strain in the finite element model is the compression modulus of the sample.

Description

technical field [0001] The invention relates to the field of aero-engine blade testing, in particular to a testing method for woven composite material blades. Background technique [0002] Blades are an important part of aero-engines. Due to the light weight of woven composite materials, as the improvement direction of aero-engines, woven composite blades have been used in some aero-engines. Woven composites are less rigid than metallic materials. In the process of bird impact on the woven composite fan blade, local compression failure occurs in the impact area of ​​the woven composite fan blade. When a bird swipes across a woven composite fan blade, the blade oscillates substantially along the thickness of the blade. At this time, the woven composite fan blades are prone to compression failure. In order to make the compressive strength performance of the woven composite blade meet the requirements, it needs to be tested for compressive strength. [0003] The uniaxial c...

Claims

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Application Information

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IPC IPC(8): G01N3/20
CPCG01N3/20G01N2203/0216G01N2203/0218G01N2203/0023
Inventor 时起珍王祯鑫覃文源
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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