A Method for Determining the Maximum Deflection of Large Corner Round Thin Films under Uniform Loads

A technology of uniform load and maximum deflection, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of determining the maximum deflection of the round film, the transverse load q cannot be too large, and the design and application of precision measuring instruments cannot be used. , to achieve the effect of eliminating calculation errors and convenient design and application

Active Publication Date: 2017-08-25
太湖县市场监督检验所(太湖县功能膜检测研究院)
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Problems solved by technology

Generally speaking, the error of the precision measuring instrument itself is usually expected to be less than 3%. In this way, the existing method based on the assumption of a small film rotation angle cannot be used to determine the maximum deflection of a circular film when the rotation angle θ is greater than 20°, so it cannot Design applications for precision measuring instruments!
[0004]

Method used

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  • A Method for Determining the Maximum Deflection of Large Corner Round Thin Films under Uniform Loads
  • A Method for Determining the Maximum Deflection of Large Corner Round Thin Films under Uniform Loads
  • A Method for Determining the Maximum Deflection of Large Corner Round Thin Films under Uniform Loads

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[0017] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0018] like figure 1 As shown, use a clamping device with an inner radius a=20mm to fix and clamp the rubber film without prestress with Young's elastic modulus E=7.84MPa, Poisson's ratio ν=0.47, and thickness h=0.06mm to form A circular film structure with a radius a=20mm fixed and clamped around the periphery, applies a uniform load q to the circular film laterally, and allows the applied uniform load q to slowly increase from 0.01MPa to 0.1MPa, using the method provided by the present invention method, the maximum deflection w of the circular rubber film under the action of transverse uniform load q can be determined m ,As shown in Table 1.

[0019] In table 1, the data of rotation angle θ is the film rotation angle value (degree) at r=10mm place, in addition, in order to reflect the error that adopts the small rotation angle hypothesis of fil...

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Abstract

The invention discloses a method for determining the maximum deflection of a large-angle circular film under a uniform load: using a clamping device with an inner radius of , the Young's modulus of elasticity is , Poisson's ratio is The film is fixed and clamped to form a circular film structure with a radius of , and a uniform load is applied to the circular film in the transverse direction, so that the corner of the film after deformation is greater than 20o, then based on this axisymmetric circular film static An accurate analysis of the force balance problem, using the load measurements, allows the determination of the maximum deflection wm after deformation of the membrane.

Description

technical field [0001] The invention relates to a method for determining the maximum deflection of a circular film with a large corner fixed and clamped around it under the action of a uniformly distributed load. Background technique [0002] The circular thin-film structure has applications in many technical fields, such as the design of diaphragm instruments and meters, and the testing of the mechanical properties of thin-film / base-layer systems, etc. However, so far, the analytical solutions to the static force balance problem of a circular membrane fixed and clamped around the periphery under the action of a uniform load have been obtained under the assumption that the membrane rotation angle is small. For example, the applicant's previously declared invention patent "a Method for determining the maximum deflection value of prestressed circular membrane under uniform load" (Patent Application No.: 201410238568.7) The analytical solution of the prestressed circular membra...

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Application Information

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IPC IPC(8): G01N3/08
Inventor 孙俊贻何晓婷练永盛郑周练蔡珍红杨鹏杨志欣
Owner 太湖县市场监督检验所(太湖县功能膜检测研究院)
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