A Method for Determining the Maximum Stress of Large Rotation Angle Circular Thin Film under Uniform Load

A technology of evenly distributed load and maximum stress, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problem that the lateral load q cannot be too large, achieve the effect of convenient design and application, and eliminate calculation errors
CN104749033BInactive Publication Date: 2017-07-21佛山市顺德区恒达美塑料制品有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
佛山市顺德区恒达美塑料制品有限公司
Publication Date
2017-07-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a determination method for maximum stress of a large-turning angle circular membrane under a uniformly distributed load. The determination method comprises the following steps of fixedly clamping a non-prestressed membrane of which the Young's elastic modulus is E, the Poisson's ratio is V and the thickness is h by using a clamping device of which the inner radius is a to form a circular membrane structure of which the radius is a and the periphery is fixedly clamped, and transversely applying the uniformly distributed load q to the circular membrane to enable a turning angle theta after the membrane deforms to be greater than 20 degrees, so based on the accurate analysis on the static balance problem of the axisymmetric circular membrane, by utilizing a load measured value q, the maximum stress sigmam generated after the membrane deforms can be determined.
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Description

technical field

[0001] The invention relates to a method for determining the maximum stress of a circular film with a large corner fixed and clamped around the periphery 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 The method for determining the maximum stress value of a prestressed circular film under a uniform load" (patent application number: 201410238396.3) uses the analytical solution of the prestressed ...

Claims

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