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Strain foil and method of full-bridge type and half-bridge type measurement shearing strain

A strain gage, full bridge technology, applied in the field of strain gage and experimental stress analysis, can solve the problem of not being able to measure the shear strain of the measured point

Inactive Publication Date: 2013-05-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0002] Internet search shows that in the current "resistance strain test technology" in "experimental stress analysis", the resistance strain gauge is still mainly used to measure the strain of the component when it is under force, and the resistance strain gauge can only measure the strain along the strain gauge grid. The linear strain in the long direction cannot measure the shear strain of the measured point

Method used

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  • Strain foil and method of full-bridge type and half-bridge type measurement shearing strain
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  • Strain foil and method of full-bridge type and half-bridge type measurement shearing strain

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Embodiment Construction

[0013] Known by the resistance strain testing technology professional, the resistance strain gauge can only measure the linear strain, and to measure the shear strain γ, only the linear strain ε in three directions can be measured first. α1 ,ε α2 ,ε α3 , and then according to the strain analysis formula (1)

[0014] ϵ α 1 = ϵ x + ϵ y 2 + ϵ x - ϵ y ...

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Abstract

The invention relates to a strain foil and a method of full-bridge type and half-bridge type measurement shearing strain, and belongs to the technical field of 'experimental stress analysis'. The strain foil of the bridge type measurement shearing strain is provided with a 0-degree sensitive grid, a 90-degree sensitive grid, a first 45-degree sensitive grid and a second 45-degree sensitive grid. The strain foil of the half-bridge type measurement shearing strain is provided with a 135-degree sensitive grid and a 45-degree sensitive grid. By means of the strain foil and the method of the full-bridge type and the half-bridge type measurement shearing strain, manufacturing of shearing strain foils for shearing strain measurement can be conducted directly, and a novel testing means is added in the field of 'resistor strain tests' in the 'experimental stress analysis'.

Description

technical field [0001] The invention relates to a full-bridge and half-bridge strain gauge and a method for measuring shear strain, belonging to the technical field of "experimental stress analysis". Background technique [0002] Internet search shows that in the current "resistance strain test technology" in "experimental stress analysis", the resistance strain gauge is still mainly used to measure the strain of the component when it is under force, and the resistance strain gauge can only measure the strain along the strain gauge grid. The linear strain in the long direction cannot measure the shear strain of the measured point. Contents of the invention [0003] The purpose of the present invention is to complete the manufacture of shear strain gauges capable of directly measuring shear strain. Added new test means in the "Resistance Strain Test" field in "Experimental Stress Analysis". [0004] A full-bridge strain gauge for measuring shear strain, characterized in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
Inventor 徐鹿麟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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