Measuring method for friction distribution of inner wall of confining device

A measurement method and technology in the device, which are applied in the direction of measurement force, measurement device, instrument, etc., to achieve the effect of simple instrument and equipment, simple data acquisition and processing method, and reliable method

Inactive Publication Date: 2013-01-16
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, there is no literature disclosing the measurement method of the friction force distribution on the inner wall of the confining pressure device when the material in the confining pressure device is subjected to axial compression

Method used

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  • Measuring method for friction distribution of inner wall of confining device
  • Measuring method for friction distribution of inner wall of confining device
  • Measuring method for friction distribution of inner wall of confining device

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] A method for measuring the distribution of friction force on the inner wall of a confining pressure device, characterized in that it includes the following specific steps:

[0021] 1) Take two symmetrical parts on the outer surface of the confining pressure device, first use coarse emery cloth, then use fine emery cloth, and grind out a smooth band-shaped area with a width of 1cm to 2cm along the axial direction;

[0022] 2) Determine the number of required strain gauges according to the axial length of the confining pressure device, and stick the axial strain gauges in sequence along the axial direction in one of the smooth strip-shaped areas, with a certain distance between two adjacent strain gauges and record the distance from the center of each resistance strain gauge to the top of the confining pressure device, which are recorded ...

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Abstract

The invention discloses a measuring method for friction distribution of an inner wall of a confining device on a condition that materials in the confining device are subjected to axial compression. Strain of different measured points is acquired simultaneously by a static resistance strain indicator, B-spline fitting is carried out three times according to data of the different measured points by mathematical software of MATLAB (Matrix Laboratory) easily, and finally a friction distribution formula can be obtained by means of elasticity mechanic analysis. The measuring method has simple form and is reliable.

Description

technical field [0001] The invention relates to a method for measuring the distribution of friction force on the inner wall of a device, in particular to a method for measuring the distribution of friction force on the inner wall of a confining pressure device. Background technique [0002] In order to improve the comprehensive mechanical properties of certain materials, a confining pressure device is usually added to its periphery. This technology is widely used in engineering. For example, after adding confining pressure devices on the periphery of concrete materials, the comprehensive mechanical properties of concrete materials (called confining pressure concrete in engineering) will be significantly improved. The material of the confining pressure device can be metal, alloy and polymer composite material. When the material is subjected to axial compression, the distribution of friction force on the inner wall of the confining pressure device has great practical signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
Inventor 褚洪岩陈建康欧阳韡怡施德胜吴晓烽
Owner NINGBO UNIV
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