Photoelastic instrument used for observing and recording granular material bearing structure configuration and features

A load-carrying structure, photoelastic instrument technology, applied in the direction of instruments, analysis materials, etc., can solve problems such as difficult operation, large error of test data, etc.

Inactive Publication Date: 2016-12-14
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many drawbacks in the test data of the photoelasticity instrument for observing the structural characteristics of the force chain of the particle system, which are di...

Method used

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  • Photoelastic instrument used for observing and recording granular material bearing structure configuration and features
  • Photoelastic instrument used for observing and recording granular material bearing structure configuration and features
  • Photoelastic instrument used for observing and recording granular material bearing structure configuration and features

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Embodiment Construction

[0029] 1. An instrument based on the birefringence principle of light for real-time observation and recording of the load-bearing structure configuration and characteristics of the internal force chain of the particle system. It is characterized in that it includes photoelastic instruments a3, a4, a6, a7, a8, multi-directional loading system a5, data collection and display system a1, industrial camera a2, particle placement device ( figure 2 );

[0030] Among them, the multi-directional loading system ( image 3 ) is located between the front 1 / 4 wave plate a4 and the back 1 / 4 wave plate a6 of the photoelasticometer, and its multidirectional loading system ( image 3 ) coincides with the central axis of the geometric centers of the polarizers a4 and a6.

[0031] 2. An instrument for real-time observation and recording of the load-bearing structure configuration and characteristics of the internal force chain of the particle system based on the principle of light-based biref...

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Abstract

The invention relates to the field of precision measurement, in particular to a photic double refraction principle based instrument used for observing and recording bearing structure configuration and features of a force chain in a granular system in real time. Functions of a photoelastic device, a multi-way loading system, a data collection display system, an industrial camera and a granular placement instrument are integrated, compressing and shearing of granular materials can be observed, and the features of the contact force chain can be visually observed. The photoelastic instrument is simple in operation, multiple in loading mode, and the comprehensive function of visualizing and integrating displacement, force and photoelastic images is achieved.

Description

technical field [0001] The present invention relates to the field of precision measurement, specifically, it is used for particle compression and particle shear tests, and observes and records the internal contact force chain of the particle material during the loading process by changing the loading method, the particle size of the loaded particle, the friction coefficient and other parameters Distribution and change characteristics of the micro-loaded structural configuration and the evolution of the structural configuration of the force chain of the particle system with the shear process. Background technique [0002] The force chain is the most effective and non-destructive observation method for the force characteristics of the reactive particle system. By observing the compressed and sheared granular materials through the photoelastic system, the characteristics of the contact force chain can be intuitively observed. At present, there are many drawbacks in the test dat...

Claims

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Application Information

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IPC IPC(8): G01N15/00
CPCG01N15/00
Inventor 高政国李志常
Owner BEIHANG UNIV
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