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Glass photoelastic constant measuring device and measuring method

A measuring device and glass technology, applied in the measuring device, using a stable bending force to test the strength of the material, and using a stable tension/pressure to test the strength of the material, etc. Measurement, large thickness range, and the effect of improving measurement accuracy

Pending Publication Date: 2021-04-09
CHINA TEST & CERTIFICATION INT GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In order to solve the above technical problems, the present invention provides a glass photoelastic constant measurement device and measurement method. The present invention can effectively solve the measurement of the photoelastic constant of glass samples with a thickness of 1.1mm and above, and solve the problem that thin glass cannot be detected in the past, and Fast measurement with high precision

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  • Glass photoelastic constant measuring device and measuring method
  • Glass photoelastic constant measuring device and measuring method
  • Glass photoelastic constant measuring device and measuring method

Examples

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example 1

[0061] Take soda-lime transparent glass without bubbles, streaks, and obvious stress defects, prepare the glass into a glass sample with a size of 10mm*10mm*30mm, polish each side, and then anneal the glass sample at 550°C deal with. After annealing, the glass sample is placed on the pressure loading system of the glass photoelastic constant measuring device, and the Shore hardness of the buffer gasket is selected as 60HRC. Start the computer software, set the light source parameter to 450nm, and set the pressure loading range to 0-600N; the software automatically controls the pressure loading and phase difference image capture, and fits the phase difference and pressure curve as figure 2 As shown, after data processing, the photoelastic constant of the glass material is 26.40nm / cm / MPa.

example 2

[0063] Take the soda-lime transparent glass with the same material as Example 1 without air bubbles, streaks, and obvious stress defects, and prepare the glass into a glass sample with a size of 5mm*5mm*30mm. The samples were annealed at 550°C. After annealing, the glass sample is placed on the pressure loading system of the glass photoelastic constant measuring device, and the Shore hardness of the buffer gasket is selected as 100HRC. Start the computer software, set the light source parameter to 630nm, set the pressure loading range to 0-250N, the software automatically controls the pressure loading and phase difference image capture, and fits the phase difference and pressure curve as image 3 As shown, after data processing, the photoelastic constant of the glass material is 26.43nm / cm / MPa.

example 3

[0065] Take the soda-lime transparent glass with the same material as Example 1 without air bubbles, streaks, and obvious stress defects, and prepare the glass into a glass sample with a size of 10mm*1.1mm*20mm. The samples were annealed at 550°C. After annealing, the glass sample is placed on the pressure loading system of the glass photoelastic constant measuring device, and the Shore hardness of the buffer gasket is selected as 80HRC. Start the computer software, set the light source parameter to 590nm, set the pressure loading range to 0-45N, the software automatically controls the pressure loading and phase difference image capture, and fits the optical path difference and pressure curve as Figure 4 As shown, after data processing, the photoelastic constant of the glass material is 26.41nm / cm / MPa.

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Abstract

The invention discloses a glass photoelastic constant measuring device and method, and belongs to the technical field of glass photoelastic constant measurement. The device comprises a lightproof shell and a computer; a pressure loading system for providing pressure in the vertical direction, a light source, a light path modulation system and a phase difference acquisition camera are arranged in the lightproof shell, and the pressure loading system and the phase difference acquisition camera are in data connection with the computer; the light source and the phase difference acquisition camera are respectively arranged on two sides of the pressure loading system, and the light path modulation system is arranged between the light source and the pressure loading system; the pressure loading system comprises a workbench and a sliding block located above the workbench, and the workbench and the sliding block are each provided with a buffer gasket used for making contact with the lower surface and the upper surface of a glass sample. The photoelastic constant of a glass sample with the thickness of 1.1 mm or above can be effectively measured, the problem that sheet glass cannot be detected in the past is solved, measurement is rapid, and the precision is high.

Description

technical field [0001] The invention relates to the field of measuring the photoelastic constant of glass, in particular to a measuring device and method for the photoelastic constant of glass. Background technique [0002] The photoelastic constant, also known as the stress optical constant, is a key parameter for stress measurement of glass or other transparent amorphous materials, and is of great significance to the precise measurement and calculation of product residual stress, structural stress, and mechanical stress. Before introducing the photoelastic constant, we must first understand the measurement principle of glass stress. Stress is an important detection item for glass materials, and it is of great significance to the evaluation of key areas such as quality control of material products, mechanical performance evaluation, and failure analysis. There are many factors that lead to stress in glass materials, such as thermal stress caused by uneven annealing, structu...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/04G01N3/06G01N3/08G01N3/20
CPCG01N3/02G01N3/04G01N3/068G01N3/08G01N3/20
Inventor 李俊杰韩松邱岩苗向阳丁佐鑫杨平平许威张京玲左辉霞
Owner CHINA TEST & CERTIFICATION INT GRP CO LTD
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