Micro-scale speckle manufacturing method for interface high-temperature deformation measurement

A technology of high temperature deformation and production method, which is applied in the direction of measuring device, optical device, instrument, etc., to achieve the effect of simple process and low production cost

Inactive Publication Date: 2012-09-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a micro-scale speckle manufacturing method for interface high-temperature deformation measurement to solve how to measure the thermal deformation field of the interface region of the high-temperature-resistant composite material under thermal shock while improving the accuracy

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  • Micro-scale speckle manufacturing method for interface high-temperature deformation measurement
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  • Micro-scale speckle manufacturing method for interface high-temperature deformation measurement

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings, but it is not intended to limit the present invention.

[0033] Such as figure 1 As shown, it is a micro-scale speckle manufacturing method for interface high-temperature deformation measurement described in the embodiment of the present invention. The method includes the following steps:

[0034] In step 101, two high-temperature-resistant micro-nanoparticle powders with high black-and-white color contrast are selected.

[0035] The further step 101 is specifically: according to the optimal speckle size and the size corresponding to each pixel under the microscope magnification, obtain the corresponding relationship curve between the particle size of the high temperature resistant powder and the magnification, and then according to the observed magnification of the test piece, Using the corresponding relationship curve to select two kinds of micro-nano parti...

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Abstract

The invention discloses a micro-scale speckle manufacturing method for interface high-temperature deformation measurement, comprising the following steps of: selecting two types of high-temperature-resisting powder with a great black and white color difference; respectively mixing an ethanol solution with the two types of the high-temperature-resisting powder according to a mass/volume ratio of 1: (0.1-0.15) (g/ml) and putting into two spraying bottles; utilizing an ultrasonic washing machine to carry out dispersion treatment on the solutions in the spraying bottles; polishing a surface to be detected by sand paper; utilizing a butane flame spraying gun to heat to be about 60 DEG C; utilizing the spraying bottles to alternately spray the two types of the uniformly-mixed solutions on the surface to be detected; utilizing a draught fan to blow off unstable grains attached in the solutions to form random speckles; utilizing a microscope lens and matching an optical filtering technology capable of eliminating black body radiation influences to collect speckle images at a room temperature and a high temperature; and carrying out related coefficient calculation on the speckle images and finishing the manufacturing of the speckle images when the related coefficient is more than or equal to 0.98. The micro-scale speckle manufacturing method for the interface high-temperature deformation measurement can improve the precision and can measure a thermal deformation field of high-temperature-resisting composite materials of an interface region under thermal shock.

Description

technical field [0001] The invention belongs to the technical field of photomechanics, engineering materials, component deformation and displacement testing, and in particular relates to a method for making micro-scale high-temperature-resistant speckles that can be used for interface high-temperature thermal shock deformation measurement. Background technique [0002] Under the action of high temperature thermal shock, due to the thermal expansion coefficient mismatch between the layers of the material or the temperature gradient inside the material, the high temperature resistant composite material will generate thermal mismatch stress inside the material. When the thermal mismatch stress reaches a certain value, it may Cause material damage, such as delamination, fracture, etc. It is of great significance to study the performance of high temperature resistant composite materials by experimental means to measure the thermal deformation field of the interface region of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 刘战伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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