DIC weld dynamic strain measurement based high-temperature speckle preparation method

A dynamic strain and speckle technology, applied in the field of mechanical and optical testing, can solve the problems of large impact, difficult to guarantee the quality of speckle, easy to fall off of speckle, etc., to achieve easy control of density, easy control of speckle quality, and low cost Effect

Active Publication Date: 2015-07-15
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The speckles prepared by this method are relatively easy to fall off, and are greatly affected by the external environment during use, which will be subject to certain restrictions in practical applications.
[0005] To sum up, among the existing high-temperature-resistant speckle preparation methods, som

Method used

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  • DIC weld dynamic strain measurement based high-temperature speckle preparation method

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preparation example Construction

[0025] The high-temperature speckle preparation method based on DIC welding dynamic strain test adopts the following steps:

[0026] 1. Cut the base material into the desired shape, perform grinding and polishing treatment, use absolute ethanol to clean the surface of the base material, and dry;

[0027] 2. Prepare watch glasses, glass rods, small flat spatulas, medicine spoons, two-component aluminosilicate materials, and white high-temperature-resistant powder materials;

[0028] 3. In a watch glass, according to the solid-liquid ratio of 0.5 ~ 1.0g: 1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0029] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place it on the surface of the base material, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0030] 5. Use a medicine spoon to take an appropriate...

Embodiment 1

[0035] The base material is aluminum alloy with a size of 75mm×25mm×1.5mm. The process of preparing high temperature resistant speckle on the aluminum alloy surface is as follows:

[0036] 1. Take two pieces of the aluminum alloy, use absolute ethanol to clean the surface of the aluminum alloy, and dry;

[0037] 2. Prepare watch glass, glass rod, small flat spatula, medicine spoon, two-component aluminosilicate material, neutral alumina (100-200 mesh), neutral alumina (200-300 mesh);

[0038] 3. In a watch glass, according to the solid-liquid ratio of 0.7g:1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0039] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place them on the surfaces of two aluminum alloys, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0040] 5. Use a medicine spoon to take an ap...

Embodiment 2

[0044] The base material is a copper plate with a size of 50mm×50mm×2.0mm. The specific steps for preparing high-temperature-resistant speckles on the surface of the copper plate are as follows:

[0045] 1. Take three pieces of the copper plate, grind and polish them, use absolute ethanol to clean the surface of the copper plate, and dry;

[0046]2. Prepare watch glass, glass rod, small flat spatula, medicine spoon, two-component aluminosilicate material, neutral alumina (200-300 mesh);

[0047] 3. In a watch glass, according to the solid-liquid ratio of 0.7g: 1mL, prepare the two-component aluminosilicate material into a paste-like high-temperature-resistant glue;

[0048] 4. Use a small flat shovel to take an appropriate amount of high-temperature-resistant glue and place them on the surfaces of the three copper plates, and use a small flat shovel to evenly coat the high-temperature glue into a thin layer with a thickness of 0.1-0.2mm;

[0049] 5. Use a medicine spoon to ta...

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Abstract

The invention relates to a DIC weld dynamic strain measurement based high-temperature speckle preparation method. The DIC weld dynamic strain measurement based high-temperature speckle preparation method comprises the following steps: preparing a double-component aluminosilicate into pasty high-temperature resistant glue; grinding, polishing, coating the surface of a substrate material cleaned by alcohol with the high-temperature-resistant glue, then scattering a layer of evenly distributed high-temperature-resistant particles on the high-temperature-resistant glue, and modifying the surface of the substrate material; curing the high-temperature-resistant glue, and thus preparing high-temperature-resistant speckles on the surface of the substrate material. Compared with the prior art, the speckles obtained by the method can resist temperature of around 800 DEG C; the preparation method is especially suitable for the measurement of digital images of weld dynamic strain and also can be applied to the measurement of mechanical performance under the conditions of material stretching, crack damage and the like at high-temperature environment, is novel in concept, is simple to operate, is low in preparation cost, and has wide application prospect in the high-temperature optical measurement mechanical performance.

Description

technical field [0001] The invention relates to the technical fields of optical testing and mechanics, in particular to a high-temperature speckle preparation method based on DIC welding dynamic strain testing. Background technique [0002] In recent years, the characterization of the mechanical behavior of materials in high temperature environments has become a matter of great concern in the fields of material processing, experimental solid mechanics and materials science, especially the measurement of dynamic stress and strain of materials during welding. Real-time measurement of the mechanical behavior of materials in high-temperature environments is of great significance to the evolution of material properties, reliability assessment, and life prediction. Because traditional contact methods are affected by temperature, it is difficult to effectively measure the displacement of materials or structural surfaces in high-temperature environments, so non-contact methods play ...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 徐济进林烈雄陆皓余春陈俊梅陈捷狮
Owner SHANGHAI JIAO TONG UNIV
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