Manufacturing method of speckles for deformation measurement

Abstract

The invention relates to a manufacturing method of speckles for deformation measurement. The surfaces of samples are etched through tiny laser beams, the speckles can still be firmly attached to the surfaces of metal, ceramic and composites at a high temperature, the artificial speckles, used as loyal carriers of deformation information of the measured sample, on the surfaces deform together with the surfaces of the samples, and the ideal deformation information carriers are provided for measuring the high-temperature deformation of the surfaces of materials through a digital image correlation method. The applicable temperature of the artificial speckles ranges from -100 DEG C to 2000 DEG C, and the applicable temperature range of the artificial speckles is theoretically equivalent to the temperature range capable of being borne by materials.

Description

technical field [0001] The invention relates to the field of photomechanics, in particular to a speckle fabrication method suitable for deformation measurement in a normal temperature or high temperature environment. Background technique [0002] With the development of new high-temperature materials and their continuous utilization in many industries, research on high-temperature materials has become a research trend in many countries. The mechanical properties, deformation states and failure mechanisms of materials and structures in high-temperature environments have increasingly attracted the attention of researchers. In engineering fields such as aerospace materials, components in aero-engines, high-pressure steam boilers, steam turbines, and chemical oil refining equipment, the problem of high-temperature mechanics has always been a broad, prominent and inevitable problem. Therefore, the development of deformation measurement under high temperature conditions is bound t...

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Problems solved by technology

[0005] The present invention aims at the failure problem of existing speckle fabrication for deformation measurement under high temperature and ultra-high temperature conditions. Speckle can still be firmly attached to the surface of metals, ceramics and composite materials. As a faithful carrier of the deformation information of the tested sample, the artificial speckle on the surface deforms along with the surface of the sample. It is a digital image correlation method for measuring the high temperature of the surface of these materials. Deformation provides an ideal deformation information carrier. The applicable temperature range of the artificial speckle is from -100°C to 2000°C. Theoretically, the applicable temperature range of the artificial speckle is equivalent to the temperature range that the material can withstand

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