Ultraviolet Single-Camera Stereo-Digital Image Correlation for Deformation Measurement up to 2600 °C

Background In the mechanical testing of high-temperature structural materials, ultra-high temperature deformation measurement is very necessary and very challenging. Objective To overcome the challenge of using single-camera stereo-digital image correlation (stereo-DIC) for ultra-high-temperature me...

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Bibliographic Details
Published in:Experimental mechanics 2024-10, Vol.64 (8), p.1343-1355
Main Authors: Luo, Y. X., Dong, Y. L., Yang, F. Q., Lu, X. Y.
Format: Article
Language:English
Subjects:
Bandpass filters
Biomedical Engineering and Bioengineering
Cameras
Characterization and Evaluation of Materials
Composite materials
Control
Deformation
Deformation effects
Digital imaging
Dynamical Systems
Effectiveness
Elastic deformation
Engineering
Extensometers
High temperature
Lasers
Mechanical tests
Modulus of elasticity
Optical Devices
Optics
Photonics
Radiation tolerance
Reflectors
Research Paper
Solid Mechanics
Speckle patterns
Strain
Temperature measurement
Tensile tests
Thermal radiation
Thermal resistance
Ultrahigh temperature
Ultraviolet radiation
Vibration
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Summary:Background In the mechanical testing of high-temperature structural materials, ultra-high temperature deformation measurement is very necessary and very challenging. Objective To overcome the challenge of using single-camera stereo-digital image correlation (stereo-DIC) for ultra-high-temperature measurement. Methods An ultraviolet single-camera stereo-DIC system combining active UV illuminations, an ultraviolet camera, a single UV narrow bandpass filter, a reflective prism and two reflectors was established. In addition, two types of high temperature speckle patterns were prepared A tensile test of C/C composites at 2600 °C was conducted to verify the effectiveness and accuracy of the developed technology. Results The ultraviolet single-camera stereo-DIC system has excellent resistance to thermal radiation. As well, the two types of speckle patterns are available at 2600 °C. And the values of elastic modulus calculated by the developed technology and high-temperature extensometer are very close to each other, and the relative errors are less than 7%. Conclusions The well matched strain results with high-temperature extensometer data demonstrates that the ultraviolet single-camera stereo-DIC is an effective ultra-high temperature deformation measurement technology and has great potential in characterizing the deformation response of materials at ultra-high temperatures.
ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-024-01087-5