THERMAL STRAIN MEASUREMENT OF A DOUBLE RING STRUCTURE USING DIGITAL IMAGE CORRELATION METHOD

2011 ◽  
Vol 25 (31) ◽  
pp. 4269-4272
Author(s):  
TAILIE JIN ◽  
NAM SEO GOO
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Thermal Deformation ◽  
Thermal Strain ◽  
Correlation Method ◽  
Ring Structure ◽  
Image Correlation ◽  
Full Field ◽  
Double Ring ◽  
Thermal Output

Thermal output is a large error source in the thermal deformation measurement of specimens under temperature change when a strain gage is used. Although several methods have been developed and used to compensate thermal output, the range of measuring temperature is limited to several hundred degrees C. In this study, we used a digital image correlation (DIC) method to measure the full-field thermal deformation and strain of a double ring structure consisting of an inner aluminum ring and an outer titanium ring. Thermal deformation of the ring was measured up to 200 degrees C, and a finite element simulation for the heating condition of the double ring structure was performed. The deformation and strain results from the DIC method and simulation were in good agreement.

The Stress Intensity Factor of Opening Mode Determined by Digital Image Correlation

2011 ◽  
Vol 83 ◽  
pp. 54-59 ◽  
Author(s):  
Rui Zhang ◽  
Ling Feng He ◽  
Chang Rong Li
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Digital Image Correlation ◽  
Intensity Factor ◽  
Digital Image ◽  
Correlation Method ◽  
Compact Tension ◽  
Image Correlation ◽  
Full Field ◽  
Opening Mode

Applications of the digital image correlation method (DIC) for the determination of the opening mode stress intensity factor (SIF) is investigated using an edge cracked aluminum plate in this paper. Standard compact tension test specimen was tested under tensile loading and the full-field displacement fields of the test sample were recorded using DIC. The SIF associated with unavoidable rigid-body displacement translation were calculated simultaneously from the experimental data by fitting the theoretical displacement field using the method of least-squares. Selection of displacement and convergence values is discussed. For validation, the SIF thus determined is compared with theoretical results, confirming the effectiveness and accuracy of the proposed technique. Therefore it reveals that the DIC is a practical and effective tool for full-field deformation and SIF measurement.

scholarly journals Brief communication: Full-field deformation measurement for uniaxial compression of sea ice by using the digital image correlation method

2019 ◽  
Author(s):  
Anliang Wang ◽  
Zhijun Wei ◽  
Xiaodong Chen ◽  
Shunying Ji ◽  
Yu Liu ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Sea Ice ◽  
Uniaxial Compression ◽  
Digital Image ◽  
Correlation Method ◽  
Nonlinear Behavior ◽  
Image Correlation ◽  
Mechanical Behaviors ◽  
Full Field

Abstract. We took advantage of digital image correlation to measure the full-field deformation of sea ice in a uniaxial compression experiment in situ. The characteristics of failure mode, nonlinear behavior and crack propagation are all captured by the strain field of specimens. To our knowledge, this is the first attempt to experimentally capture sequential full-field deformations in the mechanical properties of sea ice. This achievement will extend the ability to further explore the complex mechanical behaviors of sea ice.

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