scholarly journals Residual strain analysis with digital image correlation method for subsurface damage evaluation of hinoki (Chamaecyparis obtusa) finished by slow-speed orthogonal cutting

2017 ◽  
Vol 63 (6) ◽  
pp. 615-624 ◽  
Author(s):  
Yosuke Matsuda ◽  
Yuko Fujiwara ◽  
Koji Murata ◽  
Yoshihisa Fujii
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Residual Strain ◽  
Orthogonal Cutting ◽  
Strain Analysis ◽  
Correlation Method ◽  
Chamaecyparis Obtusa ◽  
Image Correlation ◽  
Damage Evaluation ◽  
Slow Speed

Visualization of Strain Distribution on Deformed Steels Using Digital Image Correlation Method

2017 ◽  
Vol 741 ◽  
pp. 138-143 ◽  
Author(s):  
Norimitsu Koga ◽  
Osamu Umezawa
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Strain Distribution ◽  
Ferritic Steel ◽  
Martensitic Steel ◽  
Strain Analysis ◽  
Correlation Method ◽  
Deformation Mode ◽  
Local Deformation ◽  
Image Correlation

Digital image correlation (DIC) method is a convenient strain analysis method calculating strain from the difference of images between before and after deformation and shows an advantage to apply to any deformation mode or materials as long as significant contrast. We reviewed basic principles of DIC method and then demonstrated strain distribution in tensile deformed ferritic steel and cyclic deformed tempered martensitic steel. Strain distribution in tensile deformed ferritic steel becomes inhomogeneous with lowering temperature due to restriction of slip systems at low temperature. Strain distribution around a fatigue crack in cyclic deformed tempered martensitic steel was visualized by DIC analysis for replica film and strain concentrated on crack tip same as previous report in DIC analysis for specimen surface, which suggests that strain distribution obtained from replica film has an enough reliability. From these results, it can be concluded that DIC analysis is effective method to investigate local deformation and relation between local deformation and fracture behavior in metal materials.

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