Strain field measurement of filament-wound composites at ±55° using digital image correlation: An approach for unit cells employing flat specimens

2010 ◽  
Vol 92 (10) ◽  
pp. 2457-2464 ◽  
Author(s):  
M. Torres Arellano ◽  
L. Crouzeix ◽  
B. Douchin ◽  
F. Collombet ◽  
H. Hernández Moreno ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Field Measurement ◽  
Strain Field ◽  
Image Correlation ◽  
Filament Wound ◽  
Unit Cells ◽  
Strain Field Measurement

scholarly journals Strain field measurement around the crack tip in Ni-base superalloy using Digital Image Correlation

2018 ◽  
Vol 84 (866) ◽  
pp. 18-00246-18-00246
Author(s):  
Yuki OTSUKA ◽  
Motoki SAKAGUCHI ◽  
Yu KUROKAWA ◽  
Hirotsugu INOUE
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Field Measurement ◽  
Strain Field ◽  
Crack Tip ◽  
Image Correlation ◽  
Strain Field Measurement ◽  
Base Superalloy

Methodology for in situ stress intensity factor determination on cracked structures by digital image correlation

2010 ◽  
Vol 1 (4) ◽  
pp. 344-357 ◽  
Author(s):  
V. Richter‐Trummer ◽  
P.M.G.P. Moreira ◽  
S.D. Pastrama ◽  
M.A.P. Vaz ◽  
P.M.S.T. de Castro
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Digital Image Correlation ◽  
Intensity Factor ◽  
Digital Image ◽  
Strain Field ◽  
Image Correlation ◽  
Content Type ◽  
Cracked Structures

PurposeThe purpose of this paper is to develop a methodology for in situ stress intensity factor (SIF) determination that can be used for the analysis of cracked structures. The technique is based on digital image correlation (DIC) combined with an overdetermined algorithm.Design/methodology/approachThe linear overdeterministic algorithm for calculating the SIF based on stress values around the crack tip is applied to a strain field obtained by DIC.FindingsAs long as the image quality is sufficiently high, a good accuracy can be obtained for the measured SIF. The crack tip can be automatically detected based on the same strain field. The use of the strain field instead of the displacement field, eliminates problems related to the rigid body motion of the analysed structure.Practical implicationsIn future works, based on the applied techniques, the SIF of complex cracked plane stress structures can be accurately determined in real engineering applications.Originality/valueThe paper demonstrates application of known techniques, refined for other applications, also the use of stress field for SIF overdeterministic calculations.

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