TY - JOUR
T1 - Accurate kinematic measurement at interfaces between dissimilar materials using conforming finite-element-based digital image correlation
AU - Tao, Ran
AU - Moussawi, Ali
AU - Lubineau, Gilles
AU - Pan, Bing
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
PY - 2016/2/11
Y1 - 2016/2/11
N2 - Digital image correlation (DIC) is now an extensively applied full-field measurement technique with subpixel accuracy. A systematic drawback of this technique, however, is the smoothening of the kinematic field (e.g., displacement and strains) across interfaces between dissimilar materials, where the deformation gradient is known to be large. This can become an issue when a high level of accuracy is needed, for example, in the interfacial region of composites or joints. In this work, we described the application of global conforming finite-element-based DIC technique to obtain precise kinematic fields at interfaces between dissimilar materials. Speckle images from both numerical and actual experiments processed by the described global DIC technique better captured sharp strain gradient at the interface than local subset-based DIC. © 2016 Elsevier Ltd. All rights reserved.
AB - Digital image correlation (DIC) is now an extensively applied full-field measurement technique with subpixel accuracy. A systematic drawback of this technique, however, is the smoothening of the kinematic field (e.g., displacement and strains) across interfaces between dissimilar materials, where the deformation gradient is known to be large. This can become an issue when a high level of accuracy is needed, for example, in the interfacial region of composites or joints. In this work, we described the application of global conforming finite-element-based DIC technique to obtain precise kinematic fields at interfaces between dissimilar materials. Speckle images from both numerical and actual experiments processed by the described global DIC technique better captured sharp strain gradient at the interface than local subset-based DIC. © 2016 Elsevier Ltd. All rights reserved.
UR - http://hdl.handle.net/10754/621528
UR - https://linkinghub.elsevier.com/retrieve/pii/S0143816616000245
UR - http://www.scopus.com/inward/record.url?scp=84957881487&partnerID=8YFLogxK
U2 - 10.1016/j.optlaseng.2016.01.012
DO - 10.1016/j.optlaseng.2016.01.012
M3 - Article
SN - 0143-8166
VL - 81
SP - 103
EP - 112
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
ER -