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    Accurate kinematic measurement at interfaces between dissimilar materials using conforming finite-element-based digital image correlation

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    Type
    Article
    Authors
    Tao, Ran cc
    Moussawi, Ali cc
    Lubineau, Gilles cc
    Pan, Bing
    KAUST Department
    Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2016-02-11
    Online Publication Date
    2016-02-11
    Print Publication Date
    2016-06
    Permanent link to this record
    http://hdl.handle.net/10754/621528
    
    Metadata
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    Abstract
    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.
    Citation
    Tao R, Moussawi A, Lubineau G, Pan B (2016) Accurate kinematic measurement at interfaces between dissimilar materials using conforming finite-element-based digital image correlation. Optics and Lasers in Engineering 81: 103–112. Available: http://dx.doi.org/10.1016/j.optlaseng.2016.01.012.
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Optics and Lasers in Engineering
    DOI
    10.1016/j.optlaseng.2016.01.012
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.optlaseng.2016.01.012
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program

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