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    Identification of a set of macroscopic elastic parameters in a 3D woven composite: Uncertainty analysis and regularization

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    Type
    Article
    Authors
    Gras, Renaud
    Leclerc, Hugo
    Hild, Francois
    Roux, Stéphane
    Schneider, Julian David
    KAUST Department
    Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
    Physical Science and Engineering (PSE) Division
    Date
    2015-03
    Permanent link to this record
    http://hdl.handle.net/10754/564080
    
    Metadata
    Show full item record
    Abstract
    Performing a single but complex mechanical test on small structures rather than on coupons to probe multiple strain states/histories for identification purposes is nowadays possible thanks to full-field measurements. The aim is to identify many parameters thanks to the heterogeneity of mechanical fields. Such an approach is followed herein, focusing on a blade root made of 3D woven composite. The performed test, which is analyzed using global Digital Image Correlation (DIC), provides heterogeneous kinematic fields due to the particular shape of the sample. This displacement field is further processed to identify the four in-plane material parameters of the macroscopic equivalent orthotropic behavior. The key point, which may limit the ability to draw reliable conclusions, is the presence of acquisition noise in the original images that has to be tracked along the DIC/identification processing to provide uncertainties on the identified parameters. A further regularization based on a priori knowledge is finally introduced to compensate for possible lack of experimental information needed for completing the identification.
    Citation
    Gras, R., Leclerc, H., Hild, F., Roux, S., & Schneider, J. (2015). Identification of a set of macroscopic elastic parameters in a 3D woven composite: Uncertainty analysis and regularization. International Journal of Solids and Structures, 55, 2–16. doi:10.1016/j.ijsolstr.2013.12.023
    Sponsors
    The authors acknowledge the financial support provided by SNECMA (SAFRAN group).
    Publisher
    Elsevier BV
    Journal
    International Journal of Solids and Structures
    DOI
    10.1016/j.ijsolstr.2013.12.023
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ijsolstr.2013.12.023
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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