Identification of a set of macroscopic elastic parameters in a 3D woven composite: Uncertainty analysis and regularization
Type
ArticleKAUST Department
Composite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)Physical Science and Engineering (PSE) Division
Date
2015-03Permanent link to this record
http://hdl.handle.net/10754/564080
Metadata
Show full item recordAbstract
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.2013.12.023Sponsors
The authors acknowledge the financial support provided by SNECMA (SAFRAN group).Publisher
Elsevier BVae974a485f413a2113503eed53cd6c53
10.1016/j.ijsolstr.2013.12.023