A vibration-based identification of elastic properties of stitched sandwich panels

Nan Li (1, 2) , Mabrouk Ben Tahar (1) , Zoheir Aboura (1) , Kamel Khellil (1)

1 Roberval - Roberval
2 CAS - Chinese Academy of Sciences [Beijing]

Stitched sandwich becomes popular in structural application owing to its better performance in the transverse direction with respect to classical sandwich structure and relatively low-cost additional stitching process. The identification of its elastic properties is essential for offering a tailored structure for specific applications. A non-destructive identification method based on vibration test is proposed to obtain these parameters. The number of parameters is firstly reduced by a sensibility analysis. The retained parameters are identified by minimizing the cost function which indicates the gap between measured frequencies from vibration test and calculated frequencies from a finite element model. This method is applied to a stitched sandwich panel and its elastic properties are successfully identified.

Domaines: Matériaux

Nan Li, Mabrouk Ben Tahar, Zoheir Aboura, Kamel Khellil. A vibration-based identification of elastic properties of stitched sandwich panels. Journal of Composite Materials, 2018, 53 (5), pp.579-592. ⟨10.1177/0021998318788141⟩. ⟨hal-02124671⟩