Dynamic shear strain analysis for silhouette reconstruction of defects in anisotropic laminated composites

In last decade, composite materials have been used widely in industrial area. Structural elements produced from the composites possess more complicate mechanical properties than components manufactured from isotropic materials. Therefore, imaging algorithms of defects in anisotropic materials have not yet been developed well, because of anisotropic properties of elastic media affect much on the shape reconstruction. This paper proposes a novel method which has an ability to reconstruct images of subsurface defects through evaluating the linearity between the orthogonal pair of out-of-surface shear strains. Numerical simulation and several acoustical experiments are performed to show accuracy and applicability of our proposed approach for imaging of defects in an anisotropic laminated composites.