<title>Electronic speckle pattern interferometry applied to the displacement measurement of sandwich plates with double fully potted inserts</title>

Abstract

The construction of electronic speckle pattern interferometer (ESPI) applied to sandwich plates with double inserts has been presented in this paper. Proposed ESPI has advantages of full-field and non-destructive testing that can measures microscopic out-of-plane displacement in the elastic region and without wasting specimen. For validation purpose, the finite element method (FEM) analysis was conducted. By comparing the results of ESPI and FEM displacement at the center of the specimen that a convincing agreement is revealed, thus showing the effect of spatial interval of the double inserts on the displacement of sandwich plates under loading.