The construction and operation of electronic speckle pattern interferometer (ESPI) applied to single-inserted sandwich plates have been earliest presented in this paper. Proposed ESPI has advantages of full-field and non-destructive testing, which can measures microscopic out-of-plane displacement in the elastic region without wasting specimen. For validation purpose, the finite element method (FEM) analysis was conducted. By comparing the results of ESPI and FEM displacement fields around the inserts that a convincing agreement is revealed. The effect of potting material diameter on the displacement of single-inserted sandwich plates was obtained by the ESPI and FEM.
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.
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