Strain Field Identification of an Aluminum Plate by using Distributed Fiber-Optic Sensors

Abstract

In this study we are aiming to identify strain fields of a simply-supported thin plate structure which is subjected to perpendicular loads. In this case a strain field means three strain components, namely e , e , and g , on a surface of the plate. Firstly, an area of a plate is discretized into a number of square elements. Distributed fiber-optic sensors were applied to determine the strain field at each element and the strain field distribution in a whole plate is reconstructed by polynomial equations with the coefficients determined by a least-square method. In various load cases we could successfully identify the strain field at discretized elements on an aluminum plate and reconstruct the strain field distribution in a whole plate.