Analytical and simulation investigation of the experimental design for infrared non destructive testing

Abstract

Index Terms-Non destructive testing; Fault diagnosis; Experiment design; Parameters predetermination; Modeling & simulation.Abstract-We analyse heat conduction in a slab with imposed persistent oscillating temperature. Fourier series and periodic time varying solutions are derived by using separation of variables techniques. The analysis is aimed at assessing the limits of applicability of the simplified analytical model derived in [1] under the hypothesis of semi-infinite spatial domain. Such model allows for parameters predetermination in the design of experiments related with nondestructive tests for defects detection and failure prediction. The effect of the finite length of the specimen is investigated, therefore setting the foundation for experimental investigation of nondestructive damage detection with infrared active thermography with boundary effects accounted for.

Determination of the modulation frequency for thermographic non-destructive testing

“…The predetermination of the frequency of excitation is crucial in the design of non-destructive tests [37] as it dictates the detectability of a defect at a certain depth in the material specimen. Inverse heat conduction in a multi-layer material slab with periodic temperature excitation is considered.…”

The design of infrared non-destructive testing for investigation multi-layer materials

“…A closed form solution of the inverse problem was derived in [9] for a semi-infinite domain. The applicability and limitation of this formula were assessed in [10].…”