Work

Three-dimensional defect reconstruction in carbon fiber-reinforced composites with temporally non-uniform pulsed thermography data

Year: 2025

Type: article

Abstract: This research study presents an efficient and comprehensive three-dimensional photothermal reconstruction scheme for non-uniform pulsed thermography data utilizing the virtual wave concept. For the transformation of temperature signals into virtual wave signals, different physical-based temporally non-uniform sampling techniques for the temperature and the virtual wave signal are used. Furthermore, time reversal is implemented for three-dimensional defect reconstruction in the context of temporally non-uniform sampling. The proposed reconstruction scheme is experimentally demonstrated using carbon fiber-reinforced composite samples with foreign object defects as well as flat bottom holes. To sum up, a reconstruction technique is demonstrated that allows increasing the computational efficiency, while retaining the quality of the reconstruction results and simultaneously reducing data storage requirements compared to conventional temporally uniform sampling.

Source: NDT & E International

DOI: 10.1016/j.ndteint.2025.103363

Authors: L. Gahleitner, G. Mayr, P. Burgholzer, U. Cakmak

Institutions: University of Applied Sciences Upper Austria, Research Center for Non Destructive Testing (Austria), Johannes Kepler University of Linz

Language: English

Topic: Thermography and Photoacoustic Techniques

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,440

Funders: Österreichische Forschungsförderungsgesellschaft, European Regional Development Fund