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Non-Destructive Testing of Structures Using Optical and Other Methods: A Review

A. Kroworz1, A. Katunin1,*

Institute of Fundamentals of Machinery Design, Silesian University of Technology, Gliwice 44-100, Poland.

Corresponding author: Andrzej Katunin. Email:

Structural Durability & Health Monitoring 2018, 12(1), 1-18.


Non-destructive testing (NDT) of structures is one of the most important tasks of the proper maintenance and diagnosis of machines and constructions structural condition. NDT methods contribute to the damage tolerance philosophy used in the aircraft design methodology as well as many other operation and maintenance programs of machinery and constructions. The following study is focusing on overviewing an important group of NDT methods: the optical and other ones, which found broad applicability in scientific and industrial studies nowadays. The paper discusses the selected most widely applicable methods, namely, visual testing, ultrasonic testing, radiographic testing, infrared thermography as well as electronic speckle pattern interferometry and shearographic testing. Besides the basic principles of testing using these methods, their potential applications in various industrial and technological branches are broadly discussed. The analysis as categorization of the NDT methods provided in this paper may help in selection of such methods in diagnosis of various types of structures and defects and damage occurring in these structures.


Cite This Article

Kroworz, A., Katunin, A. (2018). Non-Destructive Testing of Structures Using Optical and Other Methods: A Review. Structural Durability & Health Monitoring, 12(1), 1–18.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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