The aim of nondestructive testing by IR thermography is the qualification of object properties during temporary processes occurred at cyclic or impulse thermal stimulation of a testing object such as heating or cooling. As an available form of answer on thermal stimulation is change of temperature and speed of temperature changes it contains information about values of capacity and thermal conductivity, characterising internal structure of a testing object. The basic foundation of nondestructive testing methods with IR thermography technics is fact that every class of testing objects reacts on stimulation in a specific manner. There can be different reactions of using stimulation of a particular type to cause the beginning of thermal wave and reaction of an object against its spreading. As stimulation can be used: sound waves, infrared lamps, microwaves, flash lamps, lasers, other. The stimulation has most often the character of an impulse or sinusoidal wave. The answer of an object against stimulation is registered by the thermal system and next on the base of thermograms analyses result images with visible defects are given. A lot of methods of nondestructive testing by IR thermography are well-known and in practical use. The most from them are described on the work of X. P. V. Maldague. In Military Institute of Armament Technology the most often used methods for composite testing are: optical lock-in thermography, reflection method, transmission method, active method with microwave source. The paper contains a short review of the current and planned research work on the above mentioned subjects in MIAT.
Nondestructive testing of composite materials for military applications by IR thermography methods
Zerstörungsfreie Prüfung von Verbundwerkstoffen für militärische Anwendungen durch Infrarotthermographie
2010
10 Seiten, 9 Bilder, 2 Tabellen, 18 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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