Wyniki wyszukiwania - BazTech

1

Fatigue monitoring of steel structures using electromagnetic and infrared thermography inspection methods

Psuj G., Szymanik B.

Przegląd Elektrotechniczny

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2016

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R. 92, nr 5

5--8

EN

Two nondestructive methods are used for monitoring of fatigue process in steel samples under cyclic loading: the infrared thermography (IRT) and electromagnetic (EM). The IRT allows to observe the general global condition of the material while the EM to carry out local, detail examination of the fatigue stage in critical region. Both methods have different physical basics what allows to obtain a wider range of information about the state of the structure.

PL

W pracy wykorzystano dwie nieniszczące metody badań do monitorowania procesu zmęczeniowego stalowych próbek poddanych obciążeniom cyklicznym: metodę termografii podczerwonej (IRT)j i elektromagnetyczną (EM). Metoda IRT umożliwia obserwację globalnego stanu badanego materiału natomiast metoda EM pozwala na dokładną lokalną inspekcję stanu zmęczeniowego obszarów krytycznych. Z uwagi na fakt wykorzystywania odmiennych właściwości fizycznych do pośredniej obserwacji stanu struktury przez obie metody możliwe jest uzyskanie szerszego zakresu komplementarnych informacji o zmianach zmęczeniowych.

2

The thermographic signal reconstruction method: A powerful tool for the enhancement of transient thermographic images

Balageas D. L., Roche J. M., Leroy F. H., Liu W. M., Gorbach A. M.

Biocybernetics and Biomedical Engineering

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2015

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Vol. 35, no. 1

1--9

EN

Important progress occurred in pulse-stimulated thermography, in particular thanks to the TSR technique, a technique based on the decomposition of thermograms on a logarithmic polynomial basis and the use of the logarithmic derivatives to enhance the detection of defects in structures. Its fields of application begin to broaden to the characterization of transient internal heat sources in experimental mechanics and biomedicine. The TSR technique is presented, in particular the last developments leading to the production of a unique synthetic image. Two recent examples of applications in experimental mechanics and biomedicine, taken from literature, are described: in situ detection of damages in a composite material during mechanical tests and in vivo visualization of subcutaneous functional angioarchitecture in humans.

3

Thermographic method of fatigue assessment of polymeric materials

Rojek M., Wróbel G.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 42, nr 1-2

88-93

EN

Purpose: The article presents the adoption of thermal imaging techniques in assessing methodology of the fatigue degradation degree of the polymeric materials. Design/methodology/approach: Epoxy composites reinforced with glass fiber have been subjected to three point method fatigue bending. The degraded materials were then tested using thermovision method. Findings: In experiments the temperature changes velocity of the samples was determined in the conditions of infrared radiation. The dependence between speed up of temperature and the number of fatigue cycles was determined. With an increasing a number of fatigue cycles drop in temperature speeds up was observed. Research limitations/implications: Restriction is a condition of loading state - as homogeneous as possible, and hence the homogeneous degradation state of the material. Practical implications: Designated diagnostic relation gives a basis for non-destructive evaluation of the degree of exhaustion of load-bearing capacity of the material. Originality/value: Original value of the paper are the experimental results proving the effectiveness of non-destructive thermographic methods for polymeric materials diagnosis.