Provider: - Institution: - Data provided by Europeana Collections- The aim of this paper is improving, development and application of pulsed
thermography as experimental method for detection of ...defect in material. To
accomplish this, the paper has 3 aspects: 1. Experimental research including
оf development and improving conditions for measuring and data acquisition.
2. Theoretical research containing of analytical and numerical solving the
system of partial differential equations for heat convection by conduction,
with corresponding initial and boundary conditions. 3. Theoretical research
considering method and procedure application in pulsed infrared thermography
for given theoretical and experimental conditions. During the first part of
research, specific samples were prepared for experiment where at one side of
the plate equally spaced slots are forming the periodical structure of
defects with defined spatial frequency and depth. The other side of plate was
irradiated with short light pulse and temperature distribution on that side
was analyzed by pulsed infrared thermography. The second part of the
research, considers different models describing twodimensional heat
conduction through planparallel plate with defect in form of flat-bottom
slot, with general and specific initial and boundary conditions. In the third
part of research, comparison of experimental results and results of
simulation was made to determine the conditions and limits of method
applicability for periodically structured defects. The theoretical analysis
and experimental testing of the method was done for the defects in aluminum
plate.- Cilj ovog rada je poboljšanje, razvoj i primena impulsne termografije kao
eksperimentalnog metoda za otkrivanje defekata u materijalu. Da bi se
ostvario taj zadatak, rad je usmeren ka tri sledeća pravca: 1.
Eksperimentalna istraživanja koja obuhvataju razvoj i poboljšanja uslova za
merenje i akviziciju podataka. 2. Teorijska istraživanja koja obuhvataju
analitičko i numeričko rešavanje sistema parcijalnih diferencijalnih
jednačina provođenja toplote kondukcijom uz odgovarajuće početne i granične
uslove. 3. Teorijska istraživanja koja podrazumevaju primenu metode i
procedure u impulsnoj infracrvenoj termografiji za date teorijske i
eksperimentalne uslove. U toku prvog dela istraživanja, izrađeni su posebni
uzorci pripremljeni za eksperiment, gde su na jednoj strani ploče podjednako
razmaknuti žljebovi praveći periodičnu defektnu strukturu sa određenom
prostornom frekfencijom i određenom dubinom. Druga strana ploče bila je
ozračena kratkim svetlosnim impulsom i temperaturna raspodela na istoj strani
bila je analizirana impulsnom infracrvenom termografijom. U drugom delu
testirani su različiti modeli koji opisuju dvodimenzionalnu kondukciju
toplote kroz planparalelnu ploču sa defektom u obliku žljeba sa ravnim dnom
sa opštim i posebnim početnim i graničnim uslovima. U trećem delu izvršeno je
poređenje eksperimentalnih rezultata i rezultata simulacije u cilju
utvrđivanja uslova i granica primenljivosti metoda za periodičnu strukturu
defekata. Izvršena je teorijska analiza i eksperimentalna provera metoda u
slučaju defekata u aluminijumskoj ploči.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
