TECHICAL Series MATHEMATICS  INFORMATICS  PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Theoretical and Experimental Studies on Heat Transfer in Multi-Layer Composite
(Cercetări teoretice şi experimentale privind transferul termic n compozite stratificate)
Vol LXVII • No. 2/2015
Georgiana Luminiţa Enăchescu*, Ionel C. Popescu**, Radu I. Iatan*
* Universitatea POLITEHNICA din București, Splaiul Independenţei 313, Sector 6, Bucureşti e-mail: georgianaenachescu@yahoo.co.uk;
** S.C. GENERATORS ICPET ABUR S.A., București

 Keywords   laminated composites, thermal experiment

 Abstract
This paper presents an experimental system used for the measurement of heat developed at the interfaces of layers that form the stacked combination (between two and six layers), with the aid of appropriately positioned thermocouples. Temperatures curves are envisaged together with thermal gradients and corresponding processing to establish the fourth degree polynomial functions and maximum and minimum temperature deviations and thermal gradients. Finite element numerical modeling led to the determination of the deformations and stresses developed under the effect of heat in the plate being tested (in this case, for example, a six-layers plate). The temperature values between layers were established theoretically and were compared with the experimental values and then used in the numerical analysis.

 Rezumat
Lucrarea prezintă instalaţia experimentală utilizată pentru măsurarea valorilor temperaturilor dezvoltate la nivelul interfeţelor straturilor care au format combinaţiile structurilor stratificate (de la două la şase straturi), cu ajutorul termocuplurilor poziţionate adecvat. Se au n vedere curbele temperaturilor şi gradienţilor termici, precum şi prelucrarea corespunzătoare pentru stabilirea funcţiilor polinomiale de gradul patru şi a abaterilor maxime şi minime pentru temperaturi şi gradienţii termici. Modelarea numerică cu elemente finite conduce la determinarea deformaţiilor şi a tensiunilor dezvoltate sub efect termic n plăcile testate (n cazul de faţă, pentru exemplificare, placa cu şase straturi). Valorile temperaturilor interfaciale au fost stabilite şi pe cale teoretică, comparate cu cele experimentale şi valorificate n cadrul analizei numerice efectuate.



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