Identification of alloy substitute thermal capacity (broken line model)

• Autorzy: Mochnacki B. , Szopa R.
• Języki publikacji: EN

Abstrakty

EN

The theoretical aspects and also the method of inverse problem solution connected with the identification of alloy substitute thermal capacity are discussed. The substitute thermal capacity (STC) appears when the problem of alloys solidification is described by the energy equation corresponding to the one domain method. The course of STC is assumed in the form of broken line and an alloy latent heat and a certain temperature TM from the interval [TS ,TL] (solidus and liquidus border temperatures) determine the form of function describing the parameter discussed. At the stage of inverse problem solution the basic variant of gradient method is used. The example concerns the estimation of cast carbon steel STC. The computations concerning the numerical solution of direct problem and sensitivity one base on the explicit scheme of finite difference method. In the final part of the paper the results of identification process are shown.

Słowa kluczowe

EN

information technology; foundry industry; solidification process; inverse problems; numerical methods

PL

technologia informatyczna; przemysł odlewniczy; proces krzepnięcia; zagadnienie odwrotne; metody numeryczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 4
• Strony: 93--96
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Mochnacki B.

autor

Szopa R.

• Czestochowa University of Technology, 42-200 Czestochowa, Dabrowskiego 69,

Bibliografia

• [1] Mochnacki B, Majchrzak E., Identification of macro and micro parameters in solidification model, Bulletin of the Polish Academy of Sciences, Technical Sciences, 55, 1, 2007, 107-113.
• [2] Mochnacki B., Suchy J. S., Numerical methods in computations of foundry processes, PFTA, Cracow, 1995.
• [3] Majchrzak E., Mochnacki B., Suchy J. S., Identification of substitute thermal capacity of solidifying alloy, Journal of Theoretical and Applied Mechanics, 46, 2, 2008, 257-268.
• [4] Majchrzak E., Dziewonski M., Kaluza G., Identification of cast steel latent heat by means of gradient method. Int. J. Computational Materials Science and Surface Engineering, 1, 5, 2007, 555-570.
• [5] Majchrzak E., Dziewonski M., Kaluza G., Identification of latent heat of biological tissue subjected to the freezing, Scientific Research of the Institute of Mathematics and Computer Science, 1(5), 2006, 106-113.
• [6] R. Szopa, J. Siedlecki, Sensitivity analysis in nonlinear heat conduction, Scientific Research of the Institute of Mathematics and Computer Science, 1(2), 2003, 175-182.