Numerical analysis of temperature influence on deformation and effort of bimetallic element

• Autorzy: Panowicz R. , Kucewicz M.

Identyfikatory

DOI

10.5604/12314005.1216385

• Języki publikacji: EN

Abstrakty

EN

Bimetallic elements consist of at least two, connected together, material layers. The materials have different coefficients of thermal expansion. An active layer of bimetallic elements has a greater thermal expansion coefficient, whereas a passive layer has a lower one. Therefore, deformation of bimetallic elements occurs due to a change in temperature. The simplest case of bimetallic elements is a strip, which bends in the shape of an arc. As a consequence of elements deformation, stresses appear in them. An important problem is optimization of each layer of the element to achieve certain characteristics of the system. The elements should work in an elastic domain in the entire operating range. The aim of the paper is to present both numerical and analytical results for three different bimetallic elements. The following pairs of materials are considered: invar – incoloy, steel – brass and aluminium – molybdenum subjected to uniform heating. An influence of temperature and active layer dimensions of the sample on deformation and stresses of each layer was developed. It was found that the stress value is close to zero, on the boundary of each layer, for characteristic deflections of the considered bimetallic elements. The results of numerical analyses were compared with a theoretical solution presented by Timoshenko. Numerical analyses were performed using the Finite Element Method implemented in the commercial software LS-Dyna.

Słowa kluczowe

EN

finite elements method; bimetallic elements; thermoelasticity

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 3
• Strony: 389--394
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Panowicz R.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Kucewicz M.

• Military University of Technology Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Company DM, Brass (Copper-Zinc) MB30, Commercial materials, 2015.
• [2] Corporation SM, The story of the “INCOLOY® alloys series”, from 800, through 800H, 800HT, Commercial Materials, 2004.
• [3] Eischen, J. W., Chung, C., Kim, J. H., Realistic modeling of edge effect stresses in bimaterial elements, Journal of Electronic Packaging, Vol. 112(1), pp. 16-23, 1990.
• [4] Gibb, S., An Introduction to Invar, College of Optical Sciences, University of Arizona, Tucson 2006.
• [5] Hallquist, J. O., LS-DYNA, Theory Manual, Livemore Software Technology Corporation, 2006.
• [6] Timoshenko, S., Analysis of bi-metal thermostats, Journal of Optical Society of America and R. S. I., Vol. 11, pp. 233-255, 1925.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.