Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

NUMERICAL MODELing OF SCALE EFFECTS FOR CIRCULAR CYLINDER IN THE THEORY OF THERMOELASTIC MATERIALS WITH VOIDS


DOI: 10.5937/jaes0-28042 
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Yulong Li*
Northwestern Polytechnical University (NPU), School of Civil Aviation, Xi'an Shaanxi, Republic of China

Alexander V. Volkov
Institute of Applied Mechanics of Russian Academy of Sciences, Laboratory of Non-Classical Models of Composites Materials and Structures, Moscow, Russian Federation

Lev N. Rabinskiy
Moscow Aviation Institute (National Research University), Institute of General Engineering Education, Moscow, Russian Federation

Aleksandr O. Shemiakov
Moscow Aviation Institute (National Research University), Moscow, Russian Federation

This article is relevant, as changes during the external loading may affect the stress state of the materials. The aim of this paper is to consider the numerical modeling of heating for circular cylinders in the frame of the theory of elastic materials with voids. A numerical solution is build using COMSOL Multiphysics software, where the implementation of the considered theory is realized based on the direct equation-definition approach. Constitutive relations were written in General form partial differential equation module. A matrix form of the equations for the two-dimensional case was used. Scale effects arising in considered problems are discussed. The classical solution is the particular case of the considered theory, when the coupling number tends to asero, i.e. when the micro-dilatation effects are small and do not affect the material’s stress state. The limiting case in the case of the small value of the coupling number is the classical thermoelasticity solution.

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This work was supported by the RFBR grant 18-08- 00643-a, 20-01-00517-а and by the Grant of the President of the Russian Federation No MK-3869-2019.8.

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