The stressed­strained state of a rod at crystallization considering the mutual influence of temperature and mechanical fields

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.203330

Keywords:

thermomechanical state, Gibbs variation principle, crystallization front, approximate analytical method

Abstract

This paper reports a solution to the problem of determining the motion law of the crystallization front and the thermomechanical state of a two-phase rod for the case of mutual influence of the temperature and mechanical fields. An approximate analytical method has been used to solve the problem, combined with the method of successive intervals and a Gibbs variation principle. This method should indicate what is "more beneficial" to nature under the assigned external influences ‒ to change the temperature of the fixed element of a body or to transfer this element from one aggregate state to another. It is this approach that has made it possible, through the defined motion law of an interphase boundary, to take into consideration the effect of temperature on the tense-deformed state in the body, and vice versa. The ratios have been obtained to define the motion law of an interphase boundary, the temperature field, and the tense-deformed state in the rod. The results are shown in the form of charts of temperature and stress dependence on time and a coordinate.

An analysis of the results shows that changes in the conditions of heat exchange with the environment and geometric dimensions exert a decisive influence on the crystallization process, and, consequently, on temperature and mechanical fields. The principal result is the constructed approximate analytical method and an algorithm for solving the problem on thermoviscoelasticity for growing bodies (bodies with a moving boundary) in the presence of a phase transition considering the heat exchange with the environment. Based on the method developed, the motion law of an interphase boundary, a temperature field, and the tense-deformed state are determined while solving the so-called quasi-related problem of thermoviscoelasticity. An approximate analytical solution has been obtained, which could be used by research and design organizations in modeling various technological processes in machine building, metallurgy, rocket and space technology, and construction

Author Biographies

Andrii Siasiev, Oles Honchar Dniprо National University Gagarina ave., 72, Dnipro, Ukraine, 49010

PhD, Associate Professor

Department of Differential Equations

Andrii Dreus, Oles Honchar Dniprо National University Gagarina ave., 72, Dnipro, Ukraine, 49010

Doctor of Technical Sciences, Associate Professor

Department of Fluid Mechanics and Energy and Mass Transfer

Svitlana Horbonos, Oles Honchar Dniprо National University Gagarina ave., 72, Dnipro, Ukraine, 49010

PhD

Department of Differential Equations

Irina Balanenko, Oles Honchar Dniprо National University Gagarina ave., 72, Dnipro, Ukraine, 49010

PhD

Department of Differential Equations

Serhii Dziuba, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine Simferopolska ave, 2a, Dnipro, Ukraine, 49005

PhD, Senior Researcher

Department of Geodynamic Systems and Vibration Technology

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Published

2020-06-30

How to Cite

Siasiev, A., Dreus, A., Horbonos, S., Balanenko, I., & Dziuba, S. (2020). The stressed­strained state of a rod at crystallization considering the mutual influence of temperature and mechanical fields. Eastern-European Journal of Enterprise Technologies, 3(5 (105), 38–49. https://doi.org/10.15587/1729-4061.2020.203330

Issue

Vol. 3 No. 5 (105) (2020): Applied physics

Section

Applied physics

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Copyright (c) 2020 Andrii Siasiev, Andrii Dreus, Svitlana Horbonos, Irina Balanenko, Serhii Dziuba

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