Normal Stresses with Temperature Bending of Composite Rod

Existing methods for calculating temperature stresses in composite rods have certain disadvantages. The importance of such calculations is related to the safety and efficiency of similar engineering structures in various industries such as 

construction, mechanical engineering and aviation. The paper presents a study of the behavior of composite rods under thermal loading, taking into account bending deformation and the conditions leading to maximum normal stresses. Composite rods consisting of two different metals welded together have been analyzed. A methodology for calculating normal stresses has been developed that takes into account the physical and mechanical characteristics of the materials of the component parts, such as the modulus of elasticity and coefficient of linear thermal expansion. The intrinsic neutral layers of each metal rod have been identified, which makes it possible to more accurately determine the stress distribution in the composite rods. An example of the analytical calculation of normal stresses occurring in a rod composed of steel and aluminum parts is provided. Diagrams of normal stresses along the height of the composite rods were constructed. Additionally, a FEM analysis of the composite rod under temperature influence was carried out while using Ansys 2023 R2 software. The results of the nume-rical study confirmed with high accuracy the data obtained theoretically. The outcomes of this study are crucial for practical applications in the design and construction of such composite structures, providing engineers with more accurate data for analyzing the influence of thermal stresses.

1. Timoshenko S. P. (1971) Stability of Rods, Plates and Shells. Moscow, Nauka Publ. 730 (in Russian).

2. Timoshenko S. P. (1971) Strength and Vibration of Structural Elements. Moscow, Nauka Publ. 704 (in Russian).

3. Harris B. (1999) Engineering Composite Materials. London, The institute of Materials. 193.

4. Podskrebko M. D. (2007) Strength of Materials. Minsk, Vysheyshaya Shkola Publ. 797 (in Russian).

5. Starovoitov E. I. (1999) Strength of Materials. Gomel, Belarusian State University of Transport. 219 (in Russian).

6. Dudjak A. I., Khvasko V. M. (2022) Bending of Composite Beams. Theoreticheskaya I Prikladnaya Mekhanika: Mezhdunar. Nauch.-Tekhn. Sb. [Theoretic and Applied Mechanics: International Scientific and Technical Collection]. Minsk, Belarusian National Technical University, (36), 118–120 (in Russian).

7. Dudjak A. I., Khvasko V. M. (2022) Temperature Stresses in a Bimetallic Rod. Theoreticheskaya I Prikladnaya Mekhanika: Mezhdunar. Nauch.-Tekhn. Sb. [Theoretic and Applied Mechanics: International Scientific and Technical Collection]. Minsk, Belarusian National Technical University, (36), 139–142 (in Russian).

8. Khvasko V. M., Bandara H. M. S. H. (2023) Study of Bending Deformations of a Two-Supported Beam Using Ansys 22.2. Informacionnye Tekhnologii v Obrazovanii, Nauke i Proizvodstve: Materialy Nauch.-Tekhn. Internet-Konf., Minsk, 21–22 Noyabrya [Information Technologies in Education, Science and Production: Proceedings of Scientific and Technical Internet-Conference, Minsk, November 21–22, 2022]. Minsk, Belarusian National Technical University, 191–195. https://rep.bntu.by/handle/data/127990.

9. Barbero E. J. (2014) Finite Element Analysis of Composite Materials Using Ansys. 2nd Edition. New York, CRC Press, Taylor & Francis Group. 82.

10. Jayalin D., Arulraj Prince G., Karthika V. (2015) Analysis of composite beam using Ansys. International Journal of Research in Engineering and Technology. Volume 04, Special Issue 09, 11–15. https://ijret.org/volumes/2015v04/i21/IJRET20150421003.pdf.