Branch of South Ural State University (National Research University), Zlatoust, Russia
M. A. Matveeva, Senior Lecturer of the Chair for Engineering and Technologies for Materials Production, e-mail: matveevama@susu.ru
I. V. Chumanov, Dr. Eng., Professor, Head of the Chair for Engineering and Technologies for Materials Production 1, e-mail: chumanoviv@susu.ru

South Ural State University (National Research University), Chelyabinsk, Russia
A. V. Erpalov, Senior Researcher at the Center for Vibration Testing and Structural Condition Monitoring, Cand. Eng.
K. A. Khoroshevsky, Engineer at the Center for Vibration Testing and Structural Condition Monitoring

The presented work highlights the results of the study of fatigue characteristics of multilayer metal composite material obtained by electroslag remelting. Two groups of specimens with longitudinal and transverse arrangement of layers in cross-section were selected for the study. The computational-experimental evaluation of the maximum stresses in the range of elastic deformations occurring in the specimen during static tests on the electrodynamic vibration test bench was carried out on two specimens with transverse arrangement of layers. In order to record the strains, a load cell rigging was fixed on the test specimens. Static tests in cantilever bending were carried out to move the vertical bench table by 1, 2 and 3 mm. Numerical evaluation of the stress-strain state was carried out in the finite element package ANSYS. The specimen model is represented by shell elements of 2 mm thickness. The model partitioning was performed by a structured mesh of 5225 elements. As boundary conditions on one of the faces corresponding to the gripping points, a restriction in the form of a rigid embedding was imposed, and on the second face – a displacement restriction on the x-axis (free displacement), on the y-axis (displacement is prohibited), on the z-axis (1, 2 and 3 mm depending on the level of loading). A picture of normal stress distribution in the specimen was obtained. Fatigue tests were performed under a standard harmonic loading cycle with a frequency of 20 Hz (N = 2∙106 cycles). Tests were carried out either until the specimens failed or until the test base was reached. Based on the results of the tests, Baskvin's impact curves were plotted for 2 groups of specimens. It was found that in the group with transverse arrangement of plies in the cross-section of the specimen under cantilever bending the durability is greater than in the group with longitudinal arrangement of plies.
The study was carried out at the expense of the Russian Science Foundation grant No. 22-29-20049, https://rscf.ru/project/22-29-20049/.

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