FINITE-ELEMENT ANALYSIS OF THE STRESS AND STRAIN FILED OF THIN FUNCTIONALLY GRADED PLATES WITH A CIRCULAR HOLE UNDER VARIOUS TYPES OF LOADING

• Datum: 2026
• Hauptverfasser: HART, E. L., TEROKHIN, B. I.
• Format: Artikel
• Veröffentlicht: текст 3 2026
• Online Zugang: https://journal-itm.dp.ua/ojs/index.php/ITM_j1/article/view/171
• Назва журналу: Technical Mechanics

Thin-walled plate-shell structural elements are widely used in various sectors of engineering and the national economy, particularly in the aerospace, oil and gas, and power industries, mechanical engineering, construction, etc. The presence of holes in structures of this type leads to a sharp increase in local stresses, which under certain conditions may lead to destructive processes. This is especially true if they are used under extreme conditions, which is common in various sectors of engineering. Reducing stress concentration near holes in thin-walled structures is a pressing problem in solid mechanics. One way to do this is to use advanced functionally graded materials (FGMs) with specific mechanical properties. A gradient in mechanical properties allows one to control the stress and strain field of structural elements and may contribute to stress reduction near local stress concentrators. This FGM feature significantly increases the strength and reliability of structures as a whole. This paper presents the results of a computer simulation and finite-element analysis of the stress and strain field of thin rectangular FGM plates under various types of loading. The effect of the FGM plate elastic modulus variation law on stress and strain concentration in the vicinity of a hole is investigated. The stress and strain intensity distribution in local stress concentration zones is obtained. Cases of elastic modulus variation in a horizontal and a vertical direction for each of the loading types under consideration are studied. FGM plate heterogeneity parameters are found such that the stress concentration factor can be reduced down to ~19 %. At the same time, a proportional decrease in the strain intensity in the vicinity of the hole is also observed. 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