PSI - Issue 81

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ScienceDirect

Procedia Structural Integrity 81 (2026) 287–291

© 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers Keywords: plate; bending; stress concentration factor; stress; deformability; stress-strain state. 1. Introduction Machine components, mechanisms, and structural elements are widely used in mechanical engineering, shipbuilding, aircraft construction, the rocket industry, and civil engineering (Kryzhanivskyi et al. (2019); Yasniy et al. (2013) Pidgurskyi et al. (2024); Rudyak et al. (2015); Yasniy et al. (2017)). Circular plates are among such elements and are commonly used in the above mentioned industrial fields. They can be manufactured from steel, timber, as well as from various composite materials. One of these composite materials is a two-component epoxy resin (Kashytskyi et al. (2023)). Such materials may be subjected to different types of loading, including monotonic, low-cycle, dynamic, and other loading regimes. One of the experimental methods for investigating such models is the photoelastic method (Voitovich et al. (2010); Malezhik et al. (2014); Voitovich et al. (2011); Malezhik et al. (2019)). Stress concentration factors near circular holes were described in detail in the monograph by Savyn et al. (1976). The aim of this study is an experimental investigation of the stress-strain state of circular plates made of epoxy resin with eccentric circular holes. Abstract This paper presents the results of an experimental study of the stress-strain state of circular plates with eccentric circular holes. The investigations were carried out using the photoelastic method with the application of the stress-freezing technique. Two types of plates were considered: a thin plate with a thickness-to-radius ratio of 0.04 and a moderately thick plate with a ratio of 0.12. The plates were freely supported along the contour and subjected to an axial load. It was found that, for the thin plate, the maximum stresses occur at points along the boundary of the hole on the tensile surface of the plate. In contrast, for the moderately thick plate, the maximum stresses are located at points along the hole contour on the compressed surface. Stress distribution curves (along the hole generators) were obtained. Stress concentration factors in the vicinity of the circular holes were determined. As a result, the stress concentration factor near the hole was found to be 2.7 for the thin plate and 2.4 for the moderately thick plate. VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Study of stress-strain state of circular plate with eccentric circular holes Leonid Voytovych a , Oleg Dejneka a , Zoia Sasiuk a , Leonid Serilko a , Mykola Koziar a , Vadim Lipyanin a ,Ihor Mudryy b, *, Andriy Pelekh b a National University of Water and Environmental Engineering, Soborna 11, 33000 Rivne, Ukraine b Lviv Polytechnic National University, S. Bandery 12, 79013, Lviv, Ukraine

* Corresponding author. Tel.: +38-096-202-09-07; fax: +0-000-000-0000 . E-mail address: qwert_2024@ukr.net

2452-3216 © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers 10.1016/j.prostr.2026.03.050