PSI - Issue 81

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 81 (2026) 282–286

© 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: wood, modulus of elasticity, secant modulus, moisture content, loading, impregnation time Abstract This paper presents the results of experimental studies on solid-section pine wood prisms subjected to axial compression along the fibres under different impregnation conditions. Using experimental and statistical methods, changes in the modulus of elasticity and the secant modulus of deformation are determined for pine wood with varying impregnation times. Diagrams of the modulus of elasticity are constructed for solid pine wood under short-term loading at different levels of water saturation. The main parameters and statistical characteristics of the regression correlation equations are presented. It is found that both the modulus of elasticity and the modulus of deformation decrease as a result of water saturation of the wood specimens up to 30%. Statistical processing of the experimental results is performed to ensure reliability. Wood is a strategic natural material that is used in almost all sectors of the economy, including construction (Pinchevska and Zavialov (2020); Horbachova et al. (2023); Homon et al. (2024); Moya and Bano (2017); Heitner et al. (2010); Aleksiievets et al. (2024)). In the design of buildings and structures for various purposes, wood products, components, and structural elements are frequently employed (Ivaniuk et al. (2025); Bula and Pelekh (2023); Pavluk et al. (2025); Zhao et al. (2020); Gomon et al. (2022); Rescalvo et al. (2020)). Such elements may be exposed to different temperature and moisture conditions (Han and Tesfamariam (2025); Pavluk et al. (2023); Mykhailovskyi (2022); Gomon et al. (2023); Hua et al. (2025); Homon et al. (2025)), which can affect their physical and mechanical properties in the untreated state (Datsiuk et al. (2024); Da Silva and Kyriakides (2007); Matviuk et al. (2025); Gong et al. (2019); Homon et al. (2023); Landis et al. (2002)). Such properties include strength and deformability characteristics (Fojtik (2019); Homon et al. (2024); Huang et al. (2006); Zakic (1974); Heidarzadeh et al. (2026); Gomon et al. (2022)). Under these conditions, the modulus of elasticity and the secant modulus of deformation may change (Andor and Bellovics VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Study of Changes in the Modulus of Elasticity and Secant Modulus of Deformation of Moistened Pine Wood Mykola Polishchuk a , Svytoslav Gomon a, *, Sviatoslav Homon a , Petro Gomon a , Dmytro Husachuk b , Inna Parfentyeva b , Mariia Smal b , Oksana Dziubynska b a National University of Water and Environmental Engineering, Soborna 11, 33000 Rivne, Ukraine b Lutsk National Technical University, Lvivska 75, 43018 Lutsk, Ukraine 1. Introduction

* Corresponding author. Tel.: +38-067-915-86-50; fax: +0-000-000-0000 . E-mail address: slavagomon@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.2026.03.049