PSI - Issue 59

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com

www.elsevier.com/locate/procedia

Procedia Structural Integrity 59 (2024) 718–723

© 2024 The Authors. 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 2023 Organizers Abstract Experimental studies of pine, spruce and oak wood after long-term moistening with a short-term one-time load under axial compression along the fibers were carried out. Wood deformation diagrams of “stress σ с – relative deformation u c ” under specific operating conditions were constructed. New experimental data on changes in the basic mechanical properties of wood after prolonged moistening were obtained. The main strength and deformation characteristics under these operating conditions were determined. It has been established experimentally that the influence of an active aqueous environment significantly diminishes the strength parameters of wood and increases deformability. © 2024 The Authors. 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 2023 Organizers Keywords: wood, moisture, strength, critical deformation, elasticity modulus, water environment. 1. Introduction Scientists pay great attention to the study of the physical and mechanical properties of solid (Landis et al. (2002); Da Silva and Kyriakides (2007); Galicki and Czech (2005)), glued (Zhou et al. (2018); Gomon et al. (2022); VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Effect of long-term moisture on the mechanical properties of wood: an experimental study Mykola Roshchuk a , Sviatoslav Homon a , Andrii Pavluk a , Svyatoslav Gomon a* , Serhii Drobyshynets b , Mykola Romaniuk 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

* Corresponding author. Tel.: +380679158650. E-mail address: slavagomon@ukr.net

2452-3216 © 2024 The Authors. 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 2023 Organizers

2452-3216 © 2024 The Authors. 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 2023 Organizers 10.1016/j.prostr.2024.04.102