PSI - Issue 59

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 59 (2024) 595–600

VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Influence of natural composite materials on mechanical properties of wood Sviatoslav Homon a* , Tetiana Dovbenko a , Valentin Savitskiy a , Mykola Khoruzhyi a , Oleksiy Petrenko b , Pavlo Sunak c , Dmytro Y. Kysliuk 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 c Lutsk National Technical University, Lvivska 75, 43018 Lutsk, Ukraine

© 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 A physical method for wood modification using an autoclave system in a “pressure - vacuum” mode is proposed, involving the application of linseed oil with prior impregnation with a complex additive of tar oil and boric acid. Experimental studies of solid and modified pine, spruce, and birch wood under axial compression along the fibers were carried out. The optimal parameters of pressure (1.5 MPa) and temperature (90°C) were determined, under which the samples achieved the highest physical and mechanical properties. The ultimate strength of the modified wood, compared to wood at a standard moisture content of 12%, under optimal modification conditions increased by 27.7% for pine samples, 20.3% for birch, and 26.1% for spruce. The curing time of the composite material was reduced from 7 days to 1 day. © 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, modification, linseed oil, impregnation, temperature, pressure, strength characteristics

* Corresponding author. Tel.: +380962020907. E-mail address: homonsviatoslav@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.2024.04.084