Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber

Rocznik Ochrona Środowiska 2025, vol. 27, pp. 373-378

Pavel Koval¹ , Stefania Mironova¹ , Alexander Shkarovskiy² , Shirali Mamedov¹ This email address is being protected from spambots. You need JavaScript enabled to view it., Egor Danilov¹ 

	1. Saint Petersburg State University of Architecture and Civil Engineering, Russia 2. Koszalin University of Technology, Poland
	This email address is being protected from spambots. You need JavaScript enabled to view it.
	https://doi.org/10.54740/ros.2025.030

This paper presents a study of hygro fatigue - the effect of repeated cyclic moistening on the strength of laminated veneer lumber (LVL). The method of cyclic humidity used for laminated veneer composite material in the work is described. Samples made of such material were pre-conditioned for extended periods under high-humidity conditions. Cross-fibre compressive strength across fibres in the plane of veneer layers has been investigated. The influence of technological weakening (notching) on the crack opening process of peeled veneer has been proven. It has also been revealed that the area around the knot of the tree, which leads to the curvature of the growth layers, is a place of crack concentration. A significant reduction in the strength properties of multi-layer laminated veneer lumber under cyclic moistening (up to 18% after three cycles) has been proven. The dynamics of crack growth due to the influence of the moisture factor is given. The need to treat LVL elements with wax-containing compositions to reduce the negative impact of humidity on the engineering wood was confirmed.

multi-layer material, glued veneer, wooden structures, strength, cyclic moistening, shrinkage cracks, hygro fatigue

AMA Style
Koval P, Mironova S, Shkarovskiy A, Mamedov S, Danilov E. Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber. Rocznik Ochrona Środowiska. 2025; 27. https://doi.org/10.54740/ros.2025.030

ACM Style
Koval, P., Mironova, S., Shkarovskiy, A., Mamedov, S., Danilov, E. 2025. Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber. Rocznik Ochrona Środowiska. 27. DOI:https://doi.org/10.54740/ros.2025.030

ACS Style
Koval, P.; Mironova, S.; Shkarovskiy, A.; Mamedov, S.; Danilov, E. Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber Rocznik Ochrona Środowiska 2025, 27, 373-378. https://doi.org/10.54740/ros.2025.030

APA Style
Koval, P., Mironova, S., Shkarovskiy, A., Mamedov, S., Danilov, E. (2025). Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber. Rocznik Ochrona Środowiska, 27, 373-378. https://doi.org/10.54740/ros.2025.030

ABNT Style
KOVAL, P.; MIRONOVA, S.; SHKAROVSKIY, A.; MAMEDOV, S.; DANILOV, E. Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber. Rocznik Ochrona Środowiska, v. 27, p. 373-378, 2025. https://doi.org/10.54740/ros.2025.030

Chicago Style
Koval, Pavel, Mironova, Stefania, Shkarovskiy, Alexander, Mamedov, Shirali, Danilov, Egor. 2025. "Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber". Rocznik Ochrona Środowiska 27, 373-378. https://doi.org/10.54740/ros.2025.030

Harvard Style
Koval, P., Mironova, S., Shkarovskiy, A., Mamedov, S., Danilov, E. (2025) "Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber", Rocznik Ochrona Środowiska, 27, pp. 373-378. doi:https://doi.org/10.54740/ros.2025.030

IEEE Style
P. Koval, S. Mironova, A. Shkarovskiy, S. Mamedov, E. Danilov, "Influence of Cyclic Humidification on the Strength of Multi-layer Laminated Veneer Lumber", RoczOchrSrod, vol 27, pp. 373-378. https://doi.org/10.54740/ros.2025.030