20.500.12556/RUL-179744 Bending performance of thermo-hydro-mechanically densified poplar wood effects of ultrasonic pretreatment and thermal posttreatment at different compression ratios Thermo-hydro-mechanical (THM) densification is an effective method for improving the mechanical performance of low-density, fast-growing hardwoods such as poplar. This study examined the bending performance of THM-densified poplar wood at different compression ratios (CR = 0%, 50%, 60%, and 65%), with emphasis on the effects of ultrasonic pretreatment (US) and thermal modification posttreatment (TM), applied individually and in combination. A paired sampling design was used to reduce material variability, and modulus of rupture (MOR) and modulus of elasticity (MOE) were evaluated using linear mixed-effects models (LMM). Bending tests were performed in accordance with EN 310:1993. Increasing the compression ratio led to substantial increases in MOR and MOE; compared with non-densified specimens, MOR increased by approximately 240% and MOE by about 140% at CR = 65%, confirming densification as the dominant factor controlling bending performance. US did not affect non-densified wood but significantly enhanced MOR and MOE after densification, particularly at CR = 50%. In contrast, TM consistently reduced MOR and, to a lesser extent, MOE across all compression ratios. The results demonstrate that the bending performance of densified poplar wood is governed by both compression ratio and compression-dependent treatment effects wood modification plantation hardwoods compression ratio modulus of rupture modulus of elasticity density–property relationship modifikacija lesa plantažni listavci kompresijsko razmerje modul lomne trdnosti modul elastičnosti razmerje med gostoto in lastnostmi true false true Angleški jezik Slovenski jezik Znanstveno delo 2026-02-23 12:16:43 2026-02-23 12:16:50 2026-02-24 04:16:30 0000-00-00 00:00:00 2026 0 0 Str. 1-18 iss. 2 [article no. 284] Vol. 17 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-02-23 630*8 1999-4907 10.3390/f17020284 269289987 Straze_et_al.forests-17-00284.pdf Straze_et_al.forests-17-00284.pdf 1 F3B13903EC65F3CB75A13F5C7FD9BBAC 6db4fc8c143a2715897d34ef5cb4e22f6a9d0feda8a80aa0aba61ba85b250249 3572f516-10a9-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228547 https://www.mdpi.com/1999-4907/17/2/284 1 dcdfd356-10a8-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228545 Biotehniška fakulteta 0 0 0