Dynamic mechanical analysis of fpu bonded beech wood at various temperaturesCapuder, Martin (Avtor) Azinović, Boris (Avtor) Pondelak, Andreja (Avtor) Rutkowski, Paweł (Avtor) Szumera, Magdalena (Avtor) Schwarzkopf, Matthew (Avtor) Kwiecień, Arkadiusz (Avtor) Śliwa-Wieczorek, Klaudia (Avtor) Pečnik, Jaka Gašper (Avtor) dynamic mechanical analysisFPUbeech woodThis study investigates the dynamic mechanical properties of flexible polyurethane (FPU) adhesives bonded to European beech wood (Fagus sylvatica L.) using Dynamic Mechanical Analysis (DMA) over a range of temperatures and frequencies. Samples included clear beech wood and three-layered composite (beech:FPU:beech). DMA tests were performed using a three-point bending setup at 1 Hz and 10 Hz in the temperature range from -120°C to 140°C. The results demonstrated high thermal stability and strong bonding performance of FPU adhesives on beech wood. Frequency-dependent responses varied among FPU types but resembled the behavior of solid wood at lower temperatures. This confirms the suitability of DMA for evaluating adhesive-wood composite behavior under dynamic conditions. The combination of FPU adhesives and beech wood showed potential for thermally stable and energy-dissipating bonded assemblies.World Conference on Timber Engineering20252025-08-27 11:50:30Neznano23426UDK: 624DOI: 10.52202/080513-0197COBISS_ID: 245760003OceCobissID: 239752963sl© WORLD CONFERENCE ON TIMBER ENGINEERING 2025 (WCTE 2025)