Experimental and analytical study on the behaviour of adhesive layers in hybrid joint for wooden structures
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Kawecki Bartosz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 26 |
| Numer artykułu: | 104 |
| Strony: | 1 - 29 |
| Impact Factor: | 4,4 |
| Web of Science® Times Cited: | 0 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Finansowanie: | The grant was financed in the framework of the pro-quality program of Lublin University of Technology “GRANTS FOR GRANTS” (Grant no: 1/GnG/2023). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| This research explores the mechanical behaviour of hybrid timber-steel joints that use adhesive bonding and mechanical fasteners. Spruce wood and S235 steel plates were used to create double-lap specimens in the experimental program, which were then joined by polyurethane (PUR) or polyvinyl acetate (PVAc) adhesives. The fabrication process involved creating eighteen specimens. Bolts were used to clamp the parts with proper clamping pressure during adhesive curing. Surface deformations were tracked using Digital Image Correlation (DIC) while tests were done under displacement control. The symmetrical load transfer, as verified by DIC analysis, permitted the application of analytical models for double-lap joints. The stiffness of PUR and PVAc joints, measuring 156.54 kN/mm and 146.19 kN/mm respectively, resulted in adhesive stiffness values of 123.8 MPa/mm and 93.9 MPa/mm. Elastic modulus was found to be 11.93 GPa and shear modulus 1.17 GPa, determined with an indirect method, based on the measurements of elastic strains and deformations. According to the analysis, approximately 47% of the total displacement resulted from the wood shear deformation. Different failure mechanisms were uncovered by the DIC-based and empirical fracture analysis. The study indicated that higher stress levels were related to cohesive failures (COH) but not adhesive failures (ADH). No clear correlation was observed for differences in how symmetrical the failures were or when they occurred (simultaneously or not). Both shear and peel stress distributions were derived. Shear stresses obtained for PUR and PVAc specimens in dependence on COH/ADH failure were equal to 5.51/4.53 MPa and 5.50/3.65 MPa, consecutively. While peel stresses were equal to 6.14/5.04 MPa and 6.23/4.14 MPa, consecutively. A parametric study was carried out to improve comprehension of how analytical model characteristics influence results. This involved analysing variations in adhesive stiffness, wood’s elastic and shear modulus, noting the resulting shifts in stresses and the layout’s overall displacements. The results offer a solid basis for future Finite Element Modelling and optimisation of hybrid timber-steel connections. |
