DETERMINATION OF SCREW WITHDRAWAL STRENGTH OF WOOD-BASED SANDWICH PANELS LAMINATED WITH POPLAR PLYWOOD AND REINFORCED WITH BFRP, GFRP AND JUTE FABRIC

Authors : Abdurrahman Karaman

Pages : 1-11

View : 87 | Download : 139

Publication Date : 2025-12-31

Article Type : Research Paper

Abstract :Sandwich panels are favorable materials for structural or non-structural components due to durability, lightness, and longevity in service life. The strength of a structural system often depends on the interconnections between the components of the structure. Screws are one of the most widely used fasteners in construction. In this study, the screw withdrawal strength of wood based sandwich panels reinforced with basalt fiber reinforced polymers (BFRP), and glass fiber reinforced polymers (GFRP), and jute fabric via polyurethane adhesive (PUR-D4) was investigated. In predicting the screw withdrawal resistance, withdrawal load capacity, density, and withdrawal stiffness of the wood based materials BFRP, GFRP, and jute fabric in each layer, were considered. Moreover, the screw withdrawal strength of the panels was examined. Screw withdrawal tests of panels were conducted according to TS EN 13446 standard. The highest screw withdrawal strength was obtained for the based sandwich panels reinforced with GFRP (9.31 N/mm2). Furthermore, the difference between experimental and predicted screw withdrawal resistance changed from 4% to 9%. Besides, the highest air-dry density was obtained for the based sandwich panels reinforced with GFRP (0.620 g/cm3). Furthermore, the difference between experimental and predicted screw withdrawal resistance changed from 1.2% to 2%. In addition, the wood based sandwich panels reinforced with GFRP had a considerable increase in the screw withdrawal strength compared with the unreinforced, fabric jute, and BFRP reinforced samples.
Keywords : Poliüretan tutkalı, Basalt kumaş, cam elya kumaş, vida çekme dierenci

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