ANALISIS TEORITIS DAN EKSPERIMENTAL DEFLEKSI PADA KAYU DENGAN VARIASI JENIS DAN POSISI PERLETAKAN

Abstract

This study aims to determine the value of the deflection of the wood theoretically and experimentally. This study used wood as a test materil with variations in the types of malapoga, teak and palapi. Variations in the position of the placement, A1 = 30 mm x 20 mm, A2 = 25 mm x 24 mm, A3 = 20 mm x 30 mm, using staples at a distance of L/2 mm from the pedestal. The research was conducted at the Mechanical Engineering Laboratory, Faculty of Engineering, Tadulako University. The results showed that the modulus of elasticity of malapoga wood was 630.63 N/mm², teak 1165.36 N/mm², and palapi wood with a value of 1412.00 N/mm². While the maximum deflection value occurs in Malapoga wood with 30 mm x 20 mm placement with a value of 41.32 mm (theoretical), 6.77 mm (experimental), 25 mm x 24 mm placement 28.69 mm (theoretical), 4.91 mm (experimental), 20 mm x 30 mm placement 18.36 mm (theoretical), 4.22 mm (experimental), for teak wood placing 30 mm x 20 mm with a value of 22.35 mm (theoretical), 5.77 mm (experimental), placing 25 mm x 24 mm 15.52 mm (theoretical), 4.57 mm (experimental), placement of 20 mm x 30 mm 9.93 mm (theoretical), 3.77 mm (experimental), while for palapi wood with a position of 30 mm x 20 mm with a value of 18.44 mm (theoretical), 5.13 mm (experimental), placement of 25 mm x 24 mm 12.81 mm ( theoretical), 4.48 mm (experimental), 20 mm x 30 mm placement 8.20 mm (theoretical), 3.39 mm (experimental). Based on the results of this study, it can be explained that as the moment of inertia increases, the deflection value decreases.