Efeito comparativo do afilamento em uma viga engastada-livre de seção-caixão com paredes finas constituídas por material compósito e convencional

Abstract

The present work presents a analysis about the structural behavior of a beam made of thin walls, with coffin-type cross-section, concerning the normal stresses and shear. It was considered a beam with and without presence of tappering, with free end boundary conditions, simulating an aircraft wing. The beam was loaded by concentrated and eccentric loads acting perpendicular to its axis, providing the flexion, torsion and shear combined efforts. Analytical developments of structural behavior applied by thin walls beams were compiled by analytical methods, considering the structural idealization of Booms, using isotropic and composites materials. Normal stresses and critical shear stress were considered for four different models of material combination and structural idealization, and compared to the acquired with finite element numerical modeling, performed with the aid of NX NASTRAN® (2016) software. The deviations obtained with the results comparisons were satisfactory. It highlights the tappering impact on the inertia and beam mass properties.