Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
DYNAMIC CHARACTERIZATION OF YOUNG AND SHEAR MODULUS OF THE BAMBOO
Submission Author:
Leonardo Rodrigues da Silva , PR
Co-Authors:
Leonardo Rodrigues da Silva , GIOVANNI BRATTI, Fabiano Ostapiv
Presenter: Leonardo Rodrigues da Silva
doi://10.26678/ABCM.COBEM2021.COB2021-0392
Abstract
In recent years, it has been increasing the use of bamboo in various engineering applications. For the projects of these applications may be carried out in a precise and reliable way, it is essential to know the dynamic behavior of their materials. For this, it is essential to know the mechanical properties of bamboo. This work presents a methodology for characterizing the mechanical properties of bamboo, where dynamic flexion and torsion tests were performed to determine the elasticity and shear modulus of bamboo. The bending tests were performed with cantilever beams made from bamboo samples with different sizes. The natural frequencies of the beams were measured and, using the Euler- Bernoulli equations, the Young modulus of the samples could be determined. The shear modulus was determined in a similar way, however, by performing torsion tests of samples with a disk at the tip. To validate the characterized properties, a four-floor portico was built and the first natural frequencies were measured. Through a numerical modal analysis of this portico, modeled using the finite element method and using the characterized properties, it was found that the experimental and numerical natural frequencies converged. Furthermore, the results obtained in this work are in good agreement with results presented in the literature.
Keywords
bamboo, boundary conditions, natural frequency, Dynamic Behavior
