Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Linear Elastic Fracture Mechanics Analysis of a Square Hollow Structural Steel Section Profile
Submission Author:
Albert Santos , DF
Co-Authors:
Albert Santos, Thiago Doca
Presenter: Albert Santos
doi://10.26678/ABCM.COBEM2019.COB2019-0527
Abstract
A square hollow structural steel (HSS) section profile is usually used as structural element in mechanical structure. The square HSS can be used in the lifting mechanism of an agricultural implement, such as a flail mower, because it has high strength-to-weight ratio and uniform strength. The present work presents an analytical and numerical study of a square HSS with nominal size of 70x70x200 mm and wall thickness of 6,35 mm (made of carbon steel AISI 1020). The objective of this work is to perform a yield stress analysis and a fracture analysis using the finite element method. Organized as follows: the analytical formulation for validation of the numerical modeling, modeling steps, stress field analysis and crack analysis. In the yield stress analysis, a longitudinal stress is applied to determine the maximum force that can be applied, so that there is no yielding of the material. The fracture analysis aims to determine the largest length of a crack subjected to a load slightly lower than the maximum permissible load defined in the yield stress analysis. From the results were drawn curves that relate the correction factor and the crack length in order to obtain the stress intensity factor for different loads.
Keywords
Finite Element Method, crack, Stress Intensity Factor
