Análise da vida útil em fadiga de placas finas com perfuração elíptica, através do método dos elementos finitos

Abstract

Due to the huge industry competition and the efforts to reduce the manufacturing cost, the lifespan of mechanical components ended up getting lower. Based on this issue, the purpose of the present study is to verify a computational model whose function is to analyze the lifespan of perforated thin sheets, through the finite element method, using the fatigue life as form of analysis. It was done by means of simulations on software ANSYS® submitting to many magnitudes of tractive and compression stress a thin sheet prototype. The results of these simulations were satisfactory to prove the reliability of the developed computational model. Also, thin plates with elliptical cutouts were analyzed considering different aspect ratios of elliptical perforation and it was observed that the geometric variation of the elliptical hole can improve by up to 78 times the lifespan of a rectangular, thin and perforated plate, for the boundary conditions considered in this study Keywords: Finite Element Method; Fatigue, Thin Plates.