Simulação numérica e design construtal aplicados à flambagem elasto-plástica biaxial de placas com perfurações circulares e elípticas

Abstract

The thin plate is one of the most used elements in structures, being useful for structural resistance. The plate can be found in various industry sectors such as marine, aerospace, automotive and civil. Usually these structures are maintained under compressive loads, which makes the phenomenon the phenomenon of buckling, a structural instability that causes displacement out of its plane. There are two modes of buckling, elastic and elastic, the latter being the one that determines the failure of the plate, since an increment of load is supported by this type of structures, from the beginning of the elastic buckling. For various reasons, plates may have perforations. Thus, it is important to know what happens in the structure with the addition of these holes. Based on this problem, the present work analyzes the elastic-plastic buckling of thin, rectangular plates, with circular and elliptical perforations, under compressive and biaxial stress. The Finite Element method will be used, through the ANSYS® software, as well as the use of the Exhaustive Search technique for the intuition of the simulations and the Constructal Design method for the analysis of the results. As a result of the simulations, it was concluded that the aspect ratio b/a = 0.40 is a behavior change point. In addition, the hole in the Y direction was superior for smaller plates b/a = 0.40.