Análise estatística usando a distribuição de weibull de ensaios de fadiga axial em juntas soldadas pelo processo GMAW e GMAW-CW

Abstract

Demand for studies about the fatigue issue, comes a growing due to high occurrence of failures in materials resulting from this phenomenon. Accordingly, this study sought to develop an analysis of data from fatigue tests by applying the Weibull distribution data in axial fatigue tests of welded joints by conventional GMAW process and another of the same type in two versions, called GMAW-CW, which has some modifications, as the increment of one wire is not energized, and the versions studied the diameters of the wires used were 0.8 mm and 1.0 mm. The application of the distribution rulered in determining the parameters by the graphical method and then using these parameters in the mathematical expressions, such as reliability, and mean time between failure coefficient of variation. The results of this statistical analysis demonstrated that although the results of fatigue tests of the processes studied apparently are similar, they showed significant differences, which through the Weibull distribution was possible to see.