FATIGUE ANALYSIS USING THE FINITE ELEMENT METHOD
Palavras-chave:
FEM, Fatigue failure, Stress, Continuous structures, Quadrilateral linear elementResumo
Fatigue failure analysis becomes a constant concern when intending to produce mechanical components
subjected to alternating loads and stress concentration. Therefore, the study that provide the development of safe
structures and with longer fatigue life proves to be of significant importance. This article presents the formulation
of the finite element method applied to the fatigue problem in continuous structures from the modified Goodman,
Gerber, and ASME-elliptic criteria. The stress field is obtained using a linear quadrilateral element, with four
nodes per element and two degrees of freedom per node. It is considered two structures of optimized and non-
optimized shape under boundary conditions of crimping and point loading at the free end. The numerical results
obtained showed the effect of fatigue on the structures and among the various fatigue failure criteria. The modified
Goodman criterion was more conservative, since it presented significantly higher results for the safety conditions
considered, followed by the Gerber and, ASME-elliptic criteria, respectively.
