Title : A FINITE ELEMENT BASED FREQUENCY DOMAIN APPROACH FOR FATIGUE LIFE ESTIMATION
Authors : Sumit K Pal, Abrar Ahmed, Jafar S Ali
Publication : 8 - 10, October 2015
Volume : 2
Pages :
Price : 250
Abstract : Fatigue life is generally determined from time signals of loading, usually in the form of stress or strain. This approach is satisfactory for periodic loading but requires very large time records to accurately describe random loading processes. In the present study a compact frequency domain fatigue calculation is utilized where the random loading and response are categorized using Power spectral density (PSD) functions and the dynamic structure is modeled as a linear transfer function. It is described that how this technique can be implemented in the finite element environment to rapidly identify critical areas in the structure and to predict the fatigue life. Such life prediction results are useful for improving the component design at the very early stage.