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Development of Methodology to Estimate the Fatigue Life of the Structure

Roshan Dsouza, Praveen M P

In this present study, a methodology is developed to estimate the fatigue life of the structure from acquired strain data for variable amplitude loading condition. The methodology is based on the nominal stress method and the method is used creating a software module. Rainflow cycle counting method is use to extract the cycles from the strain data. Then the Palmgren-Rule is utilized to calculate cumulative damage. In addition, the fatigue life of a cantilever aluminium plate under certain loading conditions is analysed. The results are compared with the professional fatigue analysis software "N-SOFT FATIMAS".