Low Cycle Fatigue Analysis of High-Strength Aluminum Alloy 2024

The present work represents the effect of strain energy density (SED) on the low cycle fatigue (LCF) behavior of aluminum alloy 2024. For this, strain-controlled fully reversed LCF tests were conducted on aluminum alloy 2024 at the strain amplitude range from 0.50 to 1.40% at a strain rate of 10−3/s. It is observed that the material’s cyclic hardening/softening behavior in the low cycle fatigue region is not only dependent upon the applied strain amplitude but also on the material. The SED is used to represent the cyclic hardening/softening behavior of the material that remains constant for each loading cycle. The finite element based on the Chaboche hardening and Armstrong–Frederick isotropic model was also applied to validate the cyclic stress–strain loops.