Abstract:

Plastic strain energy density, stored energy and energy dissipation were discussed in the case of cyclic loading. Because plastic strain density was taken into account by the ESED method, the Neuber rule normally overestimates the local strains while the ESED method underestimates the local strain. The result of the modified ESED method is closer to test results and the estimated life is safe for engineering application. The results predicted by the modified ESED rule are in correspondence with those of fatigue experiments.

Key words: Neuber rule; equivalent strain energy density method; plastic strain energy; stored energy; energy dissipation