Fatigue crack propagation and strain cycling properties

摘要: A mechanical model of fatigue crack propagation was studied. It is hypothesized that caused by cumulative damage due to strain cycling the material at a tip. With Miner's law and Manson Coffin's cycle fatigue: law, rate can be calculated. The calculated values are compared with data on 7075-T6 Al, 2024-T4 AM 350 stainless steel, 18 Ni maraging steel. experimental correlate reasonably well. results indicate resistance related its capability sustain cycling, i.e. cyclic ductility.