The power-law cyclic stress-strain relationship and the Basquin/Coffin-Manson strain-life equation have gained widespread acceptance for the purposes of both describing and assessing material fatigue response. For some common metals however these equations are inadequate. Even when functional forms describe the material fatigue properties well, most life prediction programs generate digitized parameter-life tables to avoid repeatedly solving by iteration non-linear parameter-life equations. To address these issues, this paper proposes that a direct digitization of material fatigue properties be used. Several examples are given which illustrate how digitizing material properties can eliminate poor fits of test data, and thus significantly improve fatigue life predictions.
展开▼
