Tham khảo tài liệu 'simulating fatigue cracks growth in spiral bevel gears part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | table. These curve fit values will be used in the crack growth rate models for the numerical analyses. Crack closure concepts will now be extended to investigate the sensitivity of fatigue crack growth rates to low 7 -vaIues. 1 i 1 u f s J 4 1 -ị ị -Ị -ị ---------- I Keff ksi in0 5 Figure Intrinsic fatigue crack growth rate for AISI9310 in 250 oil K 1. Table Intrinsic and non-intrinsic fatigue crack growth rate parameters. Test n c n in cycle ksi in 5 n c in cycle ksi in0 n R -1 Air R Air Air R -Ỉ Oil R Oil 7 Oil Curve Fit Aừ . NA6 Curve Fit Oil . . . NA1 6 Not Applicable NAS A CR 2000-210062 43 Sensitivity of Growth Rate to Low R Table contains results from calculations of AKeffãt different R-values using Equations and . Constant values for Kmax K and SmaxlGo are assumed. Table Calculations to find Keff over a range of R-values for a constant Kmax SIF units are ksi in05. R K Smaxl Go Kmax Rmin K u AKeff 0 716 J u 0 180 0 180 10 000 The .
