A hot-rolled steel bar is subjected to a repeated axial tensile
load as shown. The material has ultimate tensile stress
S_ut=1300MPa. The bar has a diameter of 30mm. The notch sensitivity
factor, theoretical stress concentration factor, and factor of
safety are q=0.52,K_t=2.42 and n=1 respectively. Find the maximum
force F that the bar can carry for 10^4 cycles at 90%
reliability
Figures
10 Points
Endurance
limit
10 Point
Endurance
strength
10 Points
Fatigue stress concentration
factor
5points
Determination of
force ...