9.5 A polished steel bar is subjected to axial tensile force that varies from 0 to Pmax. It has 2mm deep and having a radius of 3 mm- a groove The theoritical stress concentration factor and notch sensitivity factor at the groove 1.8 and 0.95 respectively. The outer diameter of the bar is 30mm. The ultimate tensile strength of ban 1250 MPa. The endurance limit in reversed bending is 600 MPa. the maximum force that the bar can. 105 cycles with 90% reliability. for Find Carry