- Problem 1 A Machine Part Made Of Steel 5 280 Mpa Su 330 Mpa Is Loaded With A Combination Of Bending Axial And 1 (39.26 KiB) Viewed 22 times
- Problem 1 A Machine Part Made Of Steel 5 280 Mpa Su 330 Mpa Is Loaded With A Combination Of Bending Axial And 2 (39.26 KiB) Viewed 22 times
Problem 1 A machine part made of steel (5, = 280 MPa, Su = 330 MPa) is loaded with a combination of bending, axial, and torsion such that the listed stresses are created at a critical location, where a notch exists. The stress concentration factors have been determined as shown. The stresses are assumed to be in phase, meaning max and min values are occurring at the same rate and at the same time. The completely adjusted endurance limit has been determined as S. = 83 MPa. Determine the fatigue life of the machine part using the Goodman criteria, and check for yielding. Assume f = 0.9. Stress Type Description Value Kt for stress type Bending Stress Completely reversed Maximum of 60 MPa K+ = 1.4 Axial Stress Constant 20 MPa K = 1.1 Torsional Stress Repeated O MPa to 40 MPa Kis = 1.8 Multiple Choice Questions(Select the most nearly correct answer considering rounding errors):