A material with a tensile strength of 350 MPa is loaded cyclically about a mean stress of 70 MPa. If the stress range that will cause fatigue fracture in 105 cycles under zero mean stress is ±60 MPa, what stress range about the mean of 70 MPa will give the same life? (Hint: Use Goodman's relation)
A material with a tensile strength of 350 MPa is loaded cyclically about a mean stress of 70 MPa. If the stress range that will cause fatigue fracture in 105 cycles under zero mean stress is ±60 MPa,...
The cantilevered bar in the figure is made from a ductile material and is statically loaded with Fx-320 lbf, Fy = 255 lbf, and F- 105 lbf. The critical stress element experiences = 58.4 kpsi, σ x ,axial =0.407 kpsi and τ = 15.6 kpsi. Determine the minimum factor of safety for fatigue at point A, based on infinite life. If the life is not infinite, estimate the number of cycles. The force F is applied as a repeated load...
Question 1 An end capped cylindrical pressure vessel with internal pressure p = fully supported at one end, is also subjected to a force F= 10 kN in the y direction at the other end as shown. The internal diameter of the pressure vessel is d= 160 mm and its thickness is t= 10 mm 3 MPa, assumed to be Determine the magnitudes of the stress components in x, y and z coordinates at points H and K and sketch...