A set of new coat hangers is being designed for installation in a college student union. The most likely stress on these coat hangers will be students using them to hang backpacks. The hangers will be mounted to the wall behind point C. It is assumed that the typical repeated loading case will occur with a single backpack on one side and a coat on the other side. Assume the loading case shown below, with {P1} N applied at point A and {P2} N applied at point B. The hangers are to be designed for a {Y} year lifespan under the assumption that the load is applied and removed every 30 minutes, 15 hours per day, 7 days per week, 34 weeks per year. The hanger is made from 1020 steel in an as forged condition (assume Sy= 210 MPa, SUT= 380 MPa). Determine the percent of hangers that are expected to fail before the end of the {Y} year life expectancy. Assume the hanger is loaded by loading A first, then B. The hanger is unloaded in the same order, A first then B. This is nonrotating, so your Csize factor must be based on the 95% tensile area calculation.Csize cannot exceed 1.0) The loading sequence produces a positive torque in the loading, and a negative torque in the unloading. You will have to account for this when you find your mean and alternating values for the stress. Be sure to calculate mean and alternating values for x and xy before combining stresses into mean and alternating von Mises stress values. **Only use Creliability values from the chart. Find the closest one for your solution. Solve, by making generic equations out of the values that are not given yet.

L1 = mm L2= mm L3= mm D1 = mm P1 = N P2 = N Y= = years Hanger is rigidly attached to wall ODI P1 L1 P2 B L2 Dimensional units = mm L3 L1 = mm L2= mm L3= mm D1 = mm P1 = N P2 = N Y= = years Hanger is rigidly attached to wall ODI P1 L1 P2 B L2 Dimensional units = mm L3