So we have this homework problem, it is a rectangular filleted bar and we have to find the minimum thickness. I go and calculated the ratios but here's the problem: (D/d) = 1.375. What may the problem be? Well for this intro to Civil Engr. Course we are taught to find the stress concentration factors using a graph. This graph only has the lines plotted for (D/d) = [ 1.1 1.2 1.3 1.5 ]. How do you guys deal with this when the (D/d) ratio is not listed on a table? Is there some formula to derive the function?
I am a Mechanical Engineering Major taking an intro Civil Engineering Course (Mechanics Materials) , so I have limited knowledge in Civil Engineering terms.