Dstrueng19:
First of all, those are two different codes, with a five or six year difference in their publishing dates, so in part, one hasn’t caught up with the other, more than likely. Secondly, those are empirical equations for the pin/hole bearing stress, based on research and testing, so its pretty tough to know exactly where all the values and mathematical machinations came from without going directly to the committee people who wrote the code. That is basically a Hertz bearing stress problem for a pin in a hole. It is highly dependant upon the relative dia. of the pin and the hole. The tighter the fit, the bigger the bearing area is, before any yielding even starts to take place btwn. the two parts. Thus Dpin & Dh are prominent in the equations. And, of course, the relative material properties come into play also. Maybe if you showed your actual problem we could make more sense out of it. And, while I looked at that you should click on the eye glasses at the end of the title to you thread on the main forum page. This will bring up some other similar threads, which might enlighten you. Then come back with a slightly more detailed question. Finally, we frown on double posting here at E-Tips, so red flag the post on the Struct. forum and ask the management to remove it for the double posting.
