Recent content by Turbine

Excellent information! Thank you very much. I am working on this as a senior capstone project for mechanical engineering. We're taught so much to keep things below yield, not much has been discussed in my courses about designing in the plastic region. I discussed this with one of my professors...

Hi guys, Working on a 50-ton hydraulic press design using a standard H-frame design, like this: I'm working on the design of the vertical members. Similar to the photo above, the verticals have 1.25" diameter holes drilled for pins that support the horizontal bed. The problem: while...

The size isn't a factor in this question, simply trying to understand the differences in the called-out supports. As for press designs, a single pin connection is standard on many smaller H-frame presses (I'm looking at 40-tons or less). This allows for an adjustable lower platform. I am a...

Thank you for the quick response. In the diagram, those "pins" are literally just that, about 1-1/4" diameter steel rods. The beam is about 48" long. Application is a hydraulic press. I could just as well design it with a pin support underneath one end of the beam to act as a roller, which would...

Hi guys, Hopefully a fairly simple question. All beam formulas I've come across, whether in my own textbooks or Machinery's Handbook, have two sets of formulas for beams. One will be for "simply supported", where one end is pinned and the other end is a pin-roller. The other connection type is...

After going through it again, I do indeed get |x+4|/3 < 1, so... -3 < x+4 < 3 finally... -7 < x < -1Checking the points... plugging -7 in I do find it converges to 0. Plugging -1 in and doing a ratio test again, I get it converges to 1, hence diverges. My final divergent quotient is...

Wow... yep, needless to say you are most definitely correct... the algebra always gets me! Let me re-work this now... Thank you!

Sure thing! Here's everything I've got... \sum \frac{(x+4)^n}{(2n-1)3^(n-1)} (again, it's supposed to be (...)3^(n-1) ) Now I do (or try to) do the ratio test... L = LIM \frac{(x+4)^n+1}{(2n+1)3^(n)}\frac{(2n-1)3^(n-1)}{(x+4)^n} From that (and it isn't displaying properly), I do...

Homework Statement First of all, in the below equation, it won't let me display it correctly. In the denominator is supposed to display 3^(n-1), NOT 3(n-1). So, I need to find the convergence interval and check the points. So far, I've found the intervals and checked both of the points to...