Also, I've looked in two of my books and neither seems to give a good explanation of the Stress=My/I equation's derivation. Does anyone have a link explaining how to derive it? I've done a quick Google search without luck, but I honestly have not really dug around. Please, no one spend any time...
Trick question because one creates the other? I'd say it's easier to analyze this as a moment, no?
You're right on the cantilever approach, if you split the pipe in half, as you said. Interesting because I wouldn't have thought to solve it like that.
I agree with that, looking through my handbooks it seemed a cantilever equation was incorrect. Seems obvious, but was worth it to ask. Thanks for the help!
Is the above equation analyzing it as a cantilever? My book doesn't mention end constraints.
This stress will be before any plastic deformation occurs. Thanks for the help.
If you are bending a pipe similiar to this picture:
http://image.shutterstock.com/display_pic_with_logo/85366/85366,1246641681,4/stock-vector-illustration-of-a-powerful-man-bending-a-rod-33069904.jpg
Do you still analyze it as a cantilever beam held on both ends?
I would assume you would use...
"The force at A is equivalent to a force at B plus the moment F(A-B)."
prex, wouldn't that mean the force at A is larger than the force at B? Shouldn't it be the opposite?
Also, this claims slope is the integral of M/EI with respect to x, so slope = Mx/EI, or F(A-B)*B/EI as has been posted...
Well, I'm trying to make sure I have all my "ducks in a row" so that I can predict how this thing will behave. I can control the deflection at A, as there will be a bolt pressing against it controlling it. My goal is to predict how point "B" will deflect relative to "A". I also have FEA to...
Hi guys. This project was put on the backburner for a little while, and I've been back to it. I took your advice and went to the textbooks. I'm really not trying to use this site as a crutch, but I do find it as a good source to clear things up.
It may prove the design doesn't work. It is not...
Can anyone recommend a high precision rod manufacturer to accompany these bearings? The bearing company recommended one to me, but when I contact them, they only do custom orders.
Clyde, thanks. I gave them a call, they're going to get back to me with radial tolerance/play figures.
Pretty pricey, though I suppose you have to pay to get precision parts. They quoted me at $91.10 with a minimum purchase of 10. Do you guys have any other recommendations? I'd like to try a...
Thanks for the link, Clyde. Do you know the tolerancing/precision on these? They don't seem to list it. I clickd on one of the products to get more detailed information on sizing, etc. They list property dimensions by assigning them a letter, but don't seem to list an illustration showing you...
Mike, thank you for the suggestion. I cannot use grease, because the optic will be in a sealed, vacuum tight chamber where any dust or dirt getting in would cause big issues. Would I have some "shaving" if I use dissimilar materials? What would you recommend ?
Could I possibly make some design that would use O-Rings, or maybe some spring washers, that would use three ball bearings. Two with forces in one direction, one with a force in the opposite directin, to try to make any play almost zero?
Also drew a possible V design, but I'm leaning more...
