Recent content by dfitz1000

I don't doubt what you're saying but I just need to calculate the max von Mises stress in the bend. Just assume there is no flow.

Well, it's just a theoretical question. I need to find the maximum theoretical stress in the 90o pipe bend under 4 bar internal pressure. It's a static analysis I'm doing so there's no need to consider thrust or anything like that. I do appreciate your reply though.

Hmmmmm, well, the bending moment is force x distance so you need to find the force at the point of interest...can you post the full question?

That's pretty much what I'm looking for minger. Roark's handbook you say, do you know any other books with a similar analysis? Thanks for your help so far.

The internal pressure is around 4 bar.

Hi, I'm trying to calculate the max (von Mises) stress in a 90o pipe bend. Now I know (I think) how to do it for a straight pipe, but can anyone point me in the right direction as to where I can find this analysis for a pipe bend? Thanks in advance.

If you're given the bending moment diagram, it's just a case of going to 0.9m on the x-axis and reading off the corresponding bending moment.

Thanks elect_eng...the scan is quite hard to read but I think I got it...much appreciated.

Thanks minger. I'm going to try mesh finer and finer and then see what the graph looks like, if it continues to converge, then so be it and if it doesn't I may be back with more questions! I'm also going to try using different element types.

Sorry, yes indeed there was a typo, the first term should have been cubed rather than squared.:redface:

Hi, I've been trying to solve this equation for hours no, hoping somebody here can help. I have the equation: -2m2w3 + 15Bmw2 - 27B2 = 0 where m, B are unknown constants and I'm trying to solve for w. Is there a general formula for solving cubic equations? Thanks in advance.

Apologies for not being clear but what I meant was that as I refine the mesh, it approaches some value (not zero, actually it's around 6.6 MPa). I understand the first graph is misleading, just ignore the axes and look at the shape of the graph (it's the only graph I could find quickly on google...

Hi, I just have a quick question about mesh convergence, hopefully someone can help. I have a model of a pipe bend that I've meshed using ABAQUS and then found the location and value of the maximum von Mises stress. I then refined the mesh a few times and plotted the max stress against the...