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Started By
Message
Engineering Calculation Question
Posted on 2/3/16 at 1:09 pm
Posted on 2/3/16 at 1:09 pm
Trying to find burst/collapse of a cylinder. At one cross section there are multiple tapped holes that get pretty close to penetrating the ID.
Any ideas on determining this without FEA?
Any ideas on determining this without FEA?
22
Posted on 2/3/16 at 1:09 pm to redbaron
Tree fiddy.
Posted on 2/3/16 at 1:13 pm to soccerfüt
288
Posted on 2/3/16 at 1:14 pm to redbaron
quote:
Trying to find burst/collapse of a cylinder
Need to crush a beer can against your forehead?
Posted on 2/3/16 at 1:14 pm to redbaron
Try reading the textbook, studying, and going to your professor's office hours. No one is going to do the work for you in the real world
Posted on 2/3/16 at 1:15 pm to redbaron
quote:
penetrating the ID.
Hope that id is tight enough and she aint some skank hoe
Posted on 2/3/16 at 1:16 pm to redbaron
What is the cylinder made of?
What is the temperature?
Where is the specific gravity?
What is the pressure in mm Hg?
What is the temperature?
Where is the specific gravity?
What is the pressure in mm Hg?
This post was edited on 2/3/16 at 1:17 pm
Posted on 2/3/16 at 1:16 pm to redbaron
You could assuming the OD is the bottom of the deepest hole and do that. I think that would be absurdly conservative, but it's a start.
FEA would be the only way that I'm aware of to truly determine the effect that would have on fail pressure.
FEA would be the only way that I'm aware of to truly determine the effect that would have on fail pressure.
Posted on 2/3/16 at 1:18 pm to redbaron
Depends on what kind of vessel. I'd de-rate linearly from original wall thickness but I sure as shite wouldn't pressure up until I had a new stamp.
Posted on 2/3/16 at 1:21 pm to Pectus
You're a geologist.
Posted on 2/3/16 at 1:21 pm to redbaron
p × r² × h
Posted on 2/3/16 at 1:22 pm to thegreatboudini
quote:
You're a geologist.
Everything on Earth is made from materials from Earth.
Try again.
Posted on 2/3/16 at 1:23 pm to Pectus
Except humans, we're made of star dust.
Posted on 2/3/16 at 1:31 pm to Pectus
quote:not true.
Everything on Earth is made from materials from Earth.
This Paperweight is made from materials not from this earth.
Posted on 2/3/16 at 1:55 pm to redbaron
You mean a tubular.
Burst disks on tubulars are usually milled to a thickness that causes it to fail at a certain internal or external pressure. If you knew where this came from, you could just look it up.
That's about all you can do without some more info.
Burst disks on tubulars are usually milled to a thickness that causes it to fail at a certain internal or external pressure. If you knew where this came from, you could just look it up.
That's about all you can do without some more info.
Posted on 2/3/16 at 1:57 pm to redbaron
Small diameter holes shouldn't effect it at all. Many layered vessels have weep holes which penetrate to the inside she'll course with no affect to the MAWP. Do you need the burst pressure equations?
Posted on 2/3/16 at 2:00 pm to redbaron
Assuming you could use Barlows formula on an ideal cylinder, but it won't take into account the holes that are nearly penetrating the ID
Posted on 2/3/16 at 2:01 pm to redbaron
quote:
penetrating the ID
ID penetrate
Posted on 2/3/16 at 2:08 pm to redbaron
Thinnest portion would be the OD. Pretty easy pressure calculations after that (gotta get material specs though)
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