Stress and Strain Pressure Vessels

[woodyzzz]

Homework Statement

E = 290 GNm-2
Yield Stress = 500 MPa

Q. What pressure would a strain of 40 με indicate?

Homework Equations

Hoop Strain. εθ = 1/E (σθ − νσz) = 1/E (pr/t − ν(pr/2t).

The Attempt at a Solution

I am looking for some direction on how to determine the poisson ratio with just the above information?

Given that the above equation has 2 unknown values. If i assign a poisson ratio of 0.3 which would logically not be a bad decision- as most vessels are steel! Then i can easily solve the above for p

But i prefer to understand a way of solving for V

can anyone help ?
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[Nidum]

There seems to be some information about this problem missing from your posting ?

 

[woodyzzz]

There seems to be some information about this problem missing from your posting ?

i was trying to insert a screenshot

 

[Nidum]

Save it on your computer . Check that image is saved in a suitable format such as .jpg or .png . Then use the UPLOAD button bottom right of the reply box .

Or just try pasting the image .

 

[Nidum]

Good - link to image is there now .

This problem has been discussed in an earlier thread :

https://www.physicsforums.com/threads/what-pressure-would-a-strain-of-40-ue-indicate.899151/

If that thread does not give you all the information that you need then please come back with questions about your particular difficulties .