# Stress and Strain Pressure Vessels

1. Jul 6, 2017

### woodyzzz

1. The problem statement, all variables and given/known data

E = 290 GNm-2
Yield Stress = 500 MPa

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

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

3. 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 ?

#### Attached Files:

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Last edited: Jul 6, 2017
2. Jul 6, 2017

3. Jul 6, 2017

### woodyzzz

i was trying to insert a screenshot

4. Jul 6, 2017

### 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 .

5. Jul 6, 2017

### Nidum

Last edited: Jul 6, 2017