Stress and Strain Pressure Vessels

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Discussion Overview

The discussion revolves around a homework problem related to stress and strain in pressure vessels, specifically focusing on determining the pressure corresponding to a given strain and the challenge of finding the Poisson's ratio with limited information.

Discussion Character

  • Homework-related
  • Technical explanation

Main Points Raised

  • The initial poster presents a problem involving the calculation of pressure based on a specified strain and provides relevant material properties such as Young's modulus and yield stress.
  • The poster expresses a desire to understand how to determine the Poisson's ratio given the equation has two unknowns, suggesting a value of 0.3 as a reasonable assumption based on common materials.
  • Some participants note that there appears to be missing information in the original post, indicating potential gaps in the problem statement.
  • One participant provides guidance on how to upload an image that may contain additional information relevant to the problem.
  • A later reply references a previous discussion on the same topic, suggesting that the problem has been addressed before and invites the poster to seek clarification on specific difficulties.

Areas of Agreement / Disagreement

Participants generally agree that there is missing information necessary to fully address the problem, and multiple views on how to proceed with the solution are present.

Contextual Notes

The discussion highlights limitations related to the availability of information needed to solve the problem, particularly concerning the Poisson's ratio and the specifics of the strain measurement.

woodyzzz
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Homework Statement




82d09043-67a3-447f-b216-9c036a895713


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 ?
[/B]
 

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There seems to be some information about this problem missing from your posting ?
 
Nidum said:
There seems to be some information about this problem missing from your posting ?
i was trying to insert a screenshot
 
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 .
 

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