Calculating Poisson's Ratio: Young, Bulk, & Relation

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    Poisson's ratio Ratio
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Discussion Overview

The discussion revolves around the relationship between Young's modulus, Bulk modulus, and Poisson's ratio, specifically how to calculate Poisson's ratio using these moduli. Participants express varying levels of familiarity with the concepts and seek clarity on their interconnections.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant expresses a lack of understanding of Young's, Bulk, and Poisson's ratios and seeks guidance on their relationship.
  • Another participant suggests referring to a table of conversion formulas from Wikipedia to find relevant information.
  • A participant acknowledges having researched the individual ratios but struggles to apply them to calculate Poisson's ratio based on the given information.
  • One reply mentions a specific formula that can be used to calculate Poisson's ratio given Young's and Bulk moduli, although the derivation of the formula is not provided.
  • A later reply confirms that a specific formula was found useful for calculating Poisson's ratio.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the derivation of the formulas or the application of the concepts, indicating that multiple views and levels of understanding remain present in the discussion.

Contextual Notes

Some participants reference external sources for formulas, but there is uncertainty regarding the derivation and application of the formulas discussed. The discussion does not resolve how to apply the concepts effectively.

joemte
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Homework Statement
Given that the sample of PVC has a Young's modulus of 3.3GPa and a Bulk modulus of 4.6GPa Calculate Poisson's ratio
Relevant Equations
None
I've never really heard of Young, Bulk, or Poisson's ratio before. I have done some research but I can't seem to find the relationship between the three in order to calculate Poisson's ratio. Could someone please point me in the right direction?

Thanks
 
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Hi,

Yes I have individually researched Bulk, Young, and Poisson's ratio, but from what I've researched I am not sure how to apply it all to calculate Poisson's ratio with the information I have been given in the question.
 
Well, there is a formula in that reference that will enable you to calculate PR given Young's and Bulk moduli. As to "understanding how to apply it all", I couldn't tell you off the top of my head how that formula is derived, but there it is and you can use it.
 
Hi Chester,

Thank you I didn't see this table, the following formula provided me with the correct answer:

(3*K-E) / 6K
 

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