What equation is this defined as?

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The equation in question, \(\gamma = \psi_1 - \psi_2\), is identified as a representation of shear strain rather than a stress-strain relationship. Participants clarified that it lacks a constant of proportionality, which is essential for defining an elastic modulus. The discussion emphasizes the need for further exploration of shear strain concepts in relevant textbooks for a deeper understanding.

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elephunk
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Is this a stress/strain, or elastic modulus equation? or have I got my understanding wrong?
The question asks where does this come from? I've never seen it before maybe someone can expand for me please?

http://i45.photobucket.com/albums/f98/pastilles/equation.jpg

Thanks,
 
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Are you referring to [itex]\gamma=\psi_1-\psi_2[/itex]? It's not a stress-strain relation because there's no constant of proportionality that would correspond to an elastic modulus.

Gamma is often used to denote shear strain, though.
 
Thank you,

I haven't run across this before. I will read some more on shear strain in some textbooks.
Once again thank you :)
 

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