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I have a question concerning the von Kármán equations. I want to better understand the compatibility relation. The wikipedia article states that:

https://en.wikipedia.org/wiki/Föppl–von_Kármán_equations

"The components of the three-dimensional Lagrangian Green strain tensor are defined as .."

What follows looks much like the Green-Lagrange strain tensor. But, as I understand the Green-Lagrange strain tensor is used in the total Lagrange formulation and thus not compatible to the Cauchy stress (which is why one would use the 2nd Piola-Kirchhoff stress tensor).

Is the Green strain tensor as written in Wikipedia different from the Green-Lagrange strain tensor? The wikipedia-Link to finite strain theory didn't help.

Thanks,

MarkoA

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# Which strain tensor is used in Föppl–von Kármán equations?

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