How to transform stiffness matrix from Polar to Cartesian?

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Ye Pyae Sone Oo

Dear Ganesh Patil,

Perhaps the following document might help.

https://www.athensjournals.gr/technology/2017-4-1-4-Siegl.pdf

In fact, I am not so sure myself. I am also having the same question. But mine is the opposite (that is, to change from rectangular to polar coordinate system). Please look at this one too:

http://www.dtic.mil/dtic/tr/fulltext/u2/683911.pdf

If you have found something else, could you also please let me know?

Regards

Ye Pyae

To any future readers who might share the same interest as this question, please do take a look at the book named 'Handbook of thin plate buckling and postbuckling'.