Nonlinear strain-displacement relation in spherical coordinate?

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Hamed Asadi

Hi.

You may find them in Prof. Amabili's book.

"Nonlinear vibrations and stability of shells and plates".

Hassan Zafarmand

Thanks Dear Hamed ;)

Dawood Yazdani

Hi, I think that you can derive these equations yourself. nevertheless attached file would help you.

Thanks dear Dawood,

I've obtained the formulation by myself, I need a reference to be cited for the formulation.