check sfepy.mechanics.tensors.transform_data(). You will need to prepare the transformation matrices for the spheroid yourself - take inspiration in prepare_cylindrical_transform() in the same module .
I have a 3D ellipsoid and I will need to transform the stress tensor (9 components) from cartesian to cylindrical / prolate spheroid coordinates. Is there any function in Sfepy to do it?
Thanks a lot!
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