Hi With the same element size, Poisson's ratio and elastic modulus, why is the arrangement order of the element stiffness matrix obtained in ANSYS different from that in sfepy? Can you tell me which finite element book you are referring to? Secondly, I want to set different materials for different finite element elements. What functions do I need to call?
Best， Lee
Hi Lee,
On 05/10/2021 04:21, 979439736 via SfePy wrote:
Hi With the same element size, Poisson's ratio and elastic modulus, why is the arrangement order of the element stiffness matrix obtained in ANSYS different from that in sfepy? Can you tell me which finite element book you are referring to? Secondly, I want to set different materials for different finite element elements. What functions do I need to call?
The ordering of FE nodes in an element is based on the diagrams in the sfepy manual [1] (but the indices start from 0!). For vector or other fields with several components, the global DOF ordering is nodebynode (u_0, u_1, …, u_X in node 0, u_0, u_1, …, u_X in node 1, …), see also [2].
The second question is covered in [3].
r.
[1] https://sfepy.org/docdevel/users_guide.html#femesh [2] https://sfepy.org/docdevel/src/sfepy/discrete/variables.html?highlight=crea... [3] Globally (in a state vector), the DOFs are stored
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