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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Geometric stiffness matrix for solid elements › Reply To: Geometric stiffness matrix for solid elements

October 24, 2024 at 11:53 am
Akshat Gupta
Ansys Employee

Hello,

Thanks for your query.

In section 3.4, ‘Stress Stiffening’, you can find sub-section 3.4.3 ‘, Implementation’, which discusses how these matrices are calculated. Equation (3-60) onwards, will give more clarity in this regard.

Also, please mention the procedure (commands) used to determine APDL geometric stiffness.

Are you taking out element stiffness or global stiffness?

In addition, I want to check the procedure you are using to calculate the stiffness theoretically. What kind of elements/mesh are you using?  Is the mesh/element type comparable to the APDL mesh and elements being used?

Thanks.