Reply To: I’ve been trying to implement eigenvalue buckling simulation for solid elements

[henrich1klassen]

 

In ANSYS APDL, the geometric stiffness matrix for solid elements is often fully populated with non-zero elements due to the nature of how the stiffness matrix accounts for deformation in various directions, including coupling effects between different nodes and degrees of freedom. This doesn’t indicate an incorrect calculation. Instead, it’s likely related to the complexity of the solid element formulation, where even small geometric changes can introduce stiffness contributions in all directions. Cook’s and Borst’s theories might present a simplified view, but finite element software like ANSYS tends to handle more complex interactions. worms zone io mod apk