Structural Simulation | Rubber bushing stiffness | Salome Meca & CalculiX

Note 1 „Elements“:
Abaqus has a special elements for incompressible behavior - “hybrid” elements (8-node brick element - C3D8H), that must be used to model hyperelastic materials. The pressure in this element is taken as an additional independent variable (inaddition to the displacements).
CalculiX does not provide such elements. Consequently, a slight amount of compressibility is required for CalculiX element. (initial value of the Poisson coefficient of 0.475.)
* C3D8 or C3D8H - active degrees of freedom: 1, 2, 3 (x, y, z). For "core" boundary conditions was not necessary to difine freedom 4,5,6 in video.
More information: CalculiX CrunchiX USER’S MANUAL 2.14, 6.8.5 Hyperelastic and hyperfoam materials, Page 216
Note 2 „Material“:
The form of the Mooney-Rivlin strain energy potential is U = C10*(I1-3)+C01*(I2-3)+1/D1*(J-1)^2
C10, C01 and D1 are material parameters.
(C10+C01)*2 = G (where G is Shearmodul of rubber) and
D1=K/2, where K is bulk modulus. K (default) = 14,18 → D1 (default) = 7,09 → 1/D1 (default) = 0.141
More information: ABAQUS Analysis User's Manual, 17.5.1 Hyperelastic behavior of rubberlike materials
Download Files:
CAD (Step file): drive.google.com/file/d/1b2PM...
Input file: drive.google.com/file/d/1VcPK...

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Thank you Andreas, very nice and clear description. I really learned a lot! Vielen Dank!!

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