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4.1.2.4 Ellipsoidal Fiber Distribution Veronda-Westmann
The material type for a Veronda-Westmann material with an ellipsoidal continuous fiber distribution is “EFD Veronda-Westmann”. The following material parameters need to be defined:
| <c1> | First VW coefficient | [P] |
| <c2> | Second VW coefficient | [ ] |
| <k> | Bulk modulus | [P] |
| <beta> | parameters | [ ] |
| <ksi> | parameters | [P] |
The stress for this material is given by, Here, is the stress from the Veronda-Westmann basis (Section 4.1.2.15↓), and is the stress contribution from the ellipsoidal fiber distribution (Section 4.1.2.2↑).
Example:
<material id="1" type="EFD Veronda-Westmann"> <c1>1</c1> <c2>0.5</c2> <k>1000</k> <beta>4.5,4.5,4.5</beta> <ksi>1,1,1</ksi> <mat_axis type="local">0,0,0</mat_axis> </material>