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Main Steps Modelling a Tensil/Shear Test of a Blind Rivet

Main Steps Modelling a Tensil/Shear Test of a Blind Rivet

Main Steps Modelling a Tensil/Shear Test of a Blind Rivet

(OP)
Hello everybody,

I'm new in Ansys and I need advises in order to model a tensile/shear test of a blind rivet. I've already spent a lot of time trying to get a solution but I achieved... anything!
Let me explain the main steps I do and just tell me if I miss any important step or if I do a big mistake... or just what you think about it, any comment would be welcomed!

You can see the geometry in the attached file.

ELEMENTS
SOLID45 for plates (3-D Structural Solid)
SOLID92 for rivet (3-D 10-Node Tetrahedral Structural Solid)

MATERIAL
Plates: 1. Linear elastic isotropic: E=1.5e5, poison=0.3
Rivet: 2. Linear elastic isotropic: E=2e5, poison=0.27
The materials are both steel 200GPa and 150GPa. I imported the geometry from a Catia v5 file where I worked in "mm" but in Ansys I work with SI (N,m,etc.) so I think that values are correct.

MESH (last week I asked here how to get it)
Plates: Hexa. Sweep, Material 1
Rivet: Tetra. Free, Material 2

Once I mesh the model, I merge the nodes which are in contact between the plates and the head/end of the rivet. Then I create 3 contact pair between volumes (plate1-rivet, plate2-rivet, plate1-plate2) with a friction coefficient of 0.3. Finally I apply a force directly to the nodes which there are in the edge in order to pull from the plates. I think I have to apply boundary constrains but I don't know which are correct... I tried different constrains but any situation worked. (the rivet was fixed and just the plates were deformed, no converge, etc.) Any suggestion?

Thanks in advance.

Ripubcn
 

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