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periodic boundary conditions

Periodic Boundary Conditions and Contact Elements with Cohesive Zone Law in Ansys

Submitted by Andreas.Ferber on
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contact
periodic boundary conditions
cohesive zone

Hi all,

 

I have a problem with periodic boundary conditions using contact elements with a cohesive zone law in Ansys.

In my micromechanical simulations of an RVE with periodic boundary conditions I would like to have a predefined fracture path. My aim is to realize the fracture path with voronoi cells. There I get problems at the boundary of the periodic domain.

A picture of the simplified problem is attached here:

http://dl.dropbox.com/u/4920002/PBC_CZM.png

 

Periodic boundary conditions on a non square area

Submitted by Andreas.Ferber on
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periodic boundary conditions

 Hi all,

I have a Problem concerning periodic boundary conditions. The problem is

that the periodic repeating area is not a square one but has an

arbitrary shape. An example is attached to the here:

http://dl.dropbox.com/u/4920002/Bild1.png

If periodic boundary conditions do not respect stress continuity at the boundary....

Submitted by CeciliaPisano on
unit cell
periodic boundary conditions
Cohesive elements
convergence difficulty

Hi everybody,

have you ever tried to implement in Abaqus periodic boundary conditions?

I am doing this. Particularly, I am applying PBC to unit cells constituted of a clay particle in an epoxy matrix.

When I apply PBC in case of transverse shear, I have convergence problems using Abaqus standard,

so I have to use an algorithm of stabilization but because of this one

I have to renounce to the stress continuity between opposite boundaries of the unit cell.

Do you think this is normal or I am doing some mistakes?

PBC in ABAQUS

Submitted by ABAqirl on
research
periodic boundary conditions

Hello everybody, i am new in abaqus, is anyone who knows how to apply periodic boundary conditions, for example for unit cell. The piece of code would be very much appreciated

 

for example ´

if i have on the left hand side node set NSET1, on the right hand site NSET2 than i should use equation like this for periodic boundary conditions in x-direction?

*EQUATION

NSET1, 1,1, NSET2, 1, 1????

Please help 

Best regards

ABAgirl

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