- #1

c.teixeira

- 42

- 0

Hi,

I am trying to model a simple plane stress problem using Ansys. I am using Ansys 14.0.

The problem is a simple square plate, without a corner, and with a hexagon hole around the midle. The boundary conditions consist of a constant pressure on the top side, and full constrain on the bottom.

In order to study the convergence, I listed the maximum displacements and stress on the entire domain. I realized that the

On the attached image I have ploted the converge study for the [itex]\sigma_{x}[/itex] stress only. Note that on the last mesh, I used a mesh 5 times finer that the previous one. Also, the last meshes are

also,

The thickness is around 0.01 [m].

I used plane182 elements, with element behaviour selected as plane stress with thickness.

Any help is appreciated,

I am trying to model a simple plane stress problem using Ansys. I am using Ansys 14.0.

The problem is a simple square plate, without a corner, and with a hexagon hole around the midle. The boundary conditions consist of a constant pressure on the top side, and full constrain on the bottom.

In order to study the convergence, I listed the maximum displacements and stress on the entire domain. I realized that the

**displacements converged fairly good**. However none of the stresses, namely [itex]\sigma_{x}[/itex], [itex]\sigma_{y}[/itex] and [itex]\sigma_{xy}[/itex], converge. You can see on the attached image, how bad the situation is. I don't know exactly why is this happening.On the attached image I have ploted the converge study for the [itex]\sigma_{x}[/itex] stress only. Note that on the last mesh, I used a mesh 5 times finer that the previous one. Also, the last meshes are

**highly**dense. In fact the 5th mesh from the bottom already corresponds to 50 elements on the right side.also,

The thickness is around 0.01 [m].

I used plane182 elements, with element behaviour selected as plane stress with thickness.

Any help is appreciated,