BAP121
Mechanical
- Apr 22, 2009
- 5
Hello sexy eng-tipsters,
I am trying to create a finite element model of a concrete slab with a floating screed layer ontop to try and see the impact on the floating screed layer transient analysis. There is a hard plastic membrane between the two layers so it is as if the screed layer is resting on top of the concrete slab.
To start with, I have modelled the problem in 2D, using PLANE42 elements and CONTAC178 to join the 2 layers together. I ran the problem without gravity, but this gave undesirable effects as gravity is a major factor binding the screed layer to the concrete slab. I therfore need to apply gravity before undertaking the transient analysis. Every time i try this, I end up with far higher displacements from movement under gravity than from the transient impulse i apply.
I know this is probably simple but can someone please simply explain to me how I can apply displacement/stress due to gravity so it is in equilibrium and then do the transient analysis.
Many tanks,
BAPS
I am trying to create a finite element model of a concrete slab with a floating screed layer ontop to try and see the impact on the floating screed layer transient analysis. There is a hard plastic membrane between the two layers so it is as if the screed layer is resting on top of the concrete slab.
To start with, I have modelled the problem in 2D, using PLANE42 elements and CONTAC178 to join the 2 layers together. I ran the problem without gravity, but this gave undesirable effects as gravity is a major factor binding the screed layer to the concrete slab. I therfore need to apply gravity before undertaking the transient analysis. Every time i try this, I end up with far higher displacements from movement under gravity than from the transient impulse i apply.
I know this is probably simple but can someone please simply explain to me how I can apply displacement/stress due to gravity so it is in equilibrium and then do the transient analysis.
Many tanks,
BAPS