I am just trying to model a concrete cube with a rubber layer on the top of it...both concrete and rubber layer has linear elastic properties...now when I am giving a pressure load on the top of the rubber, the rubber layer gets spreads to a large extent. How is it happening? I was under the impression that once the rubber gets compressed fully the concrete should come in to picture thereafter and get the pressure.
Of course, the concrete gets the pressure at the same time as the rubber. This is simply equilibrium. Rubber is much softer than concrete so that rubber shows large deformation before visible concrete deformation occurs. The scaling of the deformation has the effect that you only see deformation of the rubber. It is all related to your elastic data. Please give your chosen elastic data for rubber and concrete. (By the way: rubber is not linearly elastic. You should at least use the simple neo-Hooke model). For a better understanding of your results, you should also state what quantity is shown in the heatmap (colour shading).
Thank you for your response....Manfred Staat .....please find attached the CAE file of the model Nils Wagner
The concrete cube size is itself 150 mm x150 mm x150 mm...and the deflection due to the pressure is showing in meters....how can that be possible...? PFA image...the heat map shows the vertical deflection of the model
The reason behind such behavior of rubber is I am using linear quadrilateral elements with reduced integration solver...This solver takes only one integration point for an element and produces highly softer element with inaccurate results...full integration solver is recommended to avoid such mistakes in analysis.
please refer to the youtube video:
https://youtu.be/38bRuW84Zew
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