November 17, 2018 at 9:22 pm
November 18, 2018 at 2:58 ampeteroznewmanSubscriber
Click on Extrude 17 and review the settings in the Details window. You want to Add Frozen to avoid having the new extrusion merge with the first extrusion.
November 18, 2018 at 11:31 amhassamSubscriber
Thank you very much for your help. I have managed to import the model now and need to follow theses steps to perform my pressure analysis on Ansys. Need your guidance through the process
b) If geometry, boundary conditions and material has a certain symmetry we ALWAYS use it reduce the problem size. Here an 2D axisymmetric (rotational symmetric approach is good).
c) The overlapping contact hast to be ramped (i.e. slowly increasing) to give accurate results. You will have to first get the stresses induced due to heat and in a second loadstep you will apply the loads (here pressures)
d)Please carefully study the chapter about FEM convergence, element quality etc. To get excellent contact pressure results you should try to make the contacting elements as quadratic (in 3D cubic) as possible (close to 100% element quality)
I need to create two simulations in DM (one with the minimum overlapping, one with the maximum interference)
November 18, 2018 at 4:26 pmpeteroznewmanSubscriber
There are two kinds of 2D models you could make. Axisymmetric and Plane Strain.
The faces in the XY plane of your 3D model could be used as a 1/4 model of the Plane Strain. It is good that you have two additional planes of symmetry. You set X = 0 and Y free on the edge on the Y axis, and you set Y = 0 and X free on the edge on the X axis.
Once the model opens in Mechanical, you must click on the Geometry branch, and in the Details window the row 2D Behavior has a pull down and you must select Plane Strain.
The depth is infinite, so there are no end effects in Plane Strain. This represents what you would see halfway along the axial length of a long part.
November 19, 2018 at 9:05 amKeyur KanadeAnsys Employee
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