Hi all. I want mimc a cylindrical column loaded by a pressure in Abaqus/Explicit. A quarter of model was established, and the circular displacement of the lateral surface of the column was constrained. Due to single CSYS could be used in Abaqus, the symmetric boundary condition of the symmetry surfaces was applied under the cylindrical CSYS. After simulation, I found that elements around the axis were distorted. Now, I want to know how to apply the symmetrical BC.

Abaqus ​​​​​​​