Learning Forum

[Sand_1234]

Hi,

My 3D model has a pin connection on one end and roller at the other end.

For Pin, I used Displacement boundary condition and gave the value of 0 for x, y and z axes.

For roller, I used Displacement boundary condition and freed x and set y and z to 0.

I am wondering if this a right way to represent pin and roller support? Are moments automatically released ?

Thank you for your help!

[peteroznewman]

What did you select to apply the Displacement BC? If it was a face, then it is no longer a pin. If it was an edge, that creates high stresses on that edge.
Delete the two displacements and replace them with two Remote Displacements.
On the Pin end, you can constrain X, Y, Z to 0 and leave all the rotations Free.
On the Roller end, you can leave X Free and set Y and Z to 0 but you also need to set RX to 0 to prevent the body from spinning about the two ends.
Each Remote Displacement is scoped to an end face so there is no high stress at the ends.

[Sand_1234]

Thank you for the information.