COMSOL: stress on a sensor, how to use infinite element domain?

[uppityd]

At the risk of waiting hours on simulations of a sensor, I was wondering if I could use infinite element domain on COMSOL to simplify it.
The first image consists of what I would like to simulate but found out that the simulation time is a huge factor as I have a lot to simulations to conduct. It describes axial stress on the sensor in opposite directions to encourage buckling and see the extent of it.

What I hope is to use one sensor node and apply an infinite element domain to it.

The problem is that I am not entirely sure how to do this.

 

[FEAnalyst]

Maybe you could use periodic boundary conditions instead. But be careful with any form of symmetry-related simplifaction in buckling analyses - you will lose asymmetric buckling modes.

When it comes to the use of infinite elements in stress analyses, Kirsch problem is a common example. Comsol's Application Gallery features such a case as well and infinite domain is used there.