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

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Using an infinite element domain in COMSOL can potentially simplify stress simulations on a sensor, particularly to reduce simulation time. The goal is to model axial stress in opposite directions to analyze buckling effects, but concerns arise about the accuracy of results when applying periodic boundary conditions or symmetry simplifications. It's crucial to avoid losing asymmetric buckling modes during analysis. The Kirsch problem serves as a relevant example of infinite elements in stress analyses, and similar cases can be found in COMSOL's Application Gallery. Proper implementation of infinite elements could lead to more efficient simulations while maintaining accuracy.
uppityd
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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.
 

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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.
 

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