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

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SUMMARY

This discussion focuses on utilizing infinite element domains in COMSOL to optimize simulations of axial stress on sensors, particularly to reduce simulation time. The user aims to apply an infinite element domain to a single sensor node to analyze buckling under opposing stresses. Caution is advised regarding the use of periodic boundary conditions, as they may compromise the accuracy of asymmetric buckling mode analyses. The Kirsch problem serves as a relevant example of infinite elements in stress analysis, with additional resources available in COMSOL's Application Gallery.

PREREQUISITES
  • Familiarity with COMSOL Multiphysics software
  • Understanding of stress analysis principles
  • Knowledge of buckling behavior in materials
  • Experience with boundary condition applications in finite element modeling
NEXT STEPS
  • Explore the implementation of infinite element domains in COMSOL Multiphysics
  • Research the Kirsch problem and its application in stress analysis
  • Learn about periodic boundary conditions and their implications on simulation results
  • Investigate COMSOL's Application Gallery for case studies involving infinite elements
USEFUL FOR

Engineers, researchers, and simulation specialists involved in stress analysis and finite element modeling, particularly those using COMSOL for complex simulations.

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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