How can I model thermal contraction in Comsol for an elastic solid?

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SUMMARY

This discussion focuses on modeling thermal contraction in an elastic solid using COMSOL Multiphysics. The user aims to simulate the stresses resulting from a 5 K temperature drop, which induces contraction. The challenge lies in applying the coefficient of thermal contraction within the Material Properties sub-menu of the Physics menu. The user seeks guidance on achieving uniform contraction to effectively model the resultant stresses.

PREREQUISITES
  • Familiarity with COMSOL Multiphysics software
  • Understanding of elastic solid mechanics
  • Knowledge of thermal contraction principles
  • Experience with material property definitions in simulation software
NEXT STEPS
  • Research the application of thermal expansion coefficients in COMSOL Multiphysics
  • Explore the use of the "Thermal Stress" module in COMSOL
  • Learn how to define material properties for elastic solids in COMSOL
  • Investigate methods for simulating uniform contraction in finite element analysis
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Engineers, researchers, and students involved in materials science, mechanical engineering, or finite element analysis who are looking to model thermal effects on elastic solids using COMSOL Multiphysics.

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Hello everybody,

Thank you in advance for your help.

I am trying to model thermal contraction of an elastic solid in Comsol. I am sure this is a simple model, but I am a new Comsol user and it is not obvious to me.

My goal is to model the stresses within an elastic solid, that arise as a function of thermal contraction. The temperature is dropped by 5 K, and as a result, the solid should contract. I believe that I should be able to prescribe a coefficient of thermal contraction somewhere, but I couldn't do this in the Material Properties sub-menu of the Physics menu.

Actually, if you have any other suggestions as to how to achieve UNIFORM contraction in Comsol, that would suffice, because my main goal is to model stresses as a result of contractility.

Thank you very much for your time.
 
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If the body cools uniformly and it is unconstrained, no stress will develop.
 

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