No Poisson Ratio for Link Element in FEA

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SUMMARY

In finite element analysis (FEA), LINK elements do not utilize Poisson's ratio due to the exclusion of shear forces in basic plane truss element analysis. Instead, structural models that incorporate shear stress, such as those based on Timoshenko beam theory, require the shear modulus, which is dependent on Poisson's ratio. LINK elements are primarily used for connecting different parts or regions and are not recommended for modeling trusses; BEAM elements are the preferred choice for such applications.

PREREQUISITES
  • Understanding of finite element analysis (FEA)
  • Familiarity with LINK and BEAM elements in structural modeling
  • Knowledge of Timoshenko beam theory
  • Basic concepts of shear stress and shear modulus
NEXT STEPS
  • Research the differences between LINK and BEAM elements in FEA
  • Study Timoshenko beam theory and its applications in structural analysis
  • Explore the implications of shear stress in finite element modeling
  • Learn about the calculation and significance of shear modulus in structural engineering
USEFUL FOR

Structural engineers, finite element analysts, and anyone involved in modeling truss structures in FEA will benefit from this discussion.

rmrramani
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in finite element analysis there is no poisson ratio for LINK ELEMENT (truss structure)
just explain ?
 
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Because shear forces are ignored in the basic analysis of plane truss elements. Structural models that take into account shear stress (Timoshenko beam theory) will give results involving the shear modulus, which is a function of Poisson's ratio.
 
Just as an aside LINK elements are typically not used for trusses. For modeling a truss, you would really want to use a BEAM element. You use LINK when either trying to simply tie together a couple of different parts/regions or need tension/compression only spars.
 

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