No Poisson Ratio for Link Element in FEA

AI Thread Summary
In finite element analysis (FEA), LINK elements do not have a Poisson ratio because shear forces are disregarded in the basic analysis of plane truss elements. Structural models that incorporate shear stress, such as Timoshenko beam theory, require the shear modulus, which is dependent on Poisson's ratio. LINK elements are generally not suitable for truss modeling; instead, BEAM elements are preferred for this purpose. LINK elements are primarily used to connect different parts or regions or for tension/compression-only applications. Understanding these distinctions is crucial for accurate structural modeling in FEA.
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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