The discussion centers around the applicability of Poisson's ratio in scenarios where no external loadings are applied, specifically in the context of a free rod subjected to temperature changes. Participants explore the relationship between thermal expansion and Poisson's ratio, questioning how to calculate changes in diameter under these conditions.
Participants express differing views on the applicability of Poisson's ratio without loadings, and while some agree on the use of thermal expansion formulas, there is no consensus on the broader implications of Poisson's ratio in this context.
Participants highlight the need for conditions such as small strain for certain formulas to apply, and there are references to specific contexts where Poisson's ratio may change based on external factors like temperature and mechanical loads.
This discussion may be of interest to those studying thermal expansion, material science, and the effects of temperature on material properties, particularly in engineering applications.
Poisson's Ratio is stress related. If you apply a stress in a given direction causing a strain, it quantifies what happens in lateral directions in terms of expansion/contraction for a given material.question4 said:
So in order to find the change of the diameter is it enough to say that : Δd= α*ΔΤ*d ?erobz said:
Well, I believe that formula is for ##\frac{\delta }{L} \ll 1##, but basically...yes.question4 said:
