Auxetics are materials with a negative Poisson's ratio.
What does PR stand for?
PR stands for Poisson's Ratio
This definition appears very frequently and is found in the following Acronym Finder categories:
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We have 88 other meanings of PR in our Acronym Attic
- Pilot Run
- Pinar del Rio (postcode, Cuba)
- Pine-Richland (Pennsylvania school district)
- Pitch Runner (baseball)
- Planet Replay (media/electronics store)
- Planned Requirement
- Planning and Responsibility
- Plymouth Rock (chicken breed)
- Pneumatic Ram
- Point Roberts (Washington)
Samples in periodicals archive:
In both curves, there is a well-defined positive elastic Poisson's ratio up to 4-5% of total strain, but there is a negative plastic Poisson's ratio (very close to zero).
Dimensionless analysis Using a dimensionless analysis on independent input variables, Poisson's ratio becomes redundant in predicting the value of the optimal bolt length (Luo 1999), the value of which could be approximated using Eq.
Typical values of Poisson's ratio for all the layers were assumed corresponding to the materials found in the road test sections based on data reported in the literature (Huang 1993).
90[degrees]] 8500 Modulus in shear 3000 Poisson's ratio, [v.
Poisson's ratio is the worst determined elastic characteristic of all because its influence on the eigenfrequencies of the specimen is sufficiently lower than other elastic characteristics and is difficult to measure by classical tests (Frederiksen 1998).
For this analysis, the initial tangent modulus and Poisson's ratio (Vs) were the inputs.
k] is indentation hardness, R is the radius of the hemispherical indenter, P is the force on the indenter, h is the depth on indentation, E is the elastic modulus, and u is Poisson's ratio (usually approximated as 0.