Ratio of axial and lateral strains
Formulated so most materials with positive value
ν= -Єx = -Єy Єz Єz
Materials with a negative Poisson Value
Density may vary from one-trillionth the density of air or 100 billion times air
Formed -460*F or 10,000+ heat of white dwarf stars
Auxetic materials
Larger when stretched
Smaller when compressed
Normal materials
Smaller when stretched
Larger when compressed
Nature
Neutron stars
White dwarf
Skin of a cat
Manufactured(still under research)
Artificial muscles
Artificial arteries
Structural connectors
Increased shear stiffness
Increased plane strain fracture toughness
Increased indentation resistance
Superior to conventional materials for many practical applications