If the Poisson’s ratio of the material if positive, then tensile/compressive strains in the x-direction produce compressive/tensile strains in the y- and z-directions, as shown below. Negative Poisson ...

Stress is a measure of the distribution of internal forces that develop within a body to resist these applied loads. There are two main types of stress - normal stress, which acts perpendicular to a ...

HOUSTON, June 21 (UPI) -- U.S. researchers say a nano-infused "strain paint" can reveal stress in materials and holds promise for detecting strain in aircraft, bridges and buildings. Scientists at ...