A second-order tensor named for Cauchy (“ko-SHEE”) gives this quantity for every point in a material. For 10 points each:
[10e] Name this quantity, which is linearly related to the strain in the elastic regime. Like pressure, it has units of force per unit area.
ANSWER: stress [prompt on sigma]
[10m] For a linearly elastic material, this quantity is the ratio of tensile stress to tensile strain. This quantity is infinite for a perfectly rigid body since no stress will change its length.
ANSWER: Young’s modulus [prompt on elastic modulus; prompt on E]
[10h] The tendency of a material to expand perpendicular to an applied stress is codified by this quantity, which is the negative of the transverse strain over the axial strain. Auxetic materials have a negative value of this quantity.
ANSWER: Poisson’s ratio [or Poisson ratio; prompt on Poisson; prompt on nu]
<Science - Physics>