Discounting principle. - Discounting principle: Discounting principle refers to a rule of Attribution which states that the perceived role of a cause will be discounted or reduced if other plausible causes are also present.
The Poisson Effect When a tensile stress is applied to a material, the material elongates in the direction of the applied stress, and contracts perpendicular to the direction of the applied stress. This relationship, called the Poisson effect, is a natural response to applied stress that occurs with all materials, but is particularly apparent with ductile materials. For example, when a metal bar is pulled in a tensile test, it stretches out and necks down on. the sides.
Poisson's ratio is. 1  the ratio of the relative contraction strain (or transverse strain) normal to the applied load-to the relative extension strain (or axial strain) in the direction of the applied load.hen a material is stretched in one direction it tends to get thinner in the other two directions. Î¼ = - Îµt / Îµl (1) where Î¼ = Poisson's ratio Îµt = transverse strain Îµl = longitudinal or axial strain.