Photo &copy dunand.northwestern.edu. In metallurgy, strain can simply be defined as the deformation of a solid due to stress. In other words, strain is a measure of deformation reflecting how much a material has been stretched (or compressed) when compared to its original length.If there is an increase in the length of a piece of metal due to stress, this is referred to as tensile strain.n other words, strain is a measure of deformation reflecting how much a material has been stretched (or compressed) when compared to its original length.
1 AU = 149,597,870.700 kilometers (or 149,597,870,700 meters). Definition: An Astronomical Unit is the mean distance between the Earth and the Sun.In 2012, the International Astronomical Union defined the distance to be 149,597,870,700 meters. Historical Background: Tycho Brahe estimated the distance between the Sun and the Earth at 8 million kilometers (5 million miles).Later, Johannes Kepler estimated the AU was at 24 million kilometers (15 million miles).n 2012, the International Astronomical Union defined the distance to be 149,597,870,700 meters. Historical Background: Tycho Brahe estimated the distance between the Sun and the Earth at 8 million kilometers (5 million miles). Later, Johannes Kepler estimated the AU was at 24 million kilometers (15 million miles).
Definition of astronomical unit. Mean distance in AU from sun to each planet. Mean distance in AU from sun to some dwarf planets. Mean distance in AU to Kuiper Belt, farthest spacecraft, Oort Cloud.