Classical Mechanics (1805~1963)
해밀턴 ~ 티모센코
해밀턴 ~ 티모센코
Frenet-Serret Formulas (1847, 1851)
In differential geometry, the Frenet–Serret formulas describe the kinematic properties of a particle moving along a differentiable curve in three-dimensional Euclidean space or the geometric properties of the curve itself irrespective of any motion. More specifically, the formulas describe the derivatives of the so-called tangent, normal, and binormal unit vectors in terms of each other. The formulas are named after the two French mathematicians who independently discovered them: Jean Frédéric Frenet(1816~1900), in his thesis of 1847, and Joseph Alfred Serret(1819~1855), in 1851.
The Bauschinger effect refers to a property of materials where the material's stress/strain characteristics change as a result of the microscopic stress distribution of the material. For example, an increase in tensile yield strength occurs at the expense of compressive yield strength. The effect is named after German engineer Johann Bauschinger (1834~1893).