... constant, 150 , 287, 388spring index, 286stiffness, 150 , 342, 386tension, 150 152 torsion, 150 152 , 290±293Spur gears, 253, 425Square threads, 247±248, 251Stabilityanalysis of, 414± 415 criteria ... 171deformation and, 3, 160±163, 389eccentric loading, 170expression for, 157 impact analysis, 157 159 maximum values, 158 springs and, 150 151 stiffness, 149±172strain energy, 160±162See also BeamsDegrees ... 83, 150 linear characteristic, 374±375mass-damper system, 617±618materials for, 283 mechanical work and, 374±375multileaf, 292±296nonlinear, 150 potential energy, 85±86, 374±375rates, 150 151 ,...