Parabolic spring

A parabolic spring is a special type of leaf spring .

In order to achieve a constant voltage distribution has a parabolic spring (similar to a trapezoidal spring) a variable along the length of area moment of inertia in that the thickness of the spring according to a parabola changes: . ${\displaystyle h=h(l^{2})}$

Spring stiffness :

${\displaystyle c={\frac {E\cdot b\cdot {h_{max}}^{3}}{8\cdot l^{3}}}}$

With

• l: Young's modulus
• b: width
• ${\displaystyle h_{max}}$: maximum thickness
• l: length up to the maximum thickness.