Question

Draw a helical spring of circular wire and -in terms of load, dimensions, and material- express:

1. - max. shear stress,
2. - angular deflection,
3. - spring rate,
4. - energy stored,
5. - volume of spring wire,
6. - axial deflection, and
7. - length of spring wire.

Answer 1

helical spring of circular wire

max. shear stress $\tau_{max}= K_s {\frac{8FD}{\pi d^3}}$ where $K_s =1+\frac{1}{2C}$

axial deflection, $\delta= \frac{8FD^3N}{Gd^4}$

spring rate, K

length of spring wire. L