Question

While calculating the stress induced in a closed coil helical spring, wahl's factor must be considered to account for -?

Answer 1

Answer:

Explained

Explanation:

walh derived an equation for stresses in spring and got

$\tau=K\frac{8WD}{\pi\times d^3}$

where K is called the Walh Stress factor and it is given by

$K= \frac{4C-1}{4C-4}+\frac{0.615}{C}$

C is the spring index walh's factor provides a simple method to find the resultant stresses in spring.

Spring index and Walh's factor are inversely proportional to each other.  In order to take into account effect of direct shear stress and change of coil curvature , Walh's factor is considered.