Two helical springs of the same material ( permissile shear stress is 5800 KN/cm^2 , and modulus of rigidity is 10000 KN/m^2 ) and free length are used to make a concentric spring. The concentric spring is compressed 2.8 cm by an axial load of 360 KN. Assuming that spring index of both springs is 7 foe each spring .
Determine for each spring :
load ,
stored energy ,
angular deflection ,
number of coils ,
wire diameter ,
spring diameter .
"C = \\dfrac{D}{d}"
7 = D/2.8
D = 19.6 cm
spring diameter = 19.6cm
"\\theta = \\dfrac{16FD\u00b2}{Gd^4} ="
"\\dfrac{16\u00d7360\u00d719.6\u00b2 }{5800\u00d72.8^4} ="
6.2 rad
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