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clear
//
//
//Initilization of Variables
P=245*10**6 //N-mm/sec //Power transmitted
n=240 //rpm
q_s=40 //N/mm**2 //Shear stress
theta=%pi*180**-1 //radian //Angle of twist
L=1000 //mm //Length of shaft
G=80*10**3 //N/mm**2
//Tmax=1.5*T
//Calculations
T=P*60*(2*%pi*n)**-1 //N-mm //Torsional Moment
Tmax=1.5*T
//Now For Solid shaft
//J=%pi*32*d**4
//Now from the consideration of shear stress we get
//T*J**-1=q_s*(d*2**-1)**-1
//After substituting value in above Equation we get
//T=%pi*16**-1*d**3*q_s
//Designing For max Torque
d=(Tmax*16*(%pi*40)**-1)**0.33333 //mm //Diameter of shaft
//For max Angle of Twist
//Tmax*J**-1=G*theta*L**-1
//After substituting value in above Equation we get
d2=(Tmax*32*180*L*(%pi**2*G)**-1)**0.25
//For Hollow Shaft
//d1_2=Outer Diameter
//d2_2=Inner Diameter
//d2_2=0.5*d1_2
// Polar modulus
//J=%pi*32**-1*(d1_2**4-d2_2**4)
//After substituting values we get
//J=0.092038*d1_2**4
//Now from the consideration of stress
//Tmax*J**-1=q_s*(d1_2*2**-1)**-1
//After substituting values and further simplifying we get
d1_2=(Tmax*(0.092038*2*q_s)**-1)**0.33333
//Now from the consideration of angle of twist
//Tmax*J**-1=G*theta*L**-1
//After substituting values and further simplifying we get
d1_3=(Tmax*180*L*(0.092038*G*%pi)**-1)**0.25
d2_2=0.5*d1_2
//result
printf("\n Diameter of shaft is:For solid shaft:d %0.2f mm",d)
printf("\n :For Hollow shaft:d1_2 %0.3f mm",d1_2)
printf("\n : :d2_2 %0.3f mm",d2_2)
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