Section Modulus calculation and optimization

Section modulus is a geometric property for a given cross-section used in the design and there is the calculation of inertia to be included that increase in the moment of inertia which increases the section modulus value

section modulus is the ratio of moment of inertia to the distance between the neutral axis and the extreme end of the object s=i/y

I=bd3/3

calculation

CASE :1

S1=I/Y

I1=1.213e6

y=480/2=240

S1=1213000/2

S1=5054.1666

CASE :2

S2=I/Y

I2=1.222e6

y=480/2=240

S2=1222000/2

S2=5091.16667

THUS Increase in area will leads to increase in section modulus

which is S is directly proportional to I and I is directly proportional to d.