Section Modulus calculation and optimization

Report On Section Modulus

The previously designed structure is a hood, let's see the strength of the hood, optimise the design then check the bending strength and finally calculate the section modulus.

Section Modulus

Section Modulus is a geometric property used to calculate the bending stresses in a structural member. Mathematically, It is defined as the ratio of the moment of inertia of a section about its centroidal axis and to the distance of the extreme layer from the neutral axis.

First Design Study

to study the design properly need to intersect the design from the middle zone and then complete the section modulus.

first image

now, let's calculate the section modulus and see the results

Moment of inertia(max) = 1.51011×10^7×mm^4

Moment of inertia(min) = 1.13956×10^5×mm^4

Y=488.9143/2=244.4571 mm

S=I/Y

S=1.13956×10^5/244.45= 466.173042 mm^4 = 4.72268111e10

After optimising the design

increase the moment of inertia

the results and new study images after the optimising

Moment of inertia(max) = 1.59207×10^7mm^4

Moment of inertia(min) = 1.31403×10^5mm^4

Y=488.9143/2=244.4571 mm

S=I/Y

S=1.31403×10^5/244.45= 537.54551 mm^4 =8.34950933e10

CONCLUSION:

moment of inertia is increased without changing the Y and also increased the strength.