Section Modulus calculation and optimization
AIM:
Section modulus calculation and optimization.
OBJECTIVE:
Use section of the Hood and calculate the section modulus.
Vary the section in such a way that new section is an improved version of previous section.
THEORY:
Section modulus is to find the geometric property for a given cross-section used in the design.
Calculate the section modulus using the formula S=I/Y
S= Section modulus
I= Moment of Inertia
Y= Distance between neutral axis and the extreme end of the object
Section Modulus Calculation:
For studying the section modulus we need the cross section of hood. For that I created a cross section using intersection curve.
Study-1
Find the moment of inertia using a section.
Here the maximum moment of inertia, I = 4.198*10^5 [mm^4]
The distance between neutral axis and extreme end of the object, Y = 242.11 mm
Therefore the Section Modulus,
S1 = I/Y
S 1= 4.198*10^5 [mm^4] / 242.11 [mm]
S1= 1733.922597[mm^3]
STUDY 2:
When I increased the distance between the outer panel and inner panel by 0.5mm. I got the MOI as shown below:

Here the minimum moment of inertia, I = 4.455*10^5 [mm^4]
The distance between neutral axis and extreme end of the object, Y =242.11mm
Therefore the Section Modulus,
S = I/Y
S = 4.455*10^5[mm^4] / 242.11 [mm]
=1840.072693 [mm^3]
CONCLUSION:
In this study, we take the maximum of inertia moment to analyze the maximum limit of hood deformation. Thus the section modulus of the
front hood was calculated and compared with the new design.
From the result we found out that increasing the cross-section area would give a better section modulus and helps in increasing the strength of
the hood.