Section Modulus calculation and optimization
Aim
To calculate section modulus of hood and optimize the design to have improved section modulus.
Section modulus:-
Section modulus is a direct measure of a strength of any cross sectional area of an object about an reference axis.
The formula of section modulus is given by,
S=I / Ymax
Where,
I = Moment of inertia (mm^4)
Y = Distance between neutral axes and outermost fiber (mm)
Steps to calculate section modulus:-
- Step 1:- Find location of centroid of given cross section.
- Step 2:- Find moment of inertia about neutral axis (INAINA)
- Step 3:- Find YmaxYmax from neutral axis.
- Step 4:- Find elastic section modulus using the formula provided above.
Moment of inertia is nothing but offering resistance against the moment, bending or twisting. So higher the moment of ineria higher will be its resistance to deform is higher.
Here the sectional modulus of hood design before optimization
FRONT CRASH :
ITERATION 1:
ITERATION 2:
SECTION MODULUS:
`SIDE CRASH :
ITERATION 1:
ITERATION2 :
SECTION MODULUS:
COMPARISION:
CONCLUSION
The inner pannel strength is increased, while changing the geomentrical property of the embose. By considering the above calculation the section modulus value for the design will increase. This results in, that the hood will resist more stress when the external stress increases. While Comparing with first hood design, second hood design will resist more bending stress.