Section Modulus calculation and optimization

Calculating Section Modulus of hood section:

Before:

I = 2.873704120e+05

Y = 877.8362/2

= 438.9181

S = I/Y

= 7.8229

After:

I = 2.908863375e+05

Y = 877.8362/2

= 438.9181

S = I/Y

= 12.9185

REPORT:

-> This is basically how a section of hood looks like.

-> We created with the help of intersecting curves.

-> For that we create a datum plate with respect to the direction of impact .

-> In this case we have impact from front.

-> So, we create a datum plane exactly in the centre from the front direction.

-> Here we intersected that plane with the faces of inner and outer panel of hood.

-> That will give us this section.

-> With help of this section we measure the distance from end to end and that divided by 2 will be 'Y'.

-> For moment of inertia we use the command Section Inertia Analysis with a hollow value 0.7.

-> By that we get a value for inertia for this we use minimum inertia ('I').

-> We calculate Section modulus by the formula.

S = I/Y

-> First one would done, after that we need to adjust the section for better stability and strength.

-> Here We offset the lower panel of hood by 0.5 mm which we increase the value by a little .

-> And, again we calculate the Section modulus by same formula.

-> We have two different values which are 7.8229 and 12.9185 which are first and second values respectively.

-> We can observe that the section modulus increased bit by changing the design and thus stability and strength of that particular part increases.