Section Modulus calculation and optimization
Created a new part file for section modulus calculations and imported in main assembly.
Using WAVE geometry linker, all inner and outer panel serfaces imported in this assembly. Created a datum plane at center of outer panel with 50% arc radius and created intersection curve for all surfaces.

Modified the sketch to closed contour by project curve and studio spline.

Finally created section modulus of section as shown in above image.

Here we get minimum moment of inertia(I) 1.41011523e+06mm^4.
and calculated maximum distance of component(y) 870.41

So by calculating section modulus using formula S=I/Y, we got the section modulus as 0.091644mm^3.