Thank's for your input!Hi
May I suggest some ...... remarks ?
1/ Torsion on racing cars is not usualy taken in consideration like you did
the front (or the rear) bulkhead is fixed , then aload is apply at various distances on the right and on the left side say 100cm , 150,200 and on the rear bulkhead ( or the front)
2/ In your CAD file does each panel is "CAD welded" ? or the file is an solid extrusion ?
3/ Loads are applied within a lever and gradually to represent afinal effort of 25KN to 40KN depending on what will be the use of that tub
Hope this helps