The entire ship is made of composites to escape from the radar signals. The ship superstructure which equips the sensitive electronics and controls are made of CFRP and GFRP sheets sandwiched with balsa wood. Composite sheets are bonded to balsa wood with adhesive, delamination, and damage of the ship superstructure need to be studied for air blast and shock loads due to firing.
This air blast analysis involved severe deformation of the sandwiched panel with the self contacts and posed mesh convergence and solutions stability issues. This problem involved geometric, material and contact non-linearity
Scope of Work:
Air blast analysis was performed on the composite ship superstructure (sandwich construction) by applying pressure pulse of 2MPa and 400KPa.
Simulated progressive damage failure of the sandwiched composites and balsa wood and de-lamination study between wood and composite. There was a 9% difference from the experimental results.
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