Browse Publications Technical Papers 2019-26-0168

Lightweigthing of Automobile Hood Using Multistep Optimization for Composite Material 2019-26-0168

: Emission norms across the world are getting more and more stringent day by day, in pursuit of saving the mother earth. Automotive industry is quick to respond to this huge challenge. One solution lies in making vehicles lighter. That's why scope of lightweight materials is more and more realized and explored. One of the front runners in the light weight material is Carbon Fiber Reinforced Plastics (CFRP). CFRP comes with own challenges in its understanding, designing and engineering. For effective use of the CFRP from a design and mass point of view, it has to be optimized in such a way so that every section and layup is utilized to its maximum potential. Current paper demonstrates the multi-step optimization approach used in a design and development of car hood. Initial assessment of the hood suggested that few attributes were falling short of the requirement targets, and that too with mass penalty. After interaction with respective teams, scope for the optimization was realized. Topology optimization was utilized to derive the right structure from decided design space, reinforce patterns and sections were worked out accordingly. Next step followed is the free size optimization. Basic composite learning were implemented in setting up the optimization problem. Results were used to decide the ply layups in different regions. Finally, hood model with derived sections and ply information was updated for the manufacturing considerations and assessed for multiple domain performance.


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