Freely available models of structural areospace components?

For a student project I try to find freely available models of areospace components, e.g. brackets, that I can print in Ti6Al4V. They should be as realistic as possible and be employed in airplanes or spacecrafts. For the project I´d like to generate a topology optimzed models and compare the original and new one.

Any suggestions?

Many thanks in advance!!

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Check out the entries from this GE challenge a few years ago;

https://grabcad.com/challenges/ge-jet-engine-bracket-challenge

The challenge was exactly what you are talking about and started with an actual bracket. You can also check your results to the other participants.

 
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