impact attenuator

[agi_iitb]

i need any kind of info on impact attenuators specially on the kind of materials used. thanks

[agi_iitb]

i need any kind of info on impact attenuators specially on the kind of materials used. thanks

[Matt N]

Aluminum honeycomb. Use the find button on this site and you will find that there are a lot of existing threads which should answer your questions - they haven't changed the impact attenuator requirements in a while (except size).

Matt

[vandit]

honey comb is the best and lightest....but there r teams which also uses poly urethane foam...or PU foam....it comes in various densities ....just do some impact test on different densities pieces in your college workshop and calculate the right one for you....

[Drew Price]

Make sure you address the aluminum honeycomb's weakness in the lateral direction.

Best,
Drew

[John Grego]

Just a comment on your "signature." Good idea about naming the car after your girlfriend...but do you want all your drivers taking a ride on your her?

[Brett Neale]

I believe we use high density polystyrene foam. We find it much better than the ally honeycomb as it's reusable - the attenuator we "destructively" tested is the same one we used on the racecar. No need for spares.

[Drew Price]

Brett, I like it! We experimented a little with PU foam, but it was much too dense, may play around with it more this year. Last year we used Nomex honeycomb with Aluminum sheet separators, and crushed very linearly, and seems to have pretty good off-axis crush too.

John, I like the way you think, but she was actually present at the meeting where that came up (we have a groupie!), and I think she laughed the hardest of anyone there.

Which I took to be a good thing.

Best,
Drew