impact attenuator testing

[VARUN RAJ]

hi guys
can u pls tell me hw to check deceleration (both peak and avg) without doing a crash test using accelerometers since our university doesn't hv tat facility and tat would be costly outside.........

[Dash]

Do a quasi-static test.

[Bemo]

As far as I know quasi-static tests aren't accepted anymore, so you'll have to figure something out...

[Dash]

Depends on the competition I guess.

[atm92484]

1) Attach attenuator to front of old car.
2) Rent a backhoe.
3) Place bucket of backhoe in ground.
4) Get freshmen to drive car into bucket.
5) Profit.

[VARUN RAJ]

we could determine average deceleration by drop test but for peak deceleration its costing too much if we use accelerometers..

[Pete Marsh]

You could read rule B3.21.11

[John_Burford]

Please review 2012 B3.21.10

Quasi-static testing may be performed by teams using their universities facilities/equipment, but teams are advised to exercise due care when performing all tests.


ATM92484: bonus points for combining South park and You Tube.

[RobbyObby]

Quasi-static testing will give you force-displacement data. You have been given a specified mass in the rules. And this pretty swell guy named Newton came up with a nifty relationship between force, mass, and acceleration. You should be able to figure out the rest.

And Bemo, the North American competitions still allow quasi-static testing, but seeing as how the deadline for IA data was almost a month ago, I assume the OP is competing elsewhere. I can't speak for the other comps, but I believe they've been trying to standardize all rulebooks, so I would assume the other comps allow it as well ( I know for sure FS-UK does).

[Bemo]

That's why I used the phrase "As far as I know" http://fsae.com/groupee_common/emoticons/icon_wink.gif

[TMichaels]

Bemo is right. FSG for example does not allow quasi-static testing.

[Bemo]

In that case it is also not accepted in Austria as the FSG-rules are in charge there. So at least I wasn't completely wrong...

[AxelRipper]

http://fsaeonline.com/page.asp...a9-97ec-eb1c07fbe3c0 (http://fsaeonline.com/page.aspx?pageid=193613e4-fff1-4ea9-97ec-eb1c07fbe3c0)

[VARUN RAJ]

thnx a lot guys i think quasi static testing would be goodhttp://fsae.com/groupee_common/emoticons/icon_smile.gifhttp://fsae.com/groupee_common/emoticons/icon_smile.gifhttp://fsae.com/groupee_common/emoticons/icon_smile.gif

[VARUN RAJ]

guys what shuld b the load for quasi static testing?????

[crdekate]

can we test our impact attenuator in 1:3 scale and multiply the results obtained by 3 in quasi static testing?

[Bemo]

Short answer is: NO!

[crdekate]

thanx for replying!!!