Uni experiement-chassis torsion

[joe_thompson]

Just thought id share a little experiment im doing at uni

Its basically to measure torsional rigidity of different style chassis's.

The models im using are made from card as you can see. Using a jig to measure the deflection(twist) of the structure when a mass is applies to the opposite side. Basically by applying weight to one side of the structure the opposite side changes in measurement from the measuring point and by this i can measure the torsional rigidity using:

T=mgr ............. torsion=mass*gravity*radius


I tested a normal chassis with a window screen, one with out and convertible.

And now id got the design a convertible thats now lighter and has a higher torsional rigidity factor , think im going possibly try one with a glass fibre bottom.



some of you may not be interested but some may soo

 

[R1PPU]

Some sick oragami skills there dude

 

[sarkel]

hmm in very in interested and let us know your full results

 

[joe_thompson]

hmm in very in interested and let us know your full results

Will post the results up when its all finished

 

[muiris]

what course are you doing joe?
looks interesting

 

[kammy11]

looks interestin mate, let us know about your results

 

[joey w]

we starting this module next week looks interesting man

 

[Kozy]

Very cool!

 

[Topher-EK9]

sweet mate thanks for sharing

 

[joe_thompson]

what course are you doing joe?
looks interesting

im doing motorsport engineering iv already got on in electronic engineering haha

 

[joe_thompson]

when i design the newer version il put up some pictures, we've got a little competition going on so see who can create the more rigid convertible structure under 56g

 

[joey w]

I'm doing Mechanical engineering love it so far ,so all going well, say the motorsport engineering is very interesting, ull have good prospects after it ,keep up the good work joe

 

[sandycheeks]

Looks very interesting, i am currently doing an engineering apprenticeship and would love to get into the motorsport side of things.

 

[joe_thompson]

Well guys the assignment was complete. I came 3rd out of 20 design's which isnt bad the winner kind of stretched the rules and didnt use a transmission tunnel, but its all good fun

My new design as 109% stronger in relations to torsional rigidity.

I used the aid of triangular supports on the front and rear pillars to add radius to the design, also increased the CSA of the transmission tunnel, bulk head and rear vertical platform. Adding radius made the most difference, although i wish i had increased the thickness of the sills and the vertical measurement.

I used 270gramme card and glass fibre.

It weighted in at 53g which was under weight too

Looks abit mess as i used the excess resin to cover over joints and the car in a attempt to reduce flex, also the transmission tunnel is ment to be lob sided

 

[_JT]

Cool! Nice to read this, thanks for sharing

 

[Kozy]

Good result there Joe, and an interesting project!

Did you have a look at the S2000 chassis at all?

 

[Ray888]

That looks like so much fun, well done on your result, so when is the real one coming along?

 

[Si vti]

nice little project! good models too.

 

[zakgallagher]

this is brilliance! good job.

 

[Ally138]

this is interesting. lookin forward to some results