The list: Torsional Rigidity

[Sunny]

dear friends i want to ask a question? what is torsional rigidity ? Can someone explain it?

It is the ability of an object to resist a twisting force. For the math behind it, check here - Torsional Rigidity -- from Wolfram MathWorld

 

[Beemer B773ER]

Lamborghini Aventador: 35,000 Nm/deg (Source)

Lamborghini Gallardo Super Trofeo Stradale: 35,000 Nm/deg (Source)

Lexus LF-A: 39,130 Nm/deg (Source)

UPCOMING (2014) Audi R8: 40,000 Nm/deg (Source)

Aston Martin Rapide: 28,000 Nm/deg (Source)

Koenigsegg Agera: 58,000 Nm/deg (Source)

Koenigsegg Agera R: 65,000 Nm/deg (Source)

Bugatti Veyron Grand Sport: 22,000 Nm/deg (Source)

Fisker Karma: 33,000 Nm/deg (Source)

 

[donkeykong]

It is the ability of an object to resist a twisting force. For the math behind it, check here - Torsional Rigidity -- from Wolfram MathWorld

Appreciate that

 

[Deckhook]

Lamborghini Aventador: 35,000 Nm/deg (Source)

Lamborghini Gallardo Super Trofeo Stradale: 35,000 Nm/deg (Source)

Lexus LF-A: 39,130 Nm/deg (Source)

UPCOMING (2014) Audi R8: 40,000 Nm/deg (Source)

Aston Martin Rapide: 28,000 Nm/deg (Source)

Koenigsegg Agera: 58,000 Nm/deg (Source)

Koenigsegg Agera R: 65,000 Nm/deg (Source)

Bugatti Veyron Grand Sport: 22,000 Nm/deg (Source)

Fisker Karma: 33,000 Nm/deg (Source)

I wonder why the two Koenigsegg Ageras are producing such high figures compared to the Bugatti, I would have thought they were all using similar processes and CF tub designs?

 

[Sunny]

I wonder why the two Koenigsegg Ageras are producing such high figures compared to the Bugatti, I would have thought they were all using similar processes and CF tub designs?

Veyeon don't have a CF tub AFAIK. The figure above is for Veyron Grand Sport, it is a convertible, the lack of roof has a huge impact on torsional rigidity. The figure for the Veyron coupe is 60000Nm/deg.

 

[bum-man]

I think the Agera numbers might be misleading. They seem like they are just measurements of the tub and exclude the measurements at the suspension towers.

 

[GTA45E]

Good luck, James. Finding these numbers isn't easy

However

27,000 NM - Pagani Zonda F
25,000 Nm - Pagani Zonda C12

Wow, where in the world have you been, welcome back!

Interesting thread btw.

The Mercedes SLR coupe was way up there in frequency... Some noted it was the highest for it`s time.

^
As usual bum-man has a good point.

 

[K-A]

To anyone still confused about what Torsional Rigidity means, the best "description for dummies" that I heard (that made the best/easiest sense as well), was imagine King Kong holding a car with each hand (right hand - rear of car / left hand - front of car), and twisting the car in opposite directions.

 

[Sunny]

5GT - 31000 nm/deg

 

[K-A]

Does anyone have T.S figures for the Porsche Panamera? I'm really curious to know what it is. Considering both Porsche and VAG's track record of incredibly stiff cars, I'm expecting the Panamera to have an earth shattering number.

 

[Beemer B773ER]

Does anyone have T.S figures for the Porsche Panamera? I'm really curious to know what it is. Considering both Porsche and VAG's track record of incredibly stiff cars, I'm expecting the Panamera to have an earth shattering number.

I've searched...but no luck.

 

[Mr. Mercedes]

Does anyone have T.S figures for the Porsche Panamera? I'm really curious to know what it is. Considering both Porsche and VAG's track record of incredibly stiff cars, I'm expecting the Panamera to have an earth shattering number.

Does VAG have incredibly stiff cars? On my current model A3, A5 and Golf GTI, when going over certain bumps or travelling along certain inclines and declines at lower speeds you could/can actually hear the doors moving in their apertures. It might be an indication of flex or door seal rubber, but I've never heard this on a BMW or Benz. In fact its routine practice for all VAG cars to have their door seals lubricated at each service. This started making me wonder how stiff these cars actually are. But then again it could also just be cheap door seals.

 

[K-A]

Does VAG have incredibly stiff cars? On my current model A3, A5 and Golf GTI, when going over certain bumps or travelling along certain inclines and declines at lower speeds you could/can actually hear the doors moving in their apertures. It might be an indication of flex or door seal rubber, but I've never heard this on a BMW or Benz. In fact its routine practice for all VAG cars to have their door seals lubricated at each service. This started making me wonder how stiff these cars actually are. But then again it could also just be cheap door seals.

Yikes. I have a feeling that there's a wide range as to how well built and stiff VAG cars are.

However, from this Thread, VAG cars have some of the highest Torsional Rigidity figures, it seems, even the Passat has an incredible figure. Also, the Phaeton, Bugatti of course, etc.

 

[Giannis]

Is the number for the new Audi A6 availiable, guys?

 

[mayham85]

i wish to know golf mk6 (not gti) and seat leon`s numbers does anyone have these?

 

[Mr. Mercedes]

Yikes. I have a feeling that there's a wide range as to how well built and stiff VAG cars are.

However, from this Thread, VAG cars have some of the highest Torsional Rigidity figures, it seems, even the Passat has an incredible figure. Also, the Phaeton, Bugatti of course, etc.

I suspect it's probably more to do with the door seals.

 

[K-A]

Maybe, but those cars could very well be shoddily built/rigid as well I'm sure. VAG is so huge now, I wonder how well their consistency between ranges is becoming in this regard. It's definitely better than it used to be, no doubt.

 

[twsnelson]

anyone knw abt torsional rigidity for Hummmer, Jeep?? and the souces link?

 

[K-A]

Chevrolet Cruze: 17.66 KNm/degree of deflection.

Seems rather low for a car touted for such a solid structure.

 

[chonkoa]

There is a difference between Torsional rigidity and Compressive strength(which some members confused for Torsional rigidity) so I don't think we ought to place too much emphasis on it alone.
I think it will be more prudent to look at the system(shell in this case) from the perspective of the 3-principal stresses: Torsional, Axial(Compression/Tension) and Bending.