Carbon Composite Shear Modulus (G) for torsion bar
Carbon Composite Shear Modulus (G) for torsion bar
(OP)
Hi all,
I am trying to calculate the spring rate of a torsion bar, and analyse the feasibility of a cmposite design to substitute the steel one.
Now in order to calculate the spring rate i need to know the Shear Modulus of elasticity. How does CF comapre to steel in that regard?
I am aware that it (G) depends on the layout of the composite and the type of manufacturing.. etc
Here is where i need your advice, if you wanted to replicate the same spring rate of a torsion bar with a composite design how would you go about it?
I am trying to calculate the spring rate of a torsion bar, and analyse the feasibility of a cmposite design to substitute the steel one.
Now in order to calculate the spring rate i need to know the Shear Modulus of elasticity. How does CF comapre to steel in that regard?
I am aware that it (G) depends on the layout of the composite and the type of manufacturing.. etc
Here is where i need your advice, if you wanted to replicate the same spring rate of a torsion bar with a composite design how would you go about it?





RE: Carbon Composite Shear Modulus (G) for torsion bar
You will get a weight advantage, but at a considerable development time and materials cost.
Regards
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RE: Carbon Composite Shear Modulus (G) for torsion bar
RE: Carbon Composite Shear Modulus (G) for torsion bar
I was thinking of using a filament winding technique around a core (what material are typically used for cores?).
I am intrigues by the application of composites in compression springs, but i could not find much information on the web or through SAE.
Can you tell me where to find more information on the topic?
RE: Carbon Composite Shear Modulus (G) for torsion bar
RE: Carbon Composite Shear Modulus (G) for torsion bar
Polyurethane or PVC foam will also work.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Carbon Composite Shear Modulus (G) for torsion bar
Do you think through filamnet winding you could achieve a comparable shear modulus to that of steel?
RE: Carbon Composite Shear Modulus (G) for torsion bar
What you need is a _pultruded_ CF tube.
And, possibly, move this to the Engineering tips - Composite engineering Forum.
Reinking
RE: Carbon Composite Shear Modulus (G) for torsion bar
i will investigate the pultruded technique and move the topic on the proper forum.
Thank You
Fegizii
RE: Carbon Composite Shear Modulus (G) for torsion bar
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.