Talk Composites - The Forum for Advanced Composites

Carbon Fibre Tubes

http://www.talkcomposites.com/Topic8863.aspx

By sahil.tfateh - 12/17/2013 5:22:23 PM

I am planning to make A arms and the push-rods using carbon fibre tubes.
How should I chose the inner dia and outer dia of the tubes so as to avoid failure.
provided the forces are
1903.803297 front lower A
2166.240985 rear lower A
414.642784 front upper A
394.6610908 rear upper A
all forces in lbs
By Warren (Staff) - 12/19/2013 9:50:54 AM

You need to derive it mathmatically.  The figures given above are all relative to the surface area the force is being exerted through - look at the definition of the units......

If you arent using FEA as part of CAD software then you have a lot of equations to derive mathematically all mostly based on Newtons laws, Euhlers equations of motion, hooks law etc etc etc. the more you simplify the model the less complicated the maths is.